Mrmerlin

Sorry to hear this so now you have to rethink a few things,
so why not return the engine to stock configuration
( IE cams and springs and lifters) and toss on a super charger.

clearly you have had issues with the valve train ,
and parts now will need to be replaced again,
I ask again why not return to stock parts?

Adamant1971

Oil gear or water pump?

Sounds like a repeat of Rod's GT, except his valves were lucky.

I have no doubt that if presented with the appropriate evidence they will agree. Bottom line, something was not done correctly.

Jim M.

IIRC a timing belt will break as described if it gets "folded" . . . if they took it off and threw it in a corner where something heavy was put on it, it damages the interior cords. The damage can't be seen until the failure.

Adamant1971

Or take the S3 for a spin.

928 at last

Danny,
Check this thread out.....
https://rennlist.com/forums/rennlist...newmarket.html

DJF1

Thanks guys for your feedback and referral.

The WP, rollers, Porkensioner and Gates belt were done at the same time. 1 and half years ago and were done right by Colin in Vancouver. The likelihood that one of these parts seized in NIL. Besides I was not told today that any of these parts seized.

The shop worked on replacing the lifter valves so the cams, belts etc were out. Now HOW they were put back in is the million dollar question, especially the belt. I cant fathom the belt snapping like that.

Colin and I spoke to me earlier and he has a couple of theories on what happened which is clearly the shops fault in either case.

I have been digging here in the archives to find another Gates belt failing on its own so early, but I have not been able to find any cases, unless I'm really missing something...

DJF1

If I was able to do my own work that is exactly what I would have done. At this point, I was too deep in the hole with the shop who found the broken springs. Taking it back to stock would have meant new cams, new springs and a new shark tune which noone knows how to do in this area... Its all becoming academic at this point though...

Damn Rob. I WISH I have found that thread in the first place. Thanks for the link...

928 at last

Welcome.
At some point it would be interesting to know where your car is now....so they can be avoided....

DJF1

PM replied

Lizard928

I'm afraid that I haven't had time to be on the forum much as of late as I've been silly busy.

But I have been conversing with Danny, as well as the shop/tech through this whole fiasco.

With the description of the failure of the timing belt, and all the information that I have there is only 2 scenerios that I can see have happened.

#1, the tech dropped a washer or other such item into the timing belt area (or came dislogged), and went thru a gear with the belt at a perpendicular angle to the belt effectively cutting it.

#2, while the tech was replacing the valve springs and using the compressed air to hold the valves up he did not install the flywheel lock (Tech already admitted he didnt lock the flywheel), this then allowed the crank to rotate, and the tech did not pay attention to the belt to watch its movement, with the rotating of the crank the belt was taken in and pinched flat by the pressure of the air in the cylinder. This then damaged the fibers in the belt leaving a weak spot, which then let go.

It is very likely that scenerio #2 is what has happened. But the tech will be inspecting all the gears for damage that could be caused by a washer going thru the belt.

I know that should the cams have become seized (they are not), the belt is unlikely to snap, but is more likely to simply strip the teeth from the timing belt.

Unfortunately Danny had already taken it to a shop and the work had been started prior to me being informed of the situation, or I would have been more than happy to go there and fix the car.

I will be keeping a very very close eye on this with Danny and the techs to ensure that the outcome is as it should be.

BC

The money issue is where the fight will be. Fixing this is no real issue - just time and money. The frustration is when people that don't know jack try to do this crap.

Get the car OUT of there, put a cover over it for a while and make a small claim to make sure you are not negative on this escapade.

Simon928

That sucks man. I genuinely hope that your car gets fixed properly. If you're looking for a place to take your car, I can second the suggestion to bring it to EU Autowerks. I've only had my car to the mechanic once (right when I bought the car a couple of years ago), and I brought it there at the suggestion of a few Rennlisters. The shop is very familiar with the 928 and did a good job. Since then I've been learning how to do everything myself, because otherwise I'd never be able to afford owning this beast.

GregBBRD

Colin is a real stand-up guy.....obviously not who caused this event, but so concerned about what happened that he called and discussed what happened, with me, for quite some time, today.

I'd love to see a picture of the failed belt (Colin told me he would forward me a picture, as soon as he got one). From what information he had, the belt failed without a large amount of "cords" hanging loose from the broken area.....but was essentially a clean break right across the belt.

If this is the case.....the answer is right there. Belts do not break, like this.

Danny.....this really sucks. However, I'm going to go out on a limb and virtually guarantee that this will not be the worst thing that is going to happen, in your life. Get it fixed and in 6 months of enjoying your car, you will hardly even remember what happened!

ptuomov

How about they timed the cams wrong, fired it up and bent the valves, and then cut the belt afterwards to come up their story.

GregBBRD

Ouch.

Didn't even occur to me that someone would do that.....

However, that certainly could be valid enough to be #3 on Colin's list.