Citation II L4-151 2.5L VIN R TBI (1984)
Oil Filter: All Technical Service Bulletins
Engine - Oil Filter Bypass Valve/Reinstall or Replace
85-30
6A (VI)
Feb., 1985
Subject:
OIL FILTER BYPASS VALVE 2.5L L4 ENGINE
Model and Year:
1980-85 VEHICLES EQUIPPED WITH 2.5L L4 ENGINE (VIN CODE R)
TO:
ALL CHEVROLET DEALERS
OIL FILTER BYPASS VALVE
Re-released to update vehicles affected. Previously released as 83-I-99.
Whenever a repair requires replacement of the engine block, it will be necessary to remove the oil filter bypass valve assembly and reinstall it in the new
block. If a new oil filter bypass check valve assembly is required, it will be necessary to order P/N 25010497 through WDDGM (refer to the illustration
below).
