Close
why do i have a loud knocking from the engine when i accelerate?
1999 Pontiac Grand Am

Why do i have a loud knocking from the engine when i accelerate?

(1999 Pontiac Grand Am)
i was getting on the freeway yesterday and i started hearing knocking in the front of the car. my grandpa looked at it i told him that my oil light has been on for a while but i was told it was okay cause its an old car. he checked the oil an i had barely anything. he put oil in it but only 2 quarts and when i accelerate it still makes a loud knocking in my engine. what could this be?
in Cleveland, OH on May 16, 2016
Ask a Question
1 answer & 0 comments
Popular Answer
on May 16, 2016
It's likely a failed 'connecting rod bearing' if it only knocks when accelerating .. Car savvy person or mechanic can remove plug wires 'one at a time' while engine is running .. If knocking gets quieter or goes away .. Rod bearing failure is confirmed .. on that particular cylinder .. Repair requires engine removal for disassembly to install a crankshaft kit or the engine may need to be replaced... Oil pan removal for bearing inspection is the best way to check the extent of damage .. Good luck with it!
Sign in to reply
Oil Leak Diagnosis
$88 - $111 Learn More
on May 16, 2016
It's likely a failed 'connecting rod bearing' if it only knocks when accelerating .. Car savvy person or mechanic can remove plug wires 'one at a time' while engine is running .. If knocking gets quieter or goes away .. Rod bearing failure is confirmed .. on that particular cylinder .. Repair requires engine removal for disassembly to install a crankshaft kit or the engine may need to be replaced... Oil pan removal for bearing inspection is the best way to check the extent of damage .. Good luck with it!
Sign in to reply

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Consumes hella gas hella fast. i filled it up with 40 and it wasted within 1 hour 15 min drive. 2003 pontiac grand...
We got the idea that there’s too much air built up that won’t let the heat work in the cabin, just constantly blows...