Mechanical Tensioner Timing Belt Problem

[sestepney]

I install the mechanical tensioner setup on my 420a and I'm worried that the timing belt will move off the cam gears once the engine fires up. I saw the youtube video that shows that there's a .007 gapp between the block and the tensioner top mounting holes and once the engine mount is installed it caused the belt to ride off the cam gears a little. After tightening all bolts I rotated the crank a few times to see if the belt would move and it did move a little to the inside just like it does in the youtube video. The guy in the video put washers between the block and the mounting hole and it made the belt remain in the center of the cam gears. Did anyone else have this problem with this tensioner?

 

[VelocitàPaola]

I didn't put any shims/spacers/washers between my mechanical tensioner and block, and the belt has been approximately centered on the gears for about 10,000mi. now.

 

[sestepney]

It may not be a problem but I have the motor out of the car now and I just don't want to have to deal with this issue once the engine gets back into the car!

 

[CODE4]

Did you cut the inner timing cover so the bracket sits flush against the block?

420A Mechanical Conversion Kit Images

 

[sestepney]

^^You no what I did, but I starting to think if I cut it big enough! I ordered some adjustable cams so when I install them I'm going to look at the back timing cover and cut it even more if i need to. Good thinking!

 

[CODE4]

If the tensioner is not sitting flush against the block with all mounting bosses, it will have issues down the road. A little bit of plastic behind one of the bosses will create a small gap on another one causing the misalignment of the tensioner pulley.