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Quite a few questions regarding oversize rings,wrist pins bearings etc.


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I have a few questions for you guys im hoping you can help me with.

I have an overbored 2.8 12v obd2 im popping in my car around xmas once ive built it from the ground up.

Its running Mahle 82.48 pistons and it also denoted Sp000.3 on them too(what does that mean?)

Anyway it is running standard 20mm wrist pins/gudgeon pins i think(not mic'd them up yet) so i thought i should be ok as far as replacing the little end bearings goes but no joy!Is it VW only?

Im also really struggling to find a supplier of new oversize rings.Can anybody help me out?

Ive tried getting in touch with United Motorsport on a few occasions via email but i never get a response. :(

I plan on getting the new rings and then dropping them off at the machine shop along with the block to match them and give the bores a light hone,is there anything else you suggest i get them to do while its in there?

Ive also managed to get some ARP rod bolts but struggling to find a uk supplier of head studs?Any ideas?

Ive got a full bottom end gasket set on its way,along with a few other essentials but im stuck on where to get the timing chains and tensioners from?Is there a good after market option or am i better off going straight to VW?

Same with big end/main shells because when the crank goes away it might end up being reground.Do vw do oversize bearings?

Sorry for all the questions.Id just like to get a few loose ends tied up before i set about building it up.

Its going FI btw.

Thanks lads.

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Just got a reply from United Motorsport."We cant help you" :(

Correct, we do not supply the parts that you require.

What compression are the pistons?

Dont waste your money getting the crank ground if it doesn't need it, or if it does, simply replace the crank with a known good item with stock size journals. This way the crank is stronger, you know the size of the journals are correct and can easily get bearing shells any time.

Any engine machine shop (that is worth while) that can grind a crank will be able to provide you with shells. If they can't - Dont use the shop

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Only just seen these replies.For some reason my notifications arnt working.

Anyway the pistols are 82.5mm mahle with standard compression.However I'm possibly getting g some new ones on Sunday With a 9:1 ratio.

I now have 3 cranks which I will spec up and pick the best as UM recommends.

As for the chains etc I considered ecp as i use them all the time but wasn't sure of the quality.

Tps I've never used are they local Dave?

Thanks for the replies.

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