Cylinder lining opinion

[alabbasi]

Unfortunately my engine overheated causing it to blow a head gasket and maybe warp. I just removed the head and saw this on one of the liners.
Do you think that the block needs to come apart?

[Boosted LS1]

A few scuffs doesn't mean you need a new liner. I'd check the piston for damage and see if the liner can be honed and you may need new rings. Yes remove the piston in case of hidden damage.

First examine it :-) Then decide. What engine is it?

Edited by Boosted LS1 on Tuesday 22 September 20:51

[alabbasi]

Yep, I was asking if the block needs to come out and off to the machine shop. They can decide if it needs a new liner. Its a 6.75l Rolls Royce engine from an 84 Corniche

[stevieturbo]

If all you're referring to are those light vertical scuffs....I really wouldn't worry too much.

[Boosted LS1]

I'd have the piston out if only for peace of mind.

[Auntieroll]

RR V8's can suffer from distortion of the liners caused by galvanic corrosion occurring due
to insufficient/ no antifreeze being used.

This can slightly bulge the base of the liner and usually shows as a light knocking noise at
tick over, could this possibly the origin of the scoring on your cylinder liner ?

Correct removal and replacement is a job best not left to your local engine machinist , it is a
specialist job and , IIRC , the block needs to be heated to enable correct fitting.

The RREC will no doubt have bulletins and people who have experience of this.
The club also operates a specialist tool hire service for RR/Bentley.

HTH.