Can overfilling oil cause engine knock

Joined Jun 10, 2012

1 Posts

Discussion Starter · #1 · Jun 11, 2012

hi folks new to this forums website so hopeing u guys can help me out of a pickle
iv overfilled my car engine with 10 40 oil and didnt use the car till the next
day.as I started the car I had and had no ptoblems till I drove for atleast 2 mins down
the road which is wen out of no where came this huge loud knocking cumming from me engine.... left it to warm up and still the loud noise continues :-( and seems to get faster wen I accelerate..... any ideas as to what could b the problem and how
I can fix it would b greatfully appreciated

Joined Apr 26, 2012

8,008 Posts

How much have you overfilled and have you drained it off?

DON'T DRIVE ANYMORE

The loud noise is damage occurring to the engine internals.

Joined Jul 22, 2009

7,188 Posts

agreed. drain the oil and fill to the correct level before you use the car again, too much oil can be as bad as too little

Joined Mar 16, 2011

8,981 Posts

oh dear, plus 1 the above comments... x

Joined Nov 24, 2009

4,952 Posts

Overfilling causes the crank to dip into the oil, this churns it (it mixes with air creating foam) - in turn too much oil pressure which can cause damage to the bearings, rods, crank etc as the pump won't function properly and there's too much aeration in the oil.

Drop the oil, fill the correct amount and hope for the best

Joined Aug 8, 2012

1 Posts

help meh!

so i did the same thing by overfilling my oil. I had it drained and filled to the correct level, but the knocking hasn't stopped. The garage told me it would go away shortly, but on my drive home my car started playin up and seems like the noise has gotten louder? What should I do?

Joined Dec 9, 2020

1 Posts

Overfilling causes the crank to dip into the oil, this churns it (it mixes with air creating foam) - in turn too much oil pressure which can cause damage to the bearings, rods, crank etc as the pump won't function properly and there's too much aeration in the oil.
Drop the oil, fill the correct amount and hope for the best

Hey so i did this i drained it after about 5 minutes. I went to deivw it again and it starts banging. Any idea of whats wrong.

Will too much oil cause the engine to knock?

92VR4Red

07-22-2004, 05:02 PM

my engine on my step dads fire bird is knocking... and we where messing around with it and when we checked the oil it lookedto be 2 or 3 qrts too high... would that be the problem??

Rod&Custom

07-22-2004, 05:30 PM

Uhhhh, 2 or 3 quarts? :disappoin Yea, something is going to happen, if not just a mess.

SphinXX

07-26-2004, 06:35 AM

No, 3 quarts will not cause the engine to knock. Depending on the engine and oil pan size most engines will run with that much over. Some if over filled simply will not start. Having that much over in oil will only cause the oil pressure to build so high that you will start to blow seal through out your engine, thus needing the engine to be pulled out and torn down. Might as well rebuild it since you are doing that.

Maifirehawk

07-26-2004, 05:41 PM

Too much oil will make the engine sounds like knock, the Rod Journals hit the oil and making knocking sound, not to mention the fact that it will making air pockets (bubbles) in your bushings and cause the engine to Overheat.

Mai
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