99 Pontiac Grand am se head gasket repair 3.4

Asked by Feb 18, 2017 at 11:43 PM about the 1999 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

Car won't start after repair is complete just
back fires do you know what would cause
that problem

2 Answers

87,035

Possible the timing marks are not lined up on the crankshaft gear and the camshaft gear. When you re-install the timing chain your suppose to rotate the engine by hand 2 revolutions to make sure the timing marks line back up.

1 people found this helpful.
81,335

You also need to check where the timing marks are supposed to be. On some engines it's 12 o'clock on both the crankshaft and camshaft sprockets. On others it's crankshaft 12 o'clock and camshaft 6 o'clock. HTH. -Jim

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