Engine Block - Oil Leakage

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FILE IN S.I. Man. VOL. I

SEC. 2 PG. 184
Service Information

SUBJECT: OIL LEAKAGE AT CYLINDER BLOCK ISSUE: 08/85-778 M85 8 VALVE AND 16 VALVE 900


There is a risk of casting porosity and subsequently an oil leak at the blanked off holes on 1985 engine blocks just below the starter motor. These holes are for gearbox mountings when the block casting is to be used for a 9000.

Porosity may occur on vehicles produced with Engine Serial Nos. from F000001-FO90111. From Engine No. F090112, engine blocks are vacuum tested and if necessary, sealed by plugging the holes. A similar repair can be made to earlier vehicles which experience oil leaks.

Sealing Plug P/N 80-07-619



Modification Details:

1. Clean all traces of oil from the threaded holes.

2. Apply Loctite 242 (blue) to the plug threads and install in the block. Tighten to 7 ft.lbs. (9.6 N-m).
Warranty Information: For warranty repairs, use Failure code 21211-05-3-01-05. Labor allowance is 0.4 hour which is to be entered on the claim as straight time.