Porsche 944 sp1 owners guide

I talked with my brother who is a master mechanic in Ireland and he was saying the serpentine belts need to be a lot tighter than we had thought. Internet myth states that you can turn the belt through 90 degrees with your hand and it's tight enough which he says is bull shit. They need to be tighter than that. So, it's time to buy a tool. I bought this one:



http://www.otctools.com/products/detail.php?id=1762



from http://www.etoolcart.com. Hopefully, this buying experience will be a good one. I ordered it today and I'm waiting for a shipment notice. Once the tool arrives then we can start checking tension etc and see where we get.

Happened again today at Road America, 3 track days after replacing it. Second session out, aarghhh, one day I'll get to drive this car. No wiring damage today fortunately. I think I've figured this out now so hopefully this is the last time.

The problem is that cars pre 85.5 use a 5 rib alternator belt, 85.5 and later use a 6 rib belt. My car has a crank with 5 ribs and an alternator with 6. The 5 rib belt skips on the alternator during cornering and blows apart shortly there after.

So, I need a 5 rib alternator pulley and then I reckon I'm going to be fine.

Learned more about serpentine belts today. There are two naming schemes, one that looks metric and another one. The metric one is like 5PK0700 and the other is 280K5. Both are the same thing.

I just did a DE weekend at Brained and the car worked very well. We did 3 25 minute sessions on Saturday and an hour long one on sunday and everything worked. Fuel guage works and fans/cooling system worked fine.



The high speed fan issue turned out to be the red/white wire in the front wire harness was grounded somewhere. This wire connects to the radiator fan switch and the AC dry switch. It seems to be shorted behind the repairs I did up towards the fuse box. It's some kind of wire touching the chassis issue but we couldn't find it. In the end I bend over the spade on the fan relay to disable the high speed fans and this worked. The car now just has a working low speed fan but this is working well enough for now.



The high speed fan is still necessary though as it helps a lower pressure area behind the radiator and lets more air flow in as a result. Thats next.