97 pontiac grand am motor knocking?

[dreams_wishes21]

ok my motor is knocking but when i accelerate the knocking goes away and when i decelerate it comes right back what could the knocking be ? plz help ......4clyd. twin cam
1997 pontiac grand am gt
and if you have a clue of what it could plz explain if you can how to change it and how much it could cost

plz and thank you

 

[dodge man]

that could be caused by several different things, so since we cant hear or see the engine running you will have to determine where the knock is coming from,like a rod knock or lifter noise then we can help you with it,its impossible to tell you anything without hearing it running,low oil pressure will cause one to knock a certain times so that might be something you want to check out,good luck.

 

[69charger]

check engine oil and make sure it is at right level. If it is try changing the oil and putting a little higher grade oil. If you use 5w-30 use 10w-30 in it instead. It worked for my chevy lumina.

 

[Rick]

The twin cams are know for being junk sounds like a lower end noise i'd keep Driving it untill it got real bad. Gonna need a new motor sometime prolly to fare gone to fix it now without getting another motor

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[renegadesail]

Crankshaft main bearing going out. If you keep driving it will get worse. 90% of the time when a crank bearing goes bad, it will score the crank journal. Were taking major bucks to repair. This year model car is not worth the cost of repairing. You can get a few more miles out of this car by changing to a 50 or 60 weight oil. I've worked on a lot of engines and overhauled many. I wouldn't drive this car very far, it could leave you stranded.