likely condition of crank and bores from 58000 mile donar engine
Turbo Mini Forums

I am going to kill the metro at the weekend by pulling the engine from it. It has covered 58'000 miles. I am looking to use this engine as base for the turbo.

Is there likely to be any appreciable bore wear, and is the crank likely to be solid still, i.e. just need a polish

I know until i pull the engine apart I will not know the exact condition internally, but what is everyone elses experiances with similar milage donar engines?

It will get std turbo pistons, mg metro cam, and a bit more boost upon reassembly to a lower milage transmission.


Thanks

Edited by minimole23 on 13th Mar, 2008.

Deleted, post phrased wrong so I looked like a bodger:$

Edited by minimole23 on 13th Mar, 2008.

depends if you find anything nasty. not even put new bearings in my engine, there was no wear on there one i examined. mine has only done 20 odd thousand miles though. id hone and change bearings, might be worth getting new oil pump as well. then put it back together and see what you have

Its very variable but odds are you will need a rebore, If you are buying new pistons anyway, why not?... Its the extra cost of pistons that make rebores expensive.

You will maybe get away with a crank polish.. both my cranks were fine and my mate is just doing a Midget engine and his is fine as well so 3 for 3 at the mo..

Terry

website:- http://www.terryhunt.co.uk

I already have the set of std size turbo pistons. Hmm What i will do is pull the head off and take the engine to the machineist to mic the bores up before ripping it apart fully.

I do have another engine with perfect bores but it is in the car at the moment. and I don't really want to have to mess about swapping engines If I can avoid it.

There will be a noticable ridge at the top of the bore.

Buy some liners and fit those. Theres a bloke selling a set of four Genuine rover liners on Ebay for around £45.

website:- http://www.terryhunt.co.uk

No, I am going to completely rebuild the engine. New cam bearings, main bearings, big ends etc. tappets, mg metro camshaft, new piston rings. clean all the oilways out.

The reason I asked, is that I thought I would have got away with a hone on the bores, I would not have expected them to have a significant wear lip at that milage.

The reason for my wanting to use std size parts is, I have them lying round and may as well put them to good use.

I may pull the engine in the mini at the moment because I know the bores on that are spot on in that, and am fairly sure its low milage and just use that as the donar.

Edited by minimole23 on 14th Mar, 2008.

I see, you just want to see the bores to decide which engine to strip.. good luck!! 58000ml doesn't sound much in these days of japanese engines but on an A-series.. you may need it!!

website:- http://www.terryhunt.co.uk

Well, what can I say? Fookin good engine! There is a negligable wear lip - i.e virtually nothing, and where the top rings land it only has ever so slight wear flatting off the honing marks.

A very happy me, though the head was a fucker to take off due to a head stud seizing, but the engine has never been messed with before.

I had a engine that had done 53000 miles which had been looked after. I managed to get away with a hone of the bores and just fitted new bearings and rings, I have however just pulled it to bits for a rebore/build as it had started breathing and blue smoking. If you can afford it i would go the hole hog and fully rebore/build it otherwise just take the risk!

Edited by minimole23 on 18th Mar, 2008.