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Discussion Starter #1
Hi guys,
I think I have a f*cked motor. It sounds like spun bearing or rod knock

The motor was a used JDM motor swapped in not long ago
Finally got everything together to tune on AEM V2

Car with ZERO boost wastegate disconnected on STOCK twins
I repeat NO BOOST

After a few WOT runs it developed this noise.
Sounds like its coming from the head.

Car drove less then 500 feet after noise was noticed.
Idled up just for this video thats about it.

Would it be okay to just replace the bearings?

Does this sound like rod knock to you?

videos here

http://youtu.be/iZJe0A_ALeI

and

http://youtu.be/D3zKCa6CI00


much appreciated
thanks!
 

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In case you have a rod knock which is already audible, I personally would always have the crank polished and possibly rebalanced ( if this is enough to compensate the damage, if not do a regrind to undersize)

Replacing just the bearings might work, but not for long.

If purchasing a used engine, I would spend always some new bearings prior to install it into your car, just for safety reasons.
 

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It does sound like rod knock to me, sorry man.

Drain your oil into into a flat container and look for shiny particles, and/or cut open your oil filter and look for the same.


As mentioned, get an expert to check the crank for damage.
 

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Discussion Starter #5
Kurt, At idle it does not make the noise only around 2000rpm or so.

Do you still think this would be a VVTi problem?

At idle i am sitting at 15 degrees of timing. fully warmed up
 

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What i did to confirm it was rod knock in my camry 5sfe was to take off one coil to each cylinder at a time and start the engine each time. The cylinder with the spun bearing will definitely be more quiet at idle and gradually get louder as you up the throttle.
 

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Raising this from the dead...lol but did you ever find out the issue?

Kurt, At idle it does not make the noise only around 2000rpm or so.

Do you still think this would be a VVTi problem?

At idle i am sitting at 15 degrees of timing. fully warmed up
 
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