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Cyclinder rebore services in greater London?

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exvalvesetdabbler:

--- Quote from: Athame57 on August 13, 2025, 03:40:08 PM ---
However, how can I be sure it is a first rebore, is there a way of telling from pistons or something?

--- End quote ---

If the rings are over size it should be  stamped on the top face of the ring.

I have a good cylinder block in the shed but the liners are scrap. They're already +50 with a deep gouge on one where a washer was embedded in the top and side of the piston. I only kept them because the fins were undamaged.

Regards
Dave

Regards
Dave

Bryanj:
Trouble is that the markings on the rings are so light they wear off and cant be seen, similarly pistons used to stamped on the top but recently seen quite a few just written on in marker.

Only certain way is measuring, vernier calipers shoul be accurate to 0.25 mm, actually a steel rule should be that accurate!

Its now difficult to find both 0.25 and 0.75 mm oversize parts, Cruzin only do 0.5 and 1.00mm, having said that i have done quite a few 500 blocks in the last year and only one cleaned at 0.25, all the others were found to be "barrelled" in the bore

TrickyMicky:
This is just a "pie in the sky" thought, But if you should ever win the lottery or similar, DSS has genuine standard size pistons and rings in stock, and Megazip in Japan have a new genuine cyliner block in stock. I can't put the price on here as there is not enough room!!!!!

Athame57:

--- Quote from: TrickyMicky on August 14, 2025, 08:00:26 AM --- I can't put the price on here as there is not enough room!!!!!

--- End quote ---
How about 'all the tea in China'?

K2-K6:
If the bore can't be reliably refinished at smaller oversize, then going straight to 1.0mm would be a sensible route to recover the liners in situ .... unless its fundamentally not going to be serviceable at all. The mechanic suggestion of rebore indicates its not catastrophic though.

More importantly, why did it fail is crucial to know. If that's not clear, then the same risk is present for the new component etc.

Can you get pictures of the damage in bores, pistons (skirts and crown etc) to post and draw observations on here ?

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