1992 960 Timing Belt

bgrmafgh2012 · Post by **bgrmafgh2012** » 03 Sep 2013, 06:33

So I replaced the timing belt this weekend on my 960, a pain for a person with limited experience like me. I made sure not to turn the top 2 pulley's as I knew those were the most important. However to get the old belt off and the new belt on I had to turn the bottom (crank shaft?) pulley. Car runs great but I have lost almost 50% power, I am dang near positive that what I did caused this but I am not sure how to get it back to the way it should be. I know it can turn some to the left and right, looking straight on it I couldn't turn it anymore to the left but I could turn it to the right to tighten the belt as I was putting it on. Does anyone have suggestions or first hand knowledge on this? I started to drive it to work but quickly turned around and picked up my mother in laws car so it's just parked for now.

danr960 · Post by **danr960** » 03 Sep 2013, 10:06

It is good you went back home. Did you read up on the procedure before you started?
Because the first thing one must do after getting the timing cover off is to line up all of the pulleys to their marks. There is one for each cam and one for the crank. It sounds as though you are off one groove on the belt. You are so lucky in that the engine did not get a valve damaged. There are photo of marks on the web. Then when you think you are finished, you need to turn the engine over by hand two revolutions to make sure there is no interference.

Once all pulleys are on their marks, the hardest part is to make sure there is no slack from the intake cam down to the crankshaft pulley. Also between the two cams must be tight, all slack needs to be taken up by the tensioner pulley.

Write back if you have any questions. Even if you think this hard, we can help you here and get this finished correctly.

DanR '94 964 387,000 miles (153,000 on the new engine)

bgrmafgh2012 · Post by **bgrmafgh2012** » 03 Sep 2013, 19:02

Hey Thanks dan for the reply. I read up on how to do it before I did it (http://www.jaghelp.com/2011/06/how-to-c ... o-960.html) and another site. I am guessing that I should have looked at this site first (http://www.atthetipwebs.com/technologyi ... g_belt.htm) I saw the 2 marks on the cams but I didn't notice anything on the camshaft. So where are these marks supposed to line up? On the last link I posted it shows on the cover. I don't recall these marks on the cover but it sounds like I am going to be doing some work in my mother in-laws driveway. Where should these marks line up? What about the crank shaft, where should it line up?

Now for the better question, why don't they line up in the first place?

lindy8_man · Post by **lindy8_man** » 06 Sep 2013, 00:51

Here they are:

There is a solid post with a line on the end that is directly above the pulley. This matches up with a tiny notch in the corner of one of the teeth on the pulley. Please note they are NOT aligned in the photo.

You want to turn by hand the crank shaft pulley two full cycles to ensure the tension remains constant and you are not misaligned by a notch. After the two cycles all three marks should still be lined up!