The timing marks on the crank/cam sprokets are they to be lined up at number four TDC or #1 TDC.

1995 GMC JIMMY
148,000 MILES
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the haynes manual says to set at number four cylinder TDC to line up the timing marks on the sprockets. Because i know it did not line up and that the haynes manual is wrong most the time, i have to ask. This is a 95 gmc jimmy 2dr 2wd. 4.3 vortec vin W.I have looked for at least ten hours on the computer and still do not have a answer. The dealer cannot help assuming a liability issue. thank you.
Nov 30, 2011 at 4:24 PM
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#1 TDC. See image.
Nov 30, 2011 at 5:33 PM
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the haynes manual and auto-zones computer both say number four, chlton is made by the same company i believe. thank you. I will never understand why simple information is so hard to find.

Nov 30, 2011 at 6:33 PM
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Timing is NEVER done on cylinder #4. ALWAYS #1.
Dec 1, 2011 at 3:18 AM