JRally

Found this in the oil pan of a stock bottom end 4g63, 2005 evo 8.

Set the razor blade next to it for size reference.

Wrist pins are press fit, so any idea what it is?

4b11slayer

Holy crap.

Looks like a wrist pin clip

I dont know anything else that uses a snap ring in a 4g63

JRally

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Its very small tho. Like the size of a dime.

Im starting to think foreign object dropped in the head and made it thru an oil galley

4b11slayer

ive never seen a stock wrist pin from a evo but they arent too big ine the motors ive seen.

4b11slayer

How did you find it? Drop the pan or drain oil?

JRally

But 4g63 are press fit, no clips.

Drop the pan. Found it in the bottom.

MinusPrevious

iTrader: (3)

Looks like just the drain plug crush washer

4b11slayer

Oh ok good so its not from the wrist pin.

Maybe its been there for a while

JRally

Don't think so, the outer diameter would be wider.

JRally

Maybe. I dropped the pan to inspect bearings because the motor has a noise on throttle that seems similar to developing rod knock. The bearings looked great, but I found this when cleaning the pan to reassemble it.

4b11slayer

Maybe the noise is related. Maybe the block has pistons and does take a wrist pin clip or is it 100 percent stock that you know of?

JRally

Its a completely stock head, stock turbo, stock intake manifold.

Rods are definitely stock too. I'd be shocked if someone did pistons only.

4b11slayer

What kind of noise are you hearing?

JRally

Hard to describe. Metal on metal repetitive clicking like my rod knock sounded in my own car, but the bearings checked out. Checked timing tensioner for dead spots, replaced it anyways. Maybe balance shaft bearings. Sounds under the intake manifold.

barneyb

This piece is steel, not rubber?