Mi16 Cambelt Tension

[sport1901966 8]

Hi all,

 

Not far off putting in the engine now but just wanted to double check the belt tensioning. After searching it seems that both tensioners should be used to tension the belt equally (is this meaning the tensioners are both turned into the belt by the same angle) and that I'm aiming for a tension where the belt can be twisted 90 degrees on the longest run. Is this right?

 

The reason I'm double checking is the Haynes way is a bit vague -

"57 If the tension is being set without the use of the special measuring tool, proceed as follows. Using the square-section key fitted to the hole in the tensioner backplate, move the front tensioner pulley against the belt until all free play is removed from the belt. Hold the tensioner in this position, and tighten the pulley retaining bolts to the specified torque. Similarly move the rear tensioner pulley against the belt and tighten the bolt."

 

I did try to source the tool (don't actually know its name) to measure the belt tension but can't find where to get one??

 

This is just for confirmation for my peace of mind really. Any input would be great! Thanks

Edited October 31, 2009 by sport1901966

[pee vee 1]

i basically work off the general rule that on

 

the Longest run of the cam belt, you should be able to twist the belt 45 degrees each way.

so exactly as you say in your post. 90deg in total.

 

never had a problem doing it this way, and the belt don't whine where its too tight either.

Edited October 31, 2009 by pee vee

[sport1901966 8]

Cool seems like it's ok then!

[welshpug 1,657]

worth noting that you can get the tension correct, but due to the pair of tensioners the camshaft timing can still be out, check these by winding the engine round till you can fit the crank locking pin, then try the camshafts.

 

you may well find you need to add more tension at the front (or rear) tensioner, and back off the opposite tensioner.

[sport1901966 8]

worth noting that you can get the tension correct, but due to the pair of tensioners the camshaft timing can still be out, check these by winding the engine round till you can fit the crank locking pin, then try the camshafts.

 

you may well find you need to add more tension at the front (or rear) tensioner, and back off the opposite tensioner.

 

Wound it round a few times and the cam locking holes were still in the same place. Based on that I guess its ok?

 

Cheers,

Geoff

[welshpug 1,657]

yeah, spot on

[petert 588]

........and don't forget to rotate the tensioners the correct direction before locking. Otherwise, the belt tension will undo them!