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  1. #1


    SN95 Supporting Member justi88's Avatar
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    Oil pump failing... knocking sound

    A few days ago my pressure gauge has been acting loko, i can hear a really loud knocking inside the engine when the oil gauge is on minimum but when the gauge goes back up the noise goes away... i have noticed the car looses power when the knocking appears... i have drove it like this until yesterday but wont drive it again until i get it fixed, im afraid i can damage the engine. Could this be an issue with the oil pump or can it be more serious?



  2. #2


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    Dude stop driving the car right now, if you are hearing a knocking sound when ever the gauge goes low it means that your oil pressure is indeed going down and the knocking is probably ur rod bearings banging agains the crankshaft since theres no oil to fill the gap, its the same knocking sound u hear when ever u have changed the oil and theres no oil pressure for a few seconds. If i were you i would take the car to a shop and have it checked , most likely u have oil pump problems.

  3. #3


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    start saving for a new motor.... it wont be long.

    95 Gt Vert a.k.a The Pig N/A 347 coming soon
    95 Cobra coupe Rotrex Supercharged
    09 Pontiac G8 GT The new victim...http://socalhorsepower.com/

  4. #4


    Senior Member Saint's Avatar
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    Quote Originally Posted by 94RedGt View Post
    Dude stop driving the car right now, if you are hearing a knocking sound when ever the gauge goes low it means that your oil pressure is indeed going down and the knocking is probably ur rod bearings banging agains the crankshaft since theres no oil to fill the gap, its the same knocking sound u hear when ever u have changed the oil and theres no oil pressure for a few seconds. If i were you i would take the car to a shop and have it checked , most likely u have oil pump problems.
    +100

    And + 1000 on the saving

    When my oil pump started that I changed the oil then the sensor and cleaned the screen....Not long after I was buying a new motor.

    I'd replace the pump, or get it towed to have someone else replace the pump and also do a compression test to be on the safe side


    I love driving slow and then someone rolls up trying to race....and I just keep doing the speed limit.

    Saint's Sig Pic Thread

  5. #5


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    Yeah like i said do not drive it, dont mistake the gauge going crazy for a faulty sender , if you do indeed hear what sounds like a knock then the pump its dying or the pickup is getting cloged with slush and oil is not able to go around the engine. Take it to the shop and you are maybe going to have to drop the oilpan and that prolly means dropping the entire kmember so if u were planning on a kmember swap then now is the time lol. We are lucky 5.0s are plentyful and cheap. If you have not been driving the car for long and the knocking only happens for a second then your prolly gonna be ok and wont have serious damage.

  6. #6


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    I hate to ask stupid questions... but often times they need to get asked.

    Have you checked your oil level?

  7. #7


    SN95 Supporting Member justi88's Avatar
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    its weird this all happened after i changed the oil this weak, i checked the oil again right now and its a little above the normal measure, i talked with a good mechanic here and he said the same thing as 94Redgt that it could be an issue with the bearings. I have thought of getting a engine already but i live overseas, ive seen some engines on ebay, should i first change the pump and see if thats the issue?

  8. #8


    SN95 Supporting Member justi88's Avatar
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    come on no advice from anyone??

  9. #9


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    yeah change the pump and see what happens... its less expensive than a motor. But you WILL be buying one soon enough. As crappy as the oil pressure guage is in these cars, if it starts moving like it was in your car, chances are the bearings are wiped out. So if you can change the pump cheaply, go ahead. if not, spend the money for a nice new one to go in the next motor.

    95 Gt Vert a.k.a The Pig N/A 347 coming soon
    95 Cobra coupe Rotrex Supercharged
    09 Pontiac G8 GT The new victim...http://socalhorsepower.com/

  10. #10


    SN95 Supporting Member justi88's Avatar
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    Alright, im taking it to the shop on monday and ill see whats the problem, ill keep you all posted on the situation with my car

 

 

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