L series timing belt tensioning

Cliff R · Post by **Cliff R** » Sat Jun 02, 2012 11:50 am

When I put the new timing belts on the L series I was not entirely happy with the amount of tension I put on the belts.
It is supposed to be something like 25Nm with the tensioners loosened off and with the tension applied to each belt the tensioner springs take up the slack and then they are tightened.
I have 3 tension wrenches of various ranges but 2 of them do not do left hand tensioning and do not have a ratchet head. The 3rd wrench I thought could do LH tensions but while it has a wratchet it does not do the LH tension which must be done especially on the LH belt.
I basically got the feel for what 25Nm felt like and then applied this in the left hand direction on the cam pulley till it felt "right".
Is there a better method to achieve the right tension on both belts ?
I dont want to over tighten the belts which will reduce their life.

steptoe · Post by **steptoe** » Sat Jun 02, 2012 6:01 pm

I thought my torque wrench was both left and right coz it has a ratchet, with a flip direction thing on it, but common sense afterwards comfirmed it is only right handed , no good for either belt ?? You just develop a feel for them, like a tight drive belt. Think if too tight you get a vrrrvrrrr sorta noise, I think

Cliff R · Post by **Cliff R** » Sun Jun 03, 2012 9:48 am

I will do some more research. I think REPCO do a LH and RH tension wrench but it would be expensive.
I am known for destroying tap washers in our house as I seem to have a very heavy hand. This make me very aware of any "feel" I have.