brake down

[peanut]

ORIGINAL: Fen

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.

It does look that way now we have a little more information . It has rather come in dribs and drabs and rather ambiguous most of it. I find it difficult to understand how your cam belt could go at 30mph without noticing something ?

I guess I should learn to reserve judgement until the natute of the problem is a dead certainty then I can critisise others attempts to help and claim the correct diagnosis [][][][]

 

[zcacogp]

FWIW, on the one occasion I mangled a head due to cam belt problems, it was on a VW KR-engine (Mk2 16v engine, which I had tuned like Vanessa Mae's violin and mounted in a Mk1 Golf GTi.) That suffered catastrophic failure due to valve-piston contact, and packed up at around 7000rpm while accelerating hard.

It was an apparently silent failure - one moment I had power, the next nothing at all, and I coasted to a halt. I didn't realise what was wrong until I removed a spark plug and discovered a very mangled mess on the end of it - a valve head had snapped off and dropped into the cylinder. So, for those who think that such a failure is accompanied by some very expensive noises, this is not always the case (although the car was far from being quiet at the best of times.)

To be honest the most galling thing about the failure was that I had just - literally just - overtaken a Saph Cos at three-figure speeds, much to the chagrin of the four lads in it. And my demise by the side of the road was swiftly followed by them passing me very briskly, and gesturing very colourfully out of their open windows, to my considerable embarassment ...


Oli.

 

[type1]

Ok then here's the news,
A cam roller had seize on,which ripped teeth from the cam belt,behind the crank wheel,I only new when I got the wheel off,....
The belts were in good nick, but all the rollers and tensioners are very old,

It's one thing to change the belts, but it all must work as one,

 

[type1]

you were right john,well done that man,,,

 

[peanut]

ORIGINAL: type1

you were right john,well done that man,,,

Its a flippin miracle given the clues []

ORIGINAL: type1

hi,my 944 s2 has gone down.

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,

The problem with a lot of these cars is they tend to be 2nd cars and get intermittant use throughout the year. many get left a year or two unused before getting sold. Must be lots of timebombs out there waiting to go bang.
good luck with the rebuild.

 

[zcacogp]

Robbie,

That's a smeller. Sorry to hear it. Have you investigated any further - is there any damage to the valves or head? As I said, fingers crossed ...

You touch on something I have never understood - how do the rollers seize? When I last looked at one, it was a robust design with a nice chunky ballrace in the middle of it. Ballraces don't just seize up. Bearings don't just seize up. I have never heard of anyone driving along the road and a wheel bearing just seizes up ... why (or how) can this happen to a belt roller bearing?


Oli.

 

[RC18B 911 turbo]

I have experianced a ball race lock up but it was on my HPi pro 4 R/C car, got dirt in a ball race and the wholedrive train locked up, so it can happen just not very easily.

 

[peanut]

ORIGINAL: zcacogp

Robbie,

That's a smeller. Sorry to hear it. Have you investigated any further - is there any damage to the valves or head? As I said, fingers crossed ...

You touch on something I have never understood - how do the rollers seize? When I last looked at one, it was a robust design with a nice chunky ballrace in the middle of it. Ballraces don't just seize up. Bearings don't just seize up. I have never heard of anyone driving along the road and a wheel bearing just seizes up ... why (or how) can this happen to a belt roller bearing?

Oli.

If you leave the car in a garage unused for a couple of years and don't turn the engine over the oil drains off and moisure from condensation soon gets the bearings rusting. I don't know the history of the car but lots are left for years with expensive repair work needed then they are tarted up for a quick sale .Like I said a timebomb. Lots of rubber seals rotted lots of rust etc

 

[type1]

Hi all robbie here again,
Well the s2 has 8 bent valves,
The pistons are ok thanks to the speed I was doing?30 mph,
But the head it's self has had a knock,and I need both cams.
Any help with the parts would be a great help,
I've lots of jobs to do on the s2 over Xmas which will keep me busy,,,
Thanks all again,
Lots of you out in Devon and cornwall on the a 30 to day, Very nice to see,,,
Robbie in devon now back on his motorbike,

 

[RC18B 911 turbo]

It was the TIPEC meeting today you may well have seen me out and about too.

Doesn't sound too good with the bent valves good luck with getting it all sorted.

 

[Fen]

If you're in Devon already then give Andy Moss a bell on 07762 244477. He's just outside Honiton, but more importantly has a source of genuine S2 and 968 cams that undercuts everyone else I know of. The downside will be that the source is in Germany so you'll lose out with the Pound being in the toilet cpmared to the Euro these days.

 

[Hilux]

then doing 30 she just died, it was like I ran out of fuel.and now it's like the starter has gone,

If it was fuel it would `glide` to a halt as the engine would be turning but te compression would slow it down quickly.

Did the engine stop suddenly locking the wheels?

 

[peanut]

ORIGINAL: Hilux

then doing 30 she just died, it was like I ran out of fuel.and now it's like the starter has gone,

If it was fuel it would `glide` to a halt as the engine would be turning but te compression would slow it down quickly.

Did the engine stop suddenly locking the wheels?

been there done that first post. Try and keep up Paul [][]

 

[Hilux]

Sorry Nick, I`ve got the worst strain of man flu ever known throughout the history of mankind at the moment.[&o]

 

[type1]

Thanks alot,
I phone andy today about the parts,
He said pop up and I'll have a look about,
I left there with everything I wanted,
A very nice bloke and keen to help a new face,,

I'll be ringing him again for sure,

8 bent exhaust vavles to sort out and I'll be back moving soon,?
Maybe......

 

[peanut]

ORIGINAL: Hilux

Sorry Nick, I`ve got the worst strain of man flu ever known throughout the history of mankind at the moment.[&o]

Sorry to hear that Paul.
I had mine at the beginning of the month . Hope thats it for a few weeks. Get well soon. make sure Matron brings you plenty of hot broth[]

 

[RC18B 911 turbo]

ORIGINAL: type1

Thanks alot,
I phone andy today about the parts,
He said pop up and I'll have a look about,
I left there with everything I wanted,
A very nice bloke and keen to help a new face,,

I'll be ringing him again for sure,

8 bent exhaust vavles to sort out and I'll be back moving soon,?
Maybe......

Andy is a top bloke and knows our cars very well.

 

[Fen]

ORIGINAL: type1

Thanks alot,
I phone andy today about the parts,
He said pop up and I'll have a look about,
I left there with everything I wanted,
A very nice bloke and keen to help a new face,,

I'll be ringing him again for sure,

8 bent exhaust vavles to sort out and I'll be back moving soon,?
Maybe......

Andy's a top bloke. Did you see my car on the ramp at the back (assuming that's still where it is)?

 

[type1]

There's four in there all very nice,
It's good to have a look around different 944's
Just people's own take on the classic vehicle,
Andy's on the parts so I should have the rest soon,