engine wear, pictures
Turbo Mini Forums

Hi


http://www.midtmini.com/index.htm

look at these pictures(in the link), what do you guys think have happened with this big end bearing? all the other bearings where like new, just that one that was bad like that. something wrong with it already when bought? good oil pressure, everything balanced and checked, 3000 km`s later and it gives up like that!

that looks familiar....i had that problem by not using center main strap and arp rod bolts, it was on a N/A engine, but due to power and lots of revs the crank flexes and blows ya shells to bits, if you r unlucky er you throw end caps off rods too ! was it from pot 2 or 3 by chance ?

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MikeRace, Mini13

Don't know. But all that scoring and crap inside the pump is suggesting this engine hasn't been running very cleanly for a start.

Hi, its from rod number 4. The engine was VERY clean when assembled, the galleries where opened&cleaned and everything.the pump has gotten some punishment because of the bits from the bearing I think.

Edited by miniminor63 on 12th Jan, 2006.

Was a oil cooler fitted,if so was it a new one

Metro turbo weekend driver,Mini turbo in the making again!

looks good, nothing looks to different to my stuff, but the shells do looks very bad.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
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http://www.mattwoodsphotography.com

debris like dave says

something has got in there

i once open a pkt of shells out and found there was one standard size and the other lot + 20 like i wanted!

maybe ???

Edited by BENROSS on 12th Jan, 2006.

I'd agree, the cause of the bearing material breaking away from the underlay like that has got to be debris has got round there?

that oil pump looks exactly like mine did. i put it to debris.

no longer a series, but still 1.3 turbo.

i didnt think the oil pump was too bad concidering the big end is such a mess. Was the crank ground before use? have you checked the journal for taper? Looks very much like oil starvation.


Edit: was the cap on the right way round?

Edited by andeh on 13th Jan, 2006.

I've seen the future and tbh its Pie

cap on correct way. crank is 010. done by MED. have not yet checked the journal. Will do!

looking at pictures it looks like shit in the oil way on number four joural on the crank was the crank & block checked and cleaned out or started with no oil pressure

Edited by jimmy on 13th Jan, 2006.

1293 Turbo mini

I don't agree on this being il starvation. It should have been blue of some sort then. I've got my mind set on bearing breaking up because something is wrong with it....I really cannot see this being oil starvateion.

The bearing with all the material coming off is that the TOP or BOTTOM bearing ? i would guess at it being the BOTTOM if its a high revving N/A engine as i see this with my 1450 revving it to 7500rpm.. but never that bad.
What oil pressure are you running with?

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

olil pressure never below 40 at idle with hot oil. A bit on the high side maybe at full revs. Crank and block cleaned and checked. It was not started without oil pressure. And yes it is a high revving N/A engine.

I'm running around 70psi HOT at 6000rpm and around 50psi at idle and have been since 1989 on the same engine so High oil pressure doesnt hurt a thing if you have the HP to spare.

TOP or BOTTOM ?

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

was the crank rods pistons flywheel with cover balance if you are running high rpm just a thought

1293 Turbo mini