roman944

so I get to finally put on new belts and rollers on my 944

I have a question though, there are 2 toothed and 2 without teeth, and I am not sure which is which - because they don't look like the rollers I have on my car?

can someone look at this picture



and tell me which rollers are they on this picture

hotblack944

Top left - timing belt tensioner roller
Top right - balance belt idler roller
Bottom left - balance belt tensioner roller
Bottom right - timing belt idler pulley

roman944

thanks, I got all confused with what is what

that bottom right piece, on my car, was a toothed piece ...

roman944

HAHAHA nevermind, I'm stupid, that was the first thing that we took off and I forgot all about it, LOL

sorry, and THANK YOU for the help! set my mind straight, HAHA

944Sknight

Are you aware that you need a special tool to install the belt? If you have not done that before I suggest that you go to a Porsche mechanic.

75ohm

No special tools for an installation, potential options for tensioning are a different story...

944Sknight

It is the tensioning toll that I'm talking about. Is thre any other option to adjust the tension without the
tensioning tool? In fact you have to readjust the tension again after 2000 miles.

75ohm

Why surely... We have the porsche tool itself, the arnnworx 920x, the kricket, and the twist method...

944Sknight

Hmmm.. twist method..interesting. Would you use this to your car?

Will Feather

Yes, and have on two others. People are just so nervous about their T-Belts breaking that they feel this method is unsafe. But I never had much luck with the cricket and who would buy the Porsche tool.

75ohm

Yes, several times, and on several other vehicles... but me being me, I also have an Arnnworx tool...

roman944

Hi guys

This is the "kevlar" racing belt from Rennbay

Me and my dad just put it on the car; now all that's left is to tension it properly, and then I'm going to try and start the car and listen for any unusual noises

I'm not going to put the balance belt on yet, only after I hear the car start

I hope there are no bent valves or nothing - my car slowly stalled in the driveway after running for about 1 mnt

I realize that there is a big chance that I have some bent valves, but I am crossing my fingers and holding my breath at this point

so what would be your suggestion for tensioning the belt? locating the Porsche tool? Krikit? what is the twist method? I'm going to do a search quickly when I get the chance

Thanks for the help/worries/suggestions

944Sknight

I'm sure 75ohm and Banana944 will be happy to teach you the "twist method" . On the other hand proper tensioning is very imperative if you want your car to run the way it used to be. You need the tensioning tool. Chances are you have a bent valve especially if you attempted to restart the car several
times from the first time it failed. Analyze what 75ohm said..that he has the tensioning tool so he might as well use it contrary to the "twist method".

Mark944na86

You will have one or more bent valves -- no doubt about it. You simply can't break a timing belt on a running 944 engine without some piston to valve contact happening.

Regarding tensioning, I've used the krikit and the twist method together (one method to verify the other) with success. Also, I've found the krikit to be a useful general tool to have around for measuring belt tension on things like alternator belts on non-P-cars -- very handy to be able to take a measurement before loosening a belt, then tension it back up again to the same tension. Good general purpose tool to have around! Actually, since I've got one, I've probably used it more on non P-cars than on my 944...

roman944

update:

you are probably right

started the car, barely, it runs - the battery is really dead;

we started it without the balance shaft belt, my dad said it sounds like there is some valve noise - but it could be because the car sat for a year without being touched

so we are going to put the balance shaft belt on, get the battery charged up more, and then try to start it and hear it run (possibly)

the car ran a couple of times for about 30 secs btw

don't know, we'll see what happens, if it needs a head rebuilt - then so be it - ready for anything, LOL