Big End Bearing breaking up

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Ben_Copeland

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posted on 19/7/13 at 03:44 PM

Big End Bearing breaking up

Friend of mine just sent me this.

That's from a z20let. Vauxhall turbo engine.

What's caused that? Not seen them break up like that before !

[Edited on 19/7/13 by Ben_Copeland]

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britishtrident

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posted on 19/7/13 at 04:39 PM

Hmm................ new one on me

My vote is for is a combination of the bearing being over loaded and and manufacturing flaw.

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posted on 19/7/13 at 08:21 PM

quote:
Originally posted by Ben_Copeland
Friend of mine just sent me this.

That's from a z20let. Vauxhall turbo engine.

What's caused that? Not seen them break up like that before !

[Edited on 19/7/13 by Ben_Copeland]

I have seen that before on a seat leon turbo and it's down to being thrashed when the oil is cold

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BaileyPerformance

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posted on 19/7/13 at 09:05 PM

Any evidence of detonation on the top of the pistons?

Det can cause all sorts of odd problems.

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perksy

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posted on 19/7/13 at 09:15 PM

Looks like fatigue ?
Engine Overloaded when cold or as Bailey performance said detonation ?

Hows the crank journals looking ?

Ben_Copeland

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posted on 19/7/13 at 09:27 PM

Hes still yet to look at the rest of them, but the crank looks ok

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perksy

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posted on 19/7/13 at 09:48 PM

Was this the bearing furthest away from the oil pump mate ?

Ben_Copeland

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posted on 19/7/13 at 10:02 PM

If its same as my c20xe, i believe thats the middle one.

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Ben_Copeland

272bhp - 309ft/lb

Posts 6088
Registered 25/12/02
Location Margate, Kent
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Building: OTR : Z20LET Equinox Haynes Roadster

posted on 19/7/13 at 10:05 PM

Ben

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