MTX timing belt problems!! HELP!!!!

[93MTXSHO_STUD]

Yesterday I installed a timing belt on my 93 MTX. Everything seemed to be going smooth until i started the car up and noticed a howling noise coming from the belt areas. I dont know what it really is. THe tension on the aux belts seem fine I just here a howling noise. I have never changed a timing belt on the SHO before so I wouldnt know but the tensioner on the timing belt had a loose spring behind it. The spring right behind the tensioner was loose. I have know Idea why it would maybe its suppose to be that way. Could I have tightened the belt too much? Im outside right now trying to work on it, any help would be greatly apperiated!

 

[Yamaha V6]

a) belt too tight
b) timing belt retainer disc missing, and the belt is sawing through the covers.

Those are my guesses.

 

[93MTXSHO_STUD]

whats the retainer disc?

 

[Ishodu]

Its like a cupped washer thats goes against the lower timing belt sprocket to keep it on the sprocket.

 

[autobahnsho]

Its like a cupped washer thats goes against the lower timing belt sprocket to keep it on the sprocket.

LOL
When I changed my crank sensor I got it ALL put back together then realized that the retainer was sitting in my toolbox.

Like he said, it's a washer looking thing that has a "key" cut in it so it fits on the crankshaft. When everything's put back together right, this retainer is JUST INSIDE the lower timing cover. You should see it instead of the sprocket that turns the timing belt .

Good luck!

 

[sdpatt]

That "loose spring" should have been the only thing applying the initial tension on the belt. If it was loose, then it wasn't installed correctly. It should have been causing the tensioner pulley to apply pressure to the belt.

The initial tension of a new, or old, belt is set by loosening the tensioner bolt a half turn to let teh spring apply tension, rotating the crankshaft two full revolutions in the clockwise direction until the first, yellow mark on the damper aligns with the 0 degree mark on the lower timing belt cover (60 degrees BTDC on #1 cylinder - the greatest slack in the aft portion of the timing belt), then torqueing the nut on the tensioner.

This can be done by removing only the small, rectangular "door" in the lower timing belt cover. It sounds like you may have overtensioned the timing belt. I have posted the procedure to do this several times in the Forum. If you want to reset the tension, use please search on the steps to do this.

 

[93MTXSHO_STUD]

thanks for the info, the tensioner was indeed too tight, i fixed the problem, like when i did my mazda truck the belt could almost be pulled off by hand force. I put enough tension on the timing belt so there was a little play, but would not come off. i still hear a little noise, but you have to stick your ear towards the cover to hear the faint noise. I think its just the bearing in the tensioner that makes a little noise. Thanks for all the help guys!