Thread: 1 hour of run time and the engine knocks!!!

This is what the bearings look like after and 1 hour max idle tuning.

Are ACL bearings STD oversized?
This is happens to 3 motors already.

I'm using 54c rods/pistons.
Stock sr20ve bottom end
ACL STD rod bearings
OEM VE main bearings.

Any ideas?

Mods please move to right section.
Thanks.

54C rods, aren't those from the GTiR DET?

If so, which version of the ACL bearings did you use? The regular SR20DE(T) bearings or the GTiR DET ones?

Also, which crank?

I used the 19mm ones (gtir)

And which crankshaft?

Stock VE

Hmm, I might have mixed up a few things, I always thought the GTiR rods and crank were 2 mm bigger in diameter, but it looks like it's just 2 mm wider. And that should work.

Anyways, wouldn't it be a possibility that they were too small in diameter? That you would've needed an oversized bearing instead of STD?

ACL Race Series - Nissan SR20DET Turbo Performance Engine Bearings

I'm using ACL 19mm

You didn't clean your crank well enough IMO, there was still gunk left in the oil passages.

Yea looks like a thousandths was taken off from foreign matter.

I highly believe the Rods are not true.