EXHIBIT 5.1

                       DANZIG KAYE COOPER FIORE & KAY, LLP
                                30A Vreeland Road
                                   PO Box 333
                         Florham Park, New Jersey 07932

January 5, 2004

EnerTeck Corporation
10701 Corporate Drive, Suite 150
Stafford, Texas 77477

Re:   Registration Statement on Form SB-2

Ladies and Gentlemen:

You have requested our opinion as counsel for EnerTeck Corporation, a Delaware
corporation (the "Company"), in connection with the registration under the
Securities Act of 1933, as amended, and the rules and regulations promulgated
thereunder, of 7,675,650 shares of the Company's common stock currently
outstanding or which may be acquired upon exercise of warrants (the "Shares").

In connection therewith, and arriving at the opinion as expressed below, we have
examined and relied upon originals or copies, certified or otherwise identified
to our satisfaction, of the Company's Certificate of Incorporation as amended,
By-laws of the Company, the Registration Statement on Form SB-2 in the form to
be filed with the Securities and Exchange Commission (the "Registration
Statement") and such other documents as we have deemed necessary or appropriate
as a basis for the opinion expressed herein.

In connection with our examination, we have assumed the genuineness of the
signatures, the authenticity of all documents tendered to us as originals, the
legal capacity of natural persons and the conformity to original documents of
all documents submitted to us as certified, conformed, photostatic or facsimile
copies.

Based on the foregoing, and subject to the qualifications and limitations set
forth herein, we are of the opinion that (i) the Shares subject of the
Registration Statement which are currently outstanding are, and (ii) the Shares
subject of the Registration Statement issuable upon exercise of warrants, when
issued, delivered and paid for as contemplated in the prospectus forming a part
of the Registration Statement, will be, legally issued, fully paid and
non-assessable.



EnerTeck Corporation
January 5, 2004
Page 2

We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to our firm under the caption "Legal
Matters" in the prospectus forming a part of the Registration Statement.

This opinion is to be used solely for the purpose of the registration of the
Shares and may not be used for any other purpose.

Very truly yours,


DANZIG KAYE COOPER FIORE & KAY, LLP