The end of one of my camshafts has broken off. I am going to take the engine out and see what damage has been done. My car is a 83 Euro s. Can I put s2 cam shafts on it, will that mean its an interfearance engine moving forward. Does it give more horsepower?

Many thanks

I will post photos of the break later on

Peter

Euro 928s

 

Sorry about this. Which one was it?

The answers to you questions in order is Yes, No, No

 

Or you could just put another cam shaft in and see then if the engine needs to come out. You may be lucky

 

I don't think you need to take the eng out unless you have other stuff you want to do to it. But we're interested in what caused this.

 

928 INTL half price sale on used parts,
they might have a set of Euro cams for sale

 

Who tightened your cambelt?

Do you have confidence in their work?

I believe your vintage of motor has demonstrated a tendency to break the cam shaft if the belt is overtightened. No idea how you can check if that was the root cause of the problem at this stage- perhaps some of our engine gurus can indicate what to look for

Regards

Fred

 

please post pictures of the front of your engine,
when you retension the belt and use the Kempf tool set the belt to the low side of the window.
There is also an instance where the right side cam pulley splits down the middle and then snaps off the left cam snout
The right hand pulley seems to get loose and then spin back and forth on the cam wearing the keyway this splits the pulley.
If this is what happened then make sure to use new bolts in the cam pulleys

 

The drivers side (UK) cam pully did snap down the middle and I think this is what has snapped the other side cam. I put this on my previous post, I just found this problem when I was checking the other side before putting a new belt on. I think there might be a problem inside the engine because its not turning properly. The engine is coming out so I can find out

 

make sure to order new securing bolts for each cam, no need to see this happen again

 

What Stan said .... and regard checking the bolts for correct torque as a routine service item ... they get loose!

 

Can anyone confirm that I can replace the s euro cams with the s2 euro cams without much fuss? I have a set in the pipeline you see and I would like confirmation before I purchase them. Many thanks Peter

 

Not sure about the S2 cam, although there is a table somewhere that lists the duration, lift, etc for each cam type. The cam on the (US) drivers side (left side, sitting in the car) has a real tendancy to break for no real reason other than the fact that with the distrubutor there it is unsupported for a long distance. I have had two broken left side cams, one because the car had been hit hard enough that the pulley got bumped, and the other for unknown reasons. Might have been an overtightened belt, but if so, not by much. I have also seen at least two other cars with this. So don't assume that a broken left side cam is pointing towards a bigger problem.

Good luck with your part search. The S cams are very much in demand here, and the left side one much more than the right so it may be tough.

 

Here is link to a thread (I think, not sure if I am doing it right) with the cam specs table. I did a search for 'cam specs' and clicked into PorKen's thread. I think this comes from the little 2"x3" specifications book. Looks like the lift is the same S and S2, but with a different duration. Not sure what that will mean if you swap them in. Also might be a fit issue in the carriers, although I know you can swap S cams into non S carriers and such. If so you would just have to swap the carriers as well. If you do this you would certainly want to do both cams.

https://rennlist.com/forums/928-foru...ight=cam+specs

 

Not trying to steal this thread but this is timely information for me as I'm planning on putting the engine back in this weekend after having to replace the left cam due to what I believe was a loosened bolt. However, after reading this thread I may need to rethink my plans; if the bolts are prone to loosening then wouldn't the use of blue Loctite be prudent here? If so, I'm thinking maybe I should do this before the engine goes back in? Anyone else do this? Also, if the 16V'ers have an issue with over-tightening the TB then wouldn't PorKens tensioner be just the fix here? If I'm not mistaken the unit allows the belt to run on the loose side?

 

I would't say the Porkensioner "runs on the loose side." That wouldn't be prudent either. It keeps people from overtightening the belt, which is the common cause of a broken bolt/gear. Some owners don't like to give up the warning system, but you should be removing the cover(s) periodically and inspecting the belt and tracking anyway. YMMV.