Hello,
I am looking for a cylinderhead with valves for my XJ6 S1 2.8L. (1971).
I don’t need the camshafts.
The one I have need to be skim around 0.7 mm and no gasket will be enough thick.
Help or advice would be apreciated.
Thanks.
Hi Laurens,
Where in Europe? Nice car. 0.7 mm is too much?
Any XJ head will do. Series 3 heads have larger inlet valves.
Hello !
In France, in Burgundy city of Nevers precisely.
It seems to be difficult to find gasket for this skiming.
Any hint ?
Thanks !
Lau.
The gasket can be found at the usual suspects: DMG, SNG or ebay…
I do also have an S3 Cylinder head I will not need but I have no idea if it is in better shape than what you have. I went with a replacement engine since my cylinder walls were bad…
I think you can find a thick enough gasket.
What becomes a problem is when the head is warped too much, then machined, the camshafts will still be bent. I don’t think 0.7mm is too much though. I will look for the spec if I can find it.
The head can be flattened again in an oven but all the steel has to be removed so it is cheaper to buy another. Maybe together with an engine for 300-1000€.
0.7 is .0028" which is well warped as the spec for straightness is ~.003"
Also depends on whether its been skimmed before,
on some Jag heads I have seen there are pads with stamps in them that would be milled away completely @ 0.010" presumably those ones have never been skimmed
As David said, if they are warped 0.7mm, the cam tunnels may be out of spec, however, you should probably be able to suss that out yourself, if you are technically inclined
Thanks for your answers. The second solution for me is to find another cylinderhead. In this case, how may I check if it has been already skimmed ?
Is there any way to check the original thickness of the cylinderhead ?
The milling machine at the factory didn’t mill all of the surface, it left a ridge in the four tabs that extend from the planed surface. If there’s no ridge anymore you know it’s been machined.
If it’s still within spec does it even need to be planed or is that spec for what is salvageable with milling? Can’t it just be pulled back down?
Merci. Somebody offers to sell this cylinderhead. If I do understand well this one has not be milled ?
It should have a line there and it doesn’t. But it doesn’t really matter.
If the camshafts turn well and the head is flat I would assume it is good for use especially if the price is right.
I shall check with the dealer (on Ebay). The price is around 450 € including shipment to France.
Thanks
Am I the only one worried about this?
I am not sure I agree with that “all” of them have to have a line there. It is very unlikely that mine was cut since it would have had to be in the first years of ownership. But in then end it really doesn’t matter as long as it is not warped it should be good even if you have yours shaved.
No more, I thought it was paper. Shouldn’t be too much of an issue, these studs are dry, but still.
Do you think if I fill this crack with aluminium welding and then mill it, it will do je job ?
merci!!!
To me, it has not been milled or ground…
CHJ
Bonjour tout le monde !
I am about to buy a new cylinderhead. However, according to some specialists of milling, 0.7 mm warping is not a big problem. I have just received a new gasket (1.8 mm thick). I shall have to choose between the best piece. I don’t know about the valves guides and seats of the new one. I shall keep you updated including pictures.
Thanks everyone !
Am I missing something, the cylinder head pictured here is not the same as the one above??
you are right. The one I posted was my spare one. I was just showing that it had not been milled down and did not have the ridge line.
Hello everybody and merry Christmas !
At last I have found a new cylinderhead. It has been milled and received new exhaust valves. I am about to reassemble it on the cylinder block. Nevertheless I wish to fit the inlet manifold on the cylinderhead before. I have not made enough pictures while dismantling. Does anybody has a schema showing the place of all clips and little pieces which fit with the manifold ?
Thanks to all and I wish you an happy new year !