<PAGE>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
(RULE 13d-102)
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 7)
IMPCO Technologies, Inc.
----------------------------------------------------------------------------
(Name of Issuer)
Common Stock
----------------------------------------------------------------------------
(Title of Class of Securities)
45255W 10 6
----------------------------
(CUSIP Number)
1
<PAGE>
- ----------------------------
CUSIP NO. 45255W 10 6 13G
- ----------------------------
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. (ENTITIES ONLY)
Rawley F. Taplett
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(See Instructions)
(a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.
- --------------------------------------------------------------------------------
1 SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH 586,732
REPORTING
PERSON WITH
- --------------------------------------------------------------------------------
2 SHARED VOTING POWER
- --------------------------------------------------------------------------------
3 SOLE DISPOSITIVE POWER
586,732
- --------------------------------------------------------------------------------
4 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
5 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
586,732
- --------------------------------------------------------------------------------
6 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(See Instructions)
- --------------------------------------------------------------------------------
7 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
8.06%
- --------------------------------------------------------------------------------
8 TYPE OF REPORTING PERSON (See Instructions)
IN
- --------------------------------------------------------------------------------
2
<PAGE>
ITEM 1(a) NAME OF ISSUER: IMPCO Technologies, Inc.
Item 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
16804 Gridley Place
Cerritos, CA 90703
ITEM 2(a) NAME OF PERSON FILING: Rawley F. Taplett
ITEM 2(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
P.O. Box 2188
Wenatchee, WA 98801
ITEM 2(c) CITIZENSHIP: U.S.
ITEM 2(d) TITLE OF CLASS OF SECURITIES: Common Stock
ITEM 2(e) CUSIP NUMBER: 45255W 10 6
ITEM 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b),
check whether the person filing is a:
(a) / / Broker or Dealer registered under Section 15 of the Act;
(b) / / Bank as defined in Section 3(a)(6) of the Act;
(c) / / Insurance Company as defined in Section 3(a)(19) of the
Act;
(d) / / Investment Company registered under Section 8 of the
Investment Company Act;
(e) / / Investment Advisor registered under Section 203 of the
Investment Advisers Act of 1940;
(f) / / Employee Benefit Plan, Pension Fund which is subject to
the provisions of the Employee Retirement Income Security Act of
1974, or Endowment Fund; SEE Rule 13d-1(b)(1)(ii)(F);
(g) / / Parent Holding Company, in accordance with Rule
1d-1(b)(ii)(G) (NOTE, SEE ITEM 7.);
(h) / / Group, in accordance with Rule 13d-1(b)(1)(ii)(H).
3
<PAGE>
ITEM 4. OWNERSHIP.
If the percent of the class owned, as of December 31, of the year covered
by the statement, or as of the last day of any month described in Rule
13d-1(b)(2), if applicable, exceeds five percent, provide the following
information as of that date and identify those shares which there is a right to
acquire.
(a) Amount beneficially owned:
586,732
(b) Percent of class:
8.06%
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote
586,732
(ii) Shared power to vote or to direct the vote
Not Applicable
(iii) Sole power to dispose or to direct the disposition of
586,732
(iv) Shared power to dispose or to direct the disposition of
Not Applicable
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following / /.
INSTRUCTION. Dissolution of a group requires a response to this item.
4
<PAGE>
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not Applicable
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
Not Applicable
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not Applicable
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not Applicable
ITEM 10. CERTIFICATION.
Not Applicable
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.
February 12, 1998
-----------------------------------
(Date)
/s/ Rawley F. Taplett
-----------------------------------
(Signature)
Rawley F. Taplett
-----------------------------------
(Name and Title)
5
