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hi,my 944 s2 has gone down.
I would like to know what to do if the timing belt or cam belt has gone,
Can you refit a new cam belt and go,or is it engine build.o
The last serivce was a 1000 miles ago.any help would be great thanks robbie.
I did 80 miles on Saturday then doing 30 she just died, it was like I ran out of fuel.and now it's like the starter has gone,
 
If the cam belt has snapped then you will prob be looking at a new engine unless you are very very lucky. Have you checked the cam belt?
 
Doesnt sound like a belt has gone? If the 16v engines are anything like the 8v then you would know if the cam belt had gone i.e there would have been some rather horrible noises coming from the engine :D.
 
Its an interference engine, so if the cam timing has slipped the resulting damage will be bad. Ive got a lot more experience of the 2,500cc 'S', which is different although essentially similar. There its rare to save the head nad it isnt uncommon to have to replace a piston either. Most failures are caused (with a lot more liklihood as you have to wring the pos engine's neck to make any progress) by the timing being lost between the driven camshaft and the slave camshaft. Balance belt failure can aslo take out the camblet, but thats rare too. Where the slave drive chain failis its not uncommon for it to lash around the web on which the tensioner pad is mounted (the actual cause of the problem as its not a service item) and wrench it off the head, wrecking it. I remember when an aquaintance had 8-9 944S's in his arehouse waiting their turn for the very rare replacement heads to be sourced...

What makes you so sure that its a timing failure?


Simon
 
Thats 'wrecking' the head, not wrecking the tensioner, unfortunately. I omitted to mention that most, if not all, valves will be FUBAR too...
 
I have to agree with all of that; if it's the belt (and broadly also if it's the chain) then it will not be pretty, but are you sure it's a belt or chain? I don't know what else might cause the same combination symptoms - total loss of power could be a number of less dramatic things, but none of those that spring to mind would also result in the engine failing to turn over on the starter, but stranger things than 2 simultaneous and unrelated failures have happened.
 
From the description could it not simply be a flat battery, fubared alternator rather than a catastrofic internal engine failure?


Just a though[:D]
 
Someone recently had their 944 cabriolet's engine just cut out on them and in the end I think it was something like the wiring loom had water trapped in it which I think caused the fuel pump to not operate, I'm not to sure on the details though as I was only informed of this earlier by the bloke's son.
 
the cam belts I've known fail were all at relativly low speed/ high load like under fast acceleration, pulling away or rapid de-acceleration.
Doesn't sound like cam belt to me. Easy enough to check surely ? there is a belt inspection access somewhere if I remember rightly.
My bet would be electrical failure like immobiliser or ignition switch etc. If it was fuel related I would expect some coughing and spluttering before cutout.
If the starter doesn't spin it could be the ignition switch or LT supply from the ignition switch to the starter solenoid.
 
I had a belt go with similar symptoms although not on a 944. As has been said, it takes minutes to check the belt - the belt cover is held on by a handful of Allen bolts (6mm ket IIRC) and it doesn't take a whole lot of effort to check the chain.
 
Does sound like it could be electrical - if your alternator had gone, the car would have run for quite a while before the battery died.

Is it worth trying to turn the engine over by hand ? - will you bend even more valves if it's broken already?
 
Certainly sounding more electrical than mechanical, and alternator is a good bet from yor description - a decent sized and charged battery would run the car for a fair distance on its own. Check the battery charge, charge it and then check the ignition lights - quite often the lack of a battery light on the dash is indicative of a charging system failure (dependent upon system wiring)
 
On the S2 there is a cam belt access port at the highest point of the cam pulley on the front of the engine. You can't fail to see it. There should be a rubber bung slid into the port, but this is often lost.

If the bung is there, slide it out and look into the port. If you can see the belt, that's good. If you can't .... that's bad!


Oli.
 
The belt may have stripped teeth at the camshaft end you can still see the belt. If this is the case, turn the engine over and if the belt is present but not turning that points to stripped teeth. This happened on my 944S2 luckily on start up and no lasting damage was done.
 
ok here's the news,
Cam chain is ok,both cam and waterpump belt are there but slack,and they don't move when crank is moved,
The gen belt is there and power steering also,
Loads of power from the battery,
New belts here in the morning I've the notes to set them up,and I'll try that,any other help would be great, thanks to u all so far with the fault finding.robbie
 
probably not a good idea to turn engine over if you suspect cam belt failure is it John? better to inspect the belt first I should have thought .
Its very unlikley anyway as the belt teeth aren't going to strip off at 30 miles an hour in one small part of the belt and suddenly stop the engine at the stripped bit of the belt .


 
If the belts don't run when the crank does that's all the info we need, isn't it? It doesn't really matter why the belts have slipped (which could be stripped teeth or a tensioner failure etc.), the fact is it looks very, very much like they have, which I'd suggest isn't sounding good for the internals. Double that if the engine won't even turn over on the starter as that suggests some binding ov valves and pistons to me.

Sorry, but I agree 100% with Oli's post.
 
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