Reboring Question
Discussion
Perhaps you don't need a rebore, but "honing" of the cilinders (depends on tolerances). In this case you could perhaps get away with just new piston rings.
But others perhaps can help you in more detail.
Don't know about the costs either. But just honing instead of a rebore (you need honing always as a finish) is not difficult and will cost less.
Rob
But others perhaps can help you in more detail.
Don't know about the costs either. But just honing instead of a rebore (you need honing always as a finish) is not difficult and will cost less.
Rob
danhay said:
The pistons cost £150 each
Well if you will go buying Ferraris...
If you do find a ridge at the tops of the bores, then with pistons at that price it could be worth asking about getting the bores sleeved instead. Think you'd need to ask either a Ferrari specialist or top notch engine builder rather than local reconditioners from Yellow Pages though.
danhay said:
After a bit of investigation, it appears that the engine has liners, and that these can be replaced without having to rebore. Liners are 'only' £95 each. Though I assume a new set of piston rings should be fitted too.
Can anybody reccommend an engine specialist in the South East?
The liners will still have to be bored after installation surely? You will still need to replace the worn pistons also.
danhay said:
After a bit of investigation, it appears that the engine has liners, and that these can be replaced without having to rebore. Liners are 'only' £95 each. Though I assume a new set of piston rings should be fitted too.
Can anybody reccommend an engine specialist in the South East?
If the liners are dry they need boring after fitment.
If the liners are 'wet' like in a Jag V12 they should not need boring.
If the car is the Ferrari as in your profile why not go to somebody who is renowned for doing the job right that all the specialist engine builders get their machining work done at. I recommend Chesman Engineering in Coventry - 02476 689665 - they do lots of Jag and Ferrari work, and balance crankshafts for Ilmor Formula One engines. And they're cheap.
Well, in my workshop manual it says:
"Liners are free assembled in their housings. They are supplied ready to assemble, that is with prescribed allowances"
So I'm guessing they're wet liners. Also there is a void behind part of the liners for water or oil?
I would prefer to go direct to an engine specialist, so thanks for the reccomendation.
"Liners are free assembled in their housings. They are supplied ready to assemble, that is with prescribed allowances"
So I'm guessing they're wet liners. Also there is a void behind part of the liners for water or oil?
I would prefer to go direct to an engine specialist, so thanks for the reccomendation.
nonegreen said:
The liners will still have to be bored after installation surely? You will still need to replace the worn pistons also.
Disagree about the pistons. If they're in good condition (i.e. no bad scuff marks or wear in the ring grooves) then you should be OK just giving them a clean up and new set of rings.
One thing to remember when your fitting your liners ,
if there wet liners make sure they have the correct shims/o rings at the bottom to maintain the correct hight in the block.
sometimes liners can sink into the block and you can only fit one shim in most cases.
If you dont have the correct hight you may have to machine the face of the block.
if there wet liners make sure they have the correct shims/o rings at the bottom to maintain the correct hight in the block.
sometimes liners can sink into the block and you can only fit one shim in most cases.
If you dont have the correct hight you may have to machine the face of the block.
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