1994 Pontiac Grand Am Possible jump time, broken timing ch

Tiny
HELEENA
  • MEMBER
  • 1994 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 137,000 MILES
Looking for probable cost of replaciing timing chain. The car ran great until we were going down the freeway at about 72 (normal speed). Car seemed to jump up in the front then stopped running. All lights came on on the console. Didn't run out of gas.
Oil looks great! No broken belts. Car restarts but a banging sound in the front of the drivers area of the motor.
Possible jump in timing or broken chain. So wonder what it costs to have repaired or how hard to change ourselves.
Thank You
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Monday, April 5th, 2010 AT 1:48 AM

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Tiny
JACK42
  • MEMBER
First you should have a leak down test done on the cylinders to see if anything hit internally (valves)At that engine speed you could have hit a valve or two, which even with a new timing chain wont run right. The labor guide pays 5.8 hours to replace the chain, which includes removing the oil pan to clean the plastic gears out. Its alot of work to do in the driveway, but not impossible
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Tuesday, April 6th, 2010 AT 12:49 PM

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