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1999 Pontiac Grand Prix GTP 3.8L #4 Cyl
Posted to GM Engine on 11/2/1999

Have couple of questions: 1) Have broken piston at upper ring land area in #4 cylinder. Unsure of cause- only see ground aluminum. No sign of detonation, all other cyls look normal. Cust states knock started under heavy accel. May possible be loose part fr...

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Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GTP

VIN 1G2WR5210X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
Affected#4 Cyl
ConditionsBroken Piston
Misc.Supercharged Gtp
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GTP

VIN 1G2WR5210X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
Affected#4 Cyl
ConditionsBroken Piston
Misc.Supercharged Gtp