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Technical Head gasket replacement

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Technical Head gasket replacement

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tmccar

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My 2001 Punto 1.2 8v has a blown head gasket. I have removed the head which I will have skimmed, and I am wondering about the appearance of the valves, block and pistons, having never done this before. There is a thick coating of carbon just about everywhere - is this something to be concerned about, or is it to be expected?
And how should I proceed with cleaning of the block face and pistons?

Thanks
 
For the block surface, solvent and an aluminium or hard plastic scraper. Make absolutely sure -- leave this till last -- that the threads are completely free of oil and carp.

You can use a piece of plastic to scrape off the carbon from the pistons and head.

Ideally, re-cut the valves, fit new valve guide oil seals (they come with the gasket kit). The old ones are barstewards to remove -- and the guides are fragile. best to cut them off. Re shim the valve clearances.

Blow out any crap and dust, clean everything thoroughly, oil bearing surfaces (but not the mating surface of the head/block/head gasket).

Its all in the Haynes -- barking mad to do it the first time without one.
 
(but not the mating surface of the head/block/head gasket).


for the block,ijust use stanley blade,a gentle skim using blade on its flat
is good for removing bits left of old gasket,

ive done this for years no harm done- but maybe this method is not in the book,
 
fingers99 said:
For the block surface, solvent and an aluminium or hard plastic scraper. Make absolutely sure -- leave this till last -- that the threads are completely free of oil and carp.

You can use a piece of plastic to scrape off the carbon from the pistons and head.

Ideally, re-cut the valves, fit new valve guide oil seals (they come with the gasket kit). The old ones are barstewards to remove -- and the guides are fragile. best to cut them off. Re shim the valve clearances.

Blow out any crap and dust, clean everything thoroughly, oil bearing surfaces (but not the mating surface of the head/block/head gasket).

Its all in the Haynes -- barking mad to do it the first time without one.
Click to expand...

Thanks - what solvent would you use?
 
I have a lot of solvents knocking about, but acetone would be my first choice, panel wipe (a car paint supplier will have some) my second. Ether would probably work very well, but is harder to get hold of. Generally you want something that degreases very well, and evaporates quickly. Petrol would work.

But no naked flames, no smoking, good ventilation or kabooom!
 
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