Question about 1990 GMC Safari
GM Astro/Safari 1985-1996 - Timing Chain Repair Guide
REMOVAL & INSTALLATION
(see Figures 1, 2, 3, 4, 5, 6, 7 and 8)
Fig. 1: Exploded view of a typical 4.3L engine timing chain and gear assembly-use of studs may vary
Fig. 2: Align the timing marks closest together (No. 4 TDC) before starting-NOTE that No. 1 TDC would be aligned, but with both timing marks at top of their travel
Fig. 3: Remove the timing cover, then turn the crankshaft as necessary to align the timing markI lost the timing spot - 9c633ea.jpg/>
Fig. 4: Loosen and remove the camshaft sprocketI lost the timing spot - 0228116.jpgbolts...
Fig. 5: ...then remove the cI lost the timing spot - 692c909.jpgocket along with the timing chain
FI lost the timing spot - 9b76ae5.jpgecessary, use a suitable puller to remove the crankshaft sprocket
Fig. 7: GM crankshaft sprocket removal tool
Fig. 8: Use the GM installation tool (or a suitable driver) to install the crankshaft sprocket
The 4.3L engine is the only engine covered by this guide which uses a timing chain and gear (sprocket) assembly to turn the camshaft. The 2.5L engine uses a direct gear drive (without a chain).
The following procedure requires the use of the Crankshaft Sprocket Removal tool No. J-5825-A or equivalent, and the Crankshaft Sprocket Installation tool No. J-5590 or equivalent.
Hope help you whit this information. Good luck.
Posted on Sep 11, 2009
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Posted on Jan 02, 2017
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