[ste1999]

Hi all, Im reaching the point where Ill get the head off my UK 968S soon, the intention is to restore the car to a high standard and Im pondering the merit of just going for 16 new valves and guides rather than salvaging the existing. That gives me essentially an as-new head assuming the seats clean up well, maybe this is overkill though, opinions welcome. Anyway this is only an economic way to go with aftermarket valves, AE seem to be a common make, clearly OEM parts would be crazy money if all valves are replaced with new. So ...are aftermarket valves a bad option? Im guessing many of the lower cost exhausts are not sodium filled. Opinions on these for a street only car welcome. Any recommended manufacturers? I appreciate all input. Obviously UK based supply is lower cost for me,

Steve

Partial Post: Please Login or Register to read the full post.

[MCL968]

Interesting question. I would opt to keep the originals if there are no reasons to do otherwise. If there is an alternate supplier, Waylander will know.

 

Martin, are you out there?

Partial Post: Please Login or Register to read the full post.

[ste1999]

Thanks! Obviously I haven’t seen the originals as yet. They have 132k mi and 25 years though...


Steve

Partial Post: Please Login or Register to read the full post.

[Ryan]

I would let the machine shop make the decision as to if replacements are needed. Just because of the mileage doesn't mean they are done. Lots of luck. 

Partial Post: Please Login or Register to read the full post.

[94SilverCab]

I would run a leak down/compression test and let that guide my course. If it ain't broke, don't fix it!

 

JMHO,

 

Jay

Partial Post: Please Login or Register to read the full post.

[Waylander]

I would not replace the Valves with cheaper aftermarket ones, I have seen these engines at 200k and the valves are still within spec, the guides are dead but easy to replace, and 130,000 miles is just about run in, mine is at 155K and no head gasket done or any other major engine work.

Spending huge amounts of money on the engine internals will not make much difference when you come to sell the car on, you can count it as money lost

 

having the crap cleaned out of the inlet manifold and the valve guides replaced and the seats 3 angle cut will bring back all the BHP thats gone walkies.

In the UK I would suggest this work if done by a garage (shop) will come to about £3K.

 

A set of genuine valves will cost you

 

Exhaust £880

Inlet £800

 

If you were really going to town then a new set of valve springs would be a good idea too

 

Springs £400

 

If you want more BHP, the the law of deminishing returns is powerfull

 

Plus the gaskets and all sorts of other bits that break, and labour maybe some small change out of £4000

 

and that for just about 40BHP.

 

Just to add, If you are going to do this I would reccomend EMC Motorsport In Birmingham, possibly the best 968 place in the UK

Partial Post: Please Login or Register to read the full post.

[ste1999]

Hey thanks for all the replies and ideas. I take the point that the valves may still be too good to throw. OEM valves, wow £££!!! The car will I hope remain mine for at least 10 years, I’ve owned it about 15 already. Till I get too old to drive it . I’m doing the work other than any head machining and am happy to go slow, it’s not a daily driver, labour costs not a concern, it’s a project. I think the comment on asking the machine shop what they think may be a good one. I found one very near to me in Slough UK that promises head expertise, was thinking of having a chat when it’s off


Steve

Partial Post: Please Login or Register to read the full post.