[jimbo147]

Im going to do battle with the engine next weekend to sort out the head gaskets, im gonna book to get the heads skimmed once there off, just wondering what amount of material to remove? Whats safe to remove and what effect will it have?

Cheers James

 

[Maser3200]

There seem to be a few head gaskets blowing - mine went at 100,000 (rear bank) normally the minimum is removed to ensure (if warped) the surface is flat the enigneers will make that decision. I had my main bearings, piston rings and cambelt replaced at the same time plus a couple of valves were burnt out 9possible due to temprature issues leading to the gasket blowing so reseating and replacement may also be required.

 

[jimbo147]

While im picking peoples brains is there a good way to test the hydralic tappets, i think 1 of mine is giving up cos i have that tippy tappy noise at idle.

 

[amclean]

I had mine tested and all held yet when they went back in I had a ticking tappet or tappets. I'm going to change them all at 100k miles.

 

[BeautifulBusso]

While the head is off, might as well have it polished and ported

 

[jimbo147]

That's money I don't need to spend, hence why I'm doing this myself, besides from reading on the net (Wikipedia) polishing doesn't work now a days because machining at manufacture has improved. Porting on the other hand is serious business I just can't afford to get done.

Cheers James

 

[AYAT]

When I enquiried it was ££££ for porting and polishing so won't bother for the gains it would yield.

 

[Superino]

I know someone that does really fine cut head skimming for £70 + VAT for both heads V6 heads. i think he cleans the ports etc for reasonable money too.

 

[jimbo147]

Where abouts is that's, the my local engine machinist is pricing it at £42 a head, so I expect with postage it will work out the same.

Cheers

 

[Superino]

He's in Hatfield - Hertfordshire specialises in race and historic engine building

 

[BeautifulBusso]

When I enquiried it was ££££ for porting and polishing so won't bother for the gains it would yield.

Yeah mine weren't cheap either but then again, it will also depend on the cams etc.

 

[Saabretooth]

I'm having my heads skimmed about 1 to 1.3mm

What gaskets should I replace other than the head gaskets, when its off.

Oh, mild cams would be going in by then too.