Exhibit 31.2


Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of
                               2002


I, Marliss D. Johnson, certify that:

1.   I have reviewed this Form 10-Q of Ampco-Pittsburgh
     Corporation;

2.   Based on my knowledge, this report does not contain any untrue
     statement of a material fact or omit to state a material fact
     necessary to make the statements made, in light of the
     circumstances under which such statements were made, not misleading
     with respect to the period covered by this report;

3.   Based on my knowledge, the financial statements, and other
     financial information included in this report, fairly present in
     all material respects the financial condition, results of
     operations and cash flows of the registrant as of, and for, the
     periods presented in this report;

4.   The registrant's other certifying officer(s) and I are
     responsible for establishing and maintaining disclosure controls
     and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-
     15(e)) and internal control over financial reporting (as defined in
     Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant and
     have;

       (a) Designed such disclosure controls and procedures, or caused
           such disclosure controls and procedures to be designed under our
           supervision, to ensure that material information relating to the
           registrant, including its consolidated subsidiaries, is made known
           to us by others within those entities, particularly during the
           period in which this report is being prepared;

      (b)  Designed such internal control over financial reporting, or
           caused such internal control over financial reporting to be
           designed under our supervision, to provide reasonable assurance
           regarding the reliability of financial reporting and the
           preparation of financial statements for external purposes in
           accordance with generally accepted accounting principles;

      (c)  Evaluated the effectiveness of the registrant's disclosure
           controls and procedures and presented in this report our
           conclusions about the effectiveness of the disclosure controls and
           procedures, as of the end of the period covered by this report
           based on such evaluation; and

      (d)  Disclosed in this report any change in the registrant's
           internal control over financial reporting that occurred during the
           registrant's most recent fiscal quarter (the registrant's fourth
           fiscal quarter in the case of an annual report) that has materially
           affected, or is reasonably likely to materially affect, the
           registrant's internal control over financial reporting; and

5.   The registrant's other certifying officer(s) and I have
     disclosed, based on our most recent evaluation of internal control
     over financial reporting, to the registrant's auditors and the
     audit committee of the registrant's board of directors (or persons
     performing the equivalent functions):

       (a) All significant deficiencies and material weaknesses in the
           design or operation of internal control over financial reporting
           which are reasonably likely to adversely affect the registrant's
           ability to record, process, summarize and report financial
           information; and

      (b)  Any fraud, whether or not material, that involves management
           or other employees who have a significant role in the registrant's
           internal control over financial reporting.


s/Marliss D. Johnson
Marliss D. Johnson
Vice President, Controller, Treasurer
August 3, 2005