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4.27 SIXTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF
     SEPTEMBER 9, 1998

                       SIXTH AMENDMENT TO CREDIT AGREEMENT

SIXTH AMENDMENT TO CREDIT AGREEMENT (this "Amendment"), dated as of September 9,
1998, among COLTEC INDUSTRIES INC, a corporation organized and existing under
the laws of the State of Pennsylvania (the "Company"), Coltec Aerospace Canada
Ltd., an Ontario corporation (the "Canadian Borrower"), the various Subsidiaries
of the Company that are Credit Parties on the date of this Amendment, the
various Banks party to the Credit Agreement referred to below, BANK OF AMERICA
NATIONAL TRUST AND SAVINGS ASSOCIATION (as successor by merger to Bank of
America Illinois), as Documentation Agent, THE CHASE MANHATTAN BANK, as
Syndication Agent, BANKERS TRUST COMPANY, as Administrative Agent, and BANK OF
MONTREAL, as Canadian Paying Agent. All capitalized terms used herein and not
otherwise defined shall have the respective meanings provided such terms in the
Credit Agreement.

                              W I T N E S S E T H :


                  WHEREAS, the Company, the Canadian Borrower, the Banks, the
Documentation Agent, the Syndication Agent and the Administrative Agent are
parties to a Credit Agreement, dated as of March 24, 1992, amended and restated
as of January 11, 1994 and further amended and restated as of December 18,
1996, (as amended, modified or supplemented to the date hereof, the "Credit
Agreement"); and

                  WHEREAS, the parties hereto have agreed to amend the Credit 
Agreement as herein provided;

                  NOW, THEREFORE, it is agreed:

I.       Amendments to Credit Agreement.

                  1.  Section 3.03(e) of the Credit Agreement is hereby amended
by inserting immediately after sub-clause (E) appearing in the second
parenthetical thereof the following: "and (F) the sale of the Burbank Property,
if consummated prior to June 30, 1999 pursuant to the requirements of Section
9.02(xxvi)".

                  2.  Section 7.08 of the Credit Agreement is hereby amended by
deleting clause (b) thereof in its entirety and inserting in lieu thereof the
following new clause (b):


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                  "(b) No Credit Party nor any of its Subsidiaries is engaged,
         directly or indirectly, principally, or as one of its important
         activities, in the business of extending, or arranging for the
         extension of, credit for the purpose of purchasing or carrying Margin
         Stock. No part of any Credit Event (or the proceeds thereof) will be
         used to purchase or carry any Margin Stock or to extend credit for the
         purpose of purchasing or carrying any Margin Stock except for (i)
         purchases of Company Common Stock in compliance with Section 9.03 and
         (ii) purchases of up to $2,500,000 in the aggregate at any time
         outstanding with respect to Permitted Investments made under Section
         9.05(vi). Neither the making of any Loan hereunder, nor the use of the
         proceeds thereof, nor the occurrence of any other Credit Event, will
         violate or be inconsistent with the provisions of the Margin
         Regulations. At the time of each Credit Event and after giving effect
         thereto, less than 25% of the value (as determined by any reasonable
         method) of the assets of the Company and its Subsidiaries taken as a
         whole will constitute Margin Stock."

                  3.  Section 7 of the Credit Agreement is hereby amended by 
inserting the following new Section 7.29 at the end thereof:

                  "7.29  Year 2000.  All Information Systems and Equipment are
         either Year 2000 Compliant, or any reprogramming, remediation or any
         other corrective action, including the internal testing of all such
         Information Systems and Equipment, are expected to be completed by June
         30, 1999. Furthermore, to the extent that such reprogramming,
         remediation or other corrective action is required, the cost thereof,
         as well as the cost of the reasonably foreseeable consequences of
         failure to become Year 2000 Compliant, to the Company and its
         Subsidiaries (including, without limitation, reprogramming errors and
         the failure of other systems or equipment) is not reasonably expected
         to result in a Default, an Event of Default or a materially adverse
         effect on the business, property, assets, condition (financial or
         otherwise) or prospects of the Company (or of the Company and its
         Subsidiaries taken as a whole) or on the rights or remedies of the
         Banks or any Agent under any Credit Document or on the ability of the
         Company and its Subsidiaries to perform their obligations to the Banks
         under any Credit Document."


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                  4.  Section 8 of the Credit Agreement is hereby amended by
inserting the following new Section 8.17 at the end thereof:

                  "8.17  Margin Regulations.  Except as provided in the second
         succeeding sentence, neither the Company nor any of its Subsidiaries
         shall acquire any Margin Stock (other than shares of Company Common
         Stock acquired in compliance with Section 9.03) if, after giving
         effect to such acquisition, the aggregate purchase price of all Margin
         Stock (other than shares of Company Common Stock held by the Company
         and its Subsidiaries) owned by the Company and its Subsidiaries
         exceeds $2,500,000. So long as the covenant contained in the
         immediately preceding sentence is complied with, all Margin Stock at
         any time owned by the Company and its Subsidiaries shall not
         constitute Collateral and no security interest shall be granted (or
         required to be granted) therein pursuant to any Credit Document. If at
         any time the aggregate purchase price of all Margin Stock owned by the
         Company and its Subsidiaries exceeds $2,500,000 (exclusive of shares
         of Company Common Stock held by the Company or any of its
         Subsidiaries), then (x) all Margin Stock owned by the Credit Parties
         (other than shares of Company Common Stock) shall be pledged, and
         delivered for pledge, pursuant to the respective Pledge Agreement (but
         only to the extent that the aggregate purchase price of such Margin
         Stock exceeds $2,500,000) and (y) the Company shall execute and
         deliver to the Banks appropriately completed forms (including, without
         limitation, Form U-1) establishing compliance with the Margin
         Regulations. If at any time any Margin Stock is required to be pledged
         as a result of the provisions of the immediately preceding sentence,
         repayments of outstanding Obligations may be required (and subsequent
         Credit Events may be restricted but only to the extent necessary) in
         order to be in compliance with the applicable provisions of the Margin
         Regulations."

                  5.  Section 9.02 of the Credit Agreement is hereby amended by
(i) deleting the word "and" appearing at the end of clause (xxiv) thereof, (ii)
deleting the period appearing at the end of clause (xxv) thereof and inserting
"; and" in lieu thereof and (iii) inserting in appropriate order the following
new clause (xxvi):

                  "(xxvi)  the Company (or its Subsidiary that is the fee owner
         of the Burbank Property) shall be permitted to agree to sell, and to
         consummate the sale of, the Burbank


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         Property so long as such sale is for fair market value (as determined
         in good faith by the Board of Directors of the Company) and results in
         consideration consisting of cash (it being understood and agreed that
         such consideration may consist of one or more promissory notes so long
         as such notes shall be due and payable in cash within 180 days after
         the issuance thereof), and notwithstanding anything to the contrary
         herein, the Net Sale Proceeds from the sale of the Burbank Property
         need not be applied in accordance with Section 3.03(e)."

                  6.  Section 9.03 of the Credit  Agreement is hereby amended by
adding the following new sentence immediately at the end thereof:

         "In addition to the purchases of Company Common Stock permitted
         pursuant to the preceding provisions of this Section 9.03, during the
         eighteen-month period commencing on September 1, 1998 and ending on
         March 1, 2000, the Company shall be permitted to purchase additional
         shares of Company Common Stock so long as (i) there shall exist no
         Default or Event of Default (both before and after giving effect
         thereto) and (ii) the aggregate purchase price of Company Common Stock
         acquired by the Company pursuant to this sentence in such
         eighteen-month period does not exceed $75,000,000."

                  7.  Section 9.05 of the Credit Agreement is hereby amended by
(i) deleting the word "and" appearing at the end of clause (xxi) thereof, (ii)
deleting the period appearing at the end of clause (xxii) thereof and inserting
"; and" in lieu thereof and (iii) inserting in appropriate order the following
new clause (xxiii):

                  "(xxiii)  the Company may purchase Company Common Stock to the
         extent permitted by Section 9.03."

                  8.  Section 11 of the Credit Agreement is hereby amended by
inserting in appropriate order the following new definitions:

         "'Burbank Property' shall mean those certain parcels of land (and the
         improvements thereon) located at 100 East Cedar Avenue, Burbank,
         California.

         `Information Systems and Equipment' shall mean all computer hardware,
         firmware and software, as well as other information processing
         systems, or any equipment containing


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         embedded microchips, whether directly owned, licensed, leased, operated
         or otherwise controlled by the Company or any of its Subsidiaries,
         including through third-party service providers, and which, in whole or
         in part, are used, operated, relied upon, or integral to, the Company's
         or any of its Subsidiaries' conduct of their business.

         'Margin Regulations' shall mean and include each of Regulation T,
         Regulation U and Regulation X.

         `Regulation T' shall mean Regulation T of the Board of Governors of
         the Federal Reserve System as from time to time in effect and any
         successor to all or a portion thereof.

         `Regulation X' shall mean Regulation X of the Board of Governors of
         the Federal Reserve System as from time to time in effect and any
         successor to all or a portion thereof.

         `Year 2000 Compliant' means, with respect to any Information Systems
         and Equipment, that such Information Systems and Equipment accurately
         process date data (including, but not limited to, calculating,
         comparing and sequencing), before, during and after the year 2000, as
         well as same and multi-century dates, or between the years 1999 and
         2000, taking into account all leap years, including the fact that the
         year 2000 is a leap year, and further, that when used in combination
         with, or interfacing with, other Information Systems and Equipment,
         shall accurately accept, release and exchange date data, and shall in
         all material respects continue to function in the same manner as it
         performs as of September 9, 1998 and shall not otherwise impair the
         accuracy or functionality of Information Systems and Equipment."

II.      Miscellaneous.

                  1.  In order to induce the Banks to enter into this Amendment,
the Company and the Canadian Borrower hereby represent and warrant that (i) all
representations and warranties contained in Section 7 of the Credit Agreement
(as amended by this Amendment) are true and correct in all material respects on
and as of the Sixth Amendment Effective Date and after giving effect to the
Amendment (unless such representations and warranties relate to a specific
earlier date, in which case such representations and warranties shall be true
and correct as of such earlier date) and (ii) there exists


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no Default or Event of Default on the Sixth Amendment Effective Date after
giving effect to this Amendment.

                  2.  This Amendment is limited as specified and shall not
constitute a modification, acceptance or waiver of any other provision of the
Credit Agreement or any other Credit Document.

                  3.  This Amendment may be executed in any number of
counterparts and by the different parties hereto on separate counterparts, each
of which counterparts when executed and delivered shall be an original, but all
of which shall together constitute one and the same instrument. A complete set
of counterparts shall be lodged with the Company and the Administrative Agent.

                  4.  THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW
OF THE STATE OF NEW YORK.

                  5.  This Amendment shall become effective on the date (the
"Sixth Amendment Effective Date") when each Credit Party (including without
limitation, the Company, the Canadian Borrower and each Subsidiary Guarantor)
and the Required Banks shall have signed a counterpart hereof (whether the same
or different counterparts) and shall have delivered (including, without
limitation, by usage of facsimile transmission) the same to the Administrative
Agent at its Notice Office. This Amendment and the agreements contained herein
shall be binding on the successors and assigns of the parties hereto.

                  6.  From and after the Sixth Amendment Effective Date, all
references in the Credit Agreement and each of the Credit Documents to the
Credit Agreement shall be deemed to be references to the Credit Agreement as
amended hereby.

                                  *     *     *


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                  IN WITNESS WHEREOF, the parties hereto have caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.


                                       COLTEC INDUSTRIES INC


                                       By /s/ Thomas B. Jones
                                          --------------------------------------
                                       Title:  Treasurer



                                       COLTEC AEROSPACE CANADA LTD.


                                       By /s/ Robert J.  Tubbs
                                          --------------------------------------
                                       Title:  Vice President


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                                       BANKERS TRUST COMPANY,
                                        Individually and as
                                        Administrative Agent

                                       By /s/ G. Andrew Keith
                                          --------------------------------------
                                       Title:  Vice President


                                       BANK OF AMERICA NATIONAL TRUST AND 
                                       SAVINGS ASSOCIATION
                                        Individually and as
                                        Documentation Agent

                                       By /s/ Michale J. Mullaney
                                          --------------------------------------
                                       Title:  Vice President


                                       THE CHASE MANHATTAN BANK,
                                        Individually and as
                                        Syndication Agent

                                       By /s/ 
                                          --------------------------------------
                                       Title:  Vice President


                                       BANK OF MONTREAL,
                                        Individually and as Canadian
                                        Paying Agent and Canadian
                                        Documentation Agent

                                       By /s/ Bruce A. Pietka
                                          --------------------------------------
                                       Title:  Director


                                       ALLIED IRISH BANK, PLC,
                                        CAYMAN ISLANDS BRANCH

                                       By /s/ William J. Strickland 
                                          --------------------------------------
                                          /s/ Tracey Duffy
                                          --------------------------------------
                                       Title:  Sr. Vice President
                                       Asst. Vice President


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                                       BANK COMMERCIALE ITALIANA
                                        NEW YORK BRANCH

                                       By /s/ C. Dougherty
                                          --------------------------------------
                                       Title:  V.P.

                                       By /s/ Karen Purelis
                                          --------------------------------------
                                       Title:  V.P.


                                       BANK OF IRELAND

                                       By /s/ 
                                          --------------------------------------
                                       Title:  Corporate Officer


                                       THE BANK OF NEW YORK

                                       By /s/ Ann Marie Hughes
                                          --------------------------------------
                                       Title:  Vice President


                                       BANK OF TOKYO-MITSUBISHI TRUST
                                        COMPANY

                                       By /s/ Freidrich N. Wilmar
                                          --------------------------------------
                                       Title:  Vice President


                                       NATEXIS BANQUE BFCE, formerly
                                        BANQUE FRANCAISE DU COMMERCE
                                        EXTERIEUR

                                       By /s/ 
                                          --------------------------------------
                                       Title: /s/

                                       By /s/ G. Kevin Dooley
                                          --------------------------------------
                                       Title:  Vice President


                                       CIBC INC.

                                       By /s/ Thor Zaluckyj
                                          --------------------------------------
                                       Title:  Executive Director
                                       CIBC Oppenheimer Corp., as AGENT


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                                       ROYAL BANK OF CANADA

                                       By
                                          --------------------------------------
                                       Title:


                                       COMMERCIAL LOAN FUNDING TRUST I
                                       By Lehman Commercial Paper Inc.,
                                         not in its individual capacity but 
                                       solely as
                                         administrative agent.

                                       By /s/ Michale Swanson
                                          --------------------------------------
                                       Title:  Authorized Signatory


                                       MELLON BANK CANADA

                                       By /s/
                                          --------------------------------------
                                       Title:  Vice President


                                       CREDIT LYONNAIS ATLANTA AGENCY

                                       By /s/ David M. Caunn
                                          --------------------------------------
                                       Title:  First Vice President


                                       CREDIT LYONNAIS NEW YORK
                                        BRANCH

                                       By /s/ Robert Ivosevich
                                          --------------------------------------
                                       Title:  Senior Vice President


                                       THE DAI-ICHI KANGYO BANK, LTD.

                                       By /s/
                                          --------------------------------------
                                       Title:  Account Officer


                                      FIRST UNION NATIONAL BANK
                                       (f/k/a First Union National
                                       Bank of North Carolina)

                                       By /s/ Patrick D. Finn
                                          --------------------------------------
                                       Title: Senior Vice President


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                                       THE FUJI BANK, LIMITED,
                                        ATLANTA AGENCY

                                       By /s/ Toshihiro Mitsui  
                                          --------------------------------------
                                       Title:  Senior Vice President &
                                       Joint General Manager


                                       ERSTE BANK DER
                                        OESTERREICHISCHEN SPARKASSEN 
                                        AG (f/k/a Girocredit Bank AG
                                        Der Sparkassen,
                                        Grand Cayman Island Branch)

                                       By /s/ Arcinee Hovanessian
                                          --------------------------------------
                                       Title:  Vice President - Erste Bank 
                                       New York

                                       By /s/ Paul Judicke
                                          --------------------------------------
                                       Title:  Vice President - Erste Bank
                                       New York


                                       THE INDUSTRIAL BANK OF JAPAN,
                                         LIMITED

                                       By /s/ Kenji Tsugami
                                          --------------------------------------
                                       Title:  General Manager

                                       LLOYDS BANK PLC

                                       By /s/ David C. Rodwky
                                          --------------------------------------
                                       Title:  Assistant Vice President
                                       R156

                                       By /s/ Mela Dorgan
                                          --------------------------------------
                                       Title:  Assistant Vice President
                                       Structured Finance D094

                                       MELLON BANK, N.A.

                                       By /s/ M. Johnst
                                          --------------------------------------
                                       Title:  AVP


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                                       NATIONSBANK, N.A.

                                       By /s/ 
                                          --------------------------------------
                                       Title:  Senior Vice President


                                       BANK LEUMI TRUST COMPANY
                                         OF NEW YORK

                                       By /s/ Sami Ambar
                                          --------------------------------------
                                       Title:  Vice President


                                       THE SUMITOMO BANK, LIMITED

                                       By /s/ John C. Kissinger
                                          --------------------------------------
                                       Title:  General Manager


                                       THE TOKAI BANK, LIMITED
                                        NEW YORK BRANCH

                                       By /s/ 
                                          --------------------------------------
                                       Title:  Assistant General Manager


                                       WACHOVIA BANK, N.A.

                                       By /s/ Timothy R. Hileman
                                          --------------------------------------
                                       Title:  Senior Vice President


                                       BT BANK OF CANADA

                                       By /s/ James E. Kellar
                                          --------------------------------------
                                       Title:  Principal

                                       By /s/ Brian S. Strauss 
                                          --------------------------------------
                                       Title:  Principal


                                       BANK OF AMERICA CANADA

                                       By /s/
                                          --------------------------------------
                                       Title: /s/


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                                       THE CHASE MANHATTAN BANK OF
                                        CANADA

                                       By /s/ Christine Chan
                                          --------------------------------------
                                       Title:  Vice President

                                       By /s/ Arun K. Bery  
                                          --------------------------------------
                                       Title:  Vice President


                                       CREDIT LYONNAIS CANADA

                                       By /s/ Robert Dyck
                                          --------------------------------------
                                       Title:  Manager, Corporate Banking

                                       By /s/ David J. Farmer
                                          --------------------------------------
                                       Title:  First Vice President and
                                       Manager, Central Region


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Acknowledged and agreed:
AMI INDUSTRIES INC.
CII HOLDINGS INC
COLTEC CANADA INC
COLTEC INDUSTRIAL PRODUCTS INC
COLTEC INTERNATIONAL SERVICES CO
COLTEC NORTH CAROLINA INC.
COLTEC TECHNICAL SERVICES INC
DELAVAN INC (F/K/A DELAVAN NEWCO INC.)
GARLOCK INC
GARLOCK INTERNATIONAL INC
GARLOCK OVERSEAS CORPORATION
HABER TOOL COMPANY INC
JAMCO PRODUCTS, LLC
MENASCO AEROSYSTEMS INC
STEMCO INC
WALBAR INC


By /s/ Robert J. Tubbs
   ----------------------------------
   Title:  Vice President
   On behalf of each of the above
   Subsidiary Guarantors