Pistons, liners and shims. Re-build or Replace the engine? Forums

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Motorhome Facts :: View topic - Pistons, liners and shims. Re-build or Replace the engine?

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Pistons, liners and shims. Re-build or Replace the engine?

camelotcamper

Joined: Jun 24, 2011

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My 2.0 ltr petrol 1986 Talbot Express Camelot camper has had serious engine power loss problems, overheating issues and water in the oil. So I decided to start checking it out.
When I took the sump off I found bits of piston and rings amongst the oil. Looking up inside the block I noticed the remnants of a piston inside the wet liner, so off with her head. To my horror I found the rest of the pistons had also fractured. This thing was RUNNING on 3 and half pistons, which amazed me, J5 engines are tough little buggers! After a little weep and some fist waving, I got some help and advice from a good mate (Peter) who was an engine mechanic in his day. It turns out the liners have gone oval and the shims, where paper thin. Basically the pistons shook inside the liners for longer than I’d care to think, causing a trail of gradual destruction. Even Peter wouldn’t consider fitting new parts without the correct measuring tools. The new parts would come to around £460 plus £80 for gaskets and rings etc. A second hand engine is about £500, but with old parts!

Has anyone had any experience with this engine re-build?
Do I need specialist equipment to fit new pistons, liners and shims correctly?

I suppose one option is to get an engine from a running 90s camper with a wrecked shell. At least there’s a chance it won’t be to knackered. What’s the youngest year of camper model that would fit in my Camelot engine bay and fit the bell housing?

Any advice would be great...I’m not scrapping it or selling it as spares or repair....I like it too much. Taxed 6 months MOT 11 Months

Thanks Nick

erneboy

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I would be wary of rebuilding any engine with that amount of damage, it would be hard to be sure there is no damage to the block I think.

Seems unlikely the head has completely escaped damage from disintegrating pistons too.

Have you checked the crankshaft. I am fairly sure that with that much top end damage some crap will have got in there and damaged it too, so a regrind and bearings there too I expect. By that time I expect you will have spent enough to have bought a sound second hand engine, Alan.

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