Tensioning aux belt correctly

[Moseley]

Hi guys,

Just wondering what is the recommended way to tension an aux belt? Is there a special tool? Can it be done without a tool?

I've got a ph1 172 non-cup, but running a Pure Motorport air con delete kit. I'm concerned it is too tight, as although it isn't whining, when I just moved the car (admittedly with some semi-flat tyres) the revs were dropping to the point where it nearly cut out.

Any pointers would be welcome.

 

[boom]

It's on a preloaded tensioner so the tension shouldn't change afaik

 

[Fred@BTM]

not on the PMS kit its not, generally the longest belt run between pullies using you thumb and forefinger the belt should twist to 45deg max

 

[Cupman29]

Correct method is by frequency. But unless you have a frequency gauge then Fred's way is best. When I used a frequency gauge you realise just how tight it needs to be.

 

[Moseley]

Jeez, in that case mine is actually too loose! Was just fearing for all the bearings thinking I'd overtightened it.

Thanks for your help, will get tweaking.