EXHIBIT 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

   We consent to the incorporation by reference in (a) Amendment No. 3 to the
Registration Statement (Form S-3, No. 33-56610) pertaining to shares of common
stock of IMPCO Technologies, Inc. and in the related Prospectus, (b) Amendment
No. 1 to the Registration Statement (Form S-8, No. 33-38649) pertaining to the
1989 Incentive Stock Option Plan of IMPCO Technologies, Inc. and in the related
Prospectus, (c) the Registration Statement (Form S-8, No. 33-72008) pertaining
to the 1991 Executive Stock Option Plan of IMPCO Technologies, Inc. and in the
related Prospectus, (d) the Registration Statement (Form S-8, No. 33-37035)
pertaining to the 1996 Incentive Stock Option Plan of IMPCO Technologies, Inc.,
(e) the Registration Statement (Form S-8, No. 33-62889) pertaining to the IMPCO
Investment and Tax Savings Plan and, (f) Amendment No. 2 to the Registration
Statement (Form S-3, No. 333-63726) pertaining to shares of common stock of
IMPCO Technologies, Inc. and in the related Prospectus of our report dated May
31, 2001, except for Note 13, as to which the date is June 14, 2001 with
respect to the consolidated financial statements and financial statement
schedule of IMPCO Technologies, Inc. included in this Annual Report (Form 10-K)
for the year ended April 30, 2001.

                                        /s/ Ernst & Young, LLP

Long Beach, California
July 27, 2001