sharky47

Ok, If it is what I think it is, I will post pictures and an explanation to do-it-your-self belt changers. Here's my question- on the automatic tensioner there is a roller with a lip on it. Does the lip need to be on the front side or the back side (from the drivers view)?

sharky47

Bump, someone has to know......

Dal Heger

Toward the back of the engine.

(yup, I was wrong the first time..... memory fading in my old age)

Dal.

sharky47

Well, then I am stumped again. The reason I asked this is because on examining the belt, I noticed the the engine side has been worn like it has been rubbing on the engine somewhere. I found a spot near the waterpump that has been polished like the belt was rubbing on it. All the teeth on the damaged side of the belt are starting to separate from the belt! I though since the waterpump has the lip on the radiator side that the tensioner pulley should be opposite so that they would keep the belt in line. If the lips were both on one side, then the belt would drift over and contact the engine as mine seems to have done. Am I right in thinking this?

zakk

Rubbing the engine? Do you not have a rear belt cover?

Jay W

When all the pullies are in line with each other the belt should not push out to the front or the backside of the pullies they are running on. I had a tensioner problem on the 928 which caused it to make the tensioner pulley run on a slight angle. That angle pushed the belt towards the engine and part way off the pulley. See if your tensioner pulley is in a straight line with all the other pullies after putting tension on the belt. When serpentine belt tensioners go bad on GM cars they drop on an angle and push the belt off in a similar way.