Engine Won't Start

[Gandi699]

what kind of alloy manifold? does it look like this:



If its that one above then it could be a JP4S which the one from the c2 VTS so "better" than a j4 lets say also no need to worry about the cams. Those inlets are worth a bit too if you dont reuse it (needs various bits to work though)

[Phaeton]

I didn't get the manifold the guy had already sold it, but he confirmed it was an alloy one, as said slightly gutted as I have already removed the head it's lovely & clean in there as it's only done 35K, but I am where I am now, so need to get a new head gasket & cambelt. I'd read this one http://www.saxperience.com/forum/sho...d.php?t=323539 & it didn't mention a JP4S

[Gandi699]

pain in the arse that! at least if you have a JP4S it the decent engine, the seller obviously knew that and flogged the inlet for decent money Not many people buy the JP4S as its not cheap compared to a JP4.

[Phaeton]

So your thought is not to change the springs just to rebuild the engine with new gaskets, which is good as I also bought another engine off him which I can put my VTS cams & springs in as a spare.

[Gandi699]

obviously check its a JP4S but all being well rebuild. Supposedly the J4 tensioner is better and more sturdy for high rev use than the one on the Jp4/S engines so would be worth using that.
This is something I was considering for mine but I made the choice to go to just J4 as sourcing the j4 bits to go on a Jp4 would have been a pain. However as you have all of them should be a relatively straight forward job.

[Phaeton]

Had a look around the new head tonight & all I can find is





I measured the lobes on both the J4 cams & the JP4 cams & they were both 46mm I can't measure the the duration though but they seem the same.

Then just for a laugh here's a couple of the valves, one inlet, one exhaust.

[Synister]

Nasty! Any damage to the head?

[Phaeton]

Originally Posted by Synister

Nasty! Any damage to the head?

There does appear to be a small amount although without a straight valve it's difficult to check, if I was reusing it it may grind back in with a bit of mopping. But I have a full replacement engine, just need to drill the JP4 head to take the J4 inlet manifold, although I may chicken out & let a machine shop do it.



But at least it was consistent

[Synister]

If the new valves seat correctly once you've ground them in I'd leave it at that. At least you've the parts there to fix it.

[Phaeton]

Is there a recommended sealant to use on the cam covers this engined leaked like a Texas oil field, I'd like the new one not to do that

[Phaeton]

Came to rebuild the engine tonight & the wife has cleared away & put somewhere safe the piece of paper with the cam details on it. I have one cam 10A6 5008 & the other 04J5 4998 anyone know which is inlet & which is exhaust

[axsaxoman]

Originally Posted by Phaeton

Is there a recommended sealant to use on the cam covers this engined leaked like a Texas oil field, I'd like the new one not to do that

If using j4 cam covers (alloy)
then file off the lugs --then just a small smear will seal perfectly --no need for big bead

[Phaeton]

Originally Posted by axsaxoman

If using j4 cam covers (alloy)
then file off the lugs --then just a small smear will seal perfectly --no need for big bead

Thanks for that, I'm actually now just rebuilding a C2 VTS lump which I shouldn't have stripped in the first place but we live & learn. You can't help identifying the cams can you I wrote them down on a piece of paper & now can't find it.

[Phaeton]

Just to follow up on identifying the camshafts & my concerns of fitting them on the correct side of the head, I had another look last night & it became blatantly obvious that I had them sat correctly & that you cannot get them the wrong way around. There is a casting within the cam carrier which prevents the cam being put on the wrong side.