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Thread: Cambelt tension

  1. #1
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    Default Cambelt tension

    I have be looking at the "how 2" on replacing the cambelt on CDTi 150. I think I should be able to do it myself, if I invested in a few more tools. Only thing bothering me is setting the tension, do I tighten up fully first, turn engine by hand and then loosen off? How much do I loosen off?
    Cheers

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    Regular Member costalot's Avatar
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    Hi pal have a look at HOW 2 there is a section on cam belt changing' me personly I would not be able to looooks like nit going to cost me

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    Regular Member platty's Avatar
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    Hi Melvin, setting the tension is easy, on the tensioner there is an arrow that you line up with a hole. On first fit you set the tensioner so that the arrow is just above the hole, then give the engine a turn by hand and check tensioner again. You should see that the arrow has dropped. Set the tensioner again, this time line the arrow up with the hole, give the engine another turn by hand and re-check. If the arrow is still lined up your good to go, if it's moved repeat the process above. You can see the hole and the arrow in the picture below.

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    Hi Platty,
    Thanks for your reply. Sounds easy enough.
    One other thing I read on another thread here that there are NO aligmment marks on the 1.9cdti z19dth 16 valve engine and that you NEED the locking kit.
    I know if there are no marks present you could make your own before removing the old belt.
    Can it be done easy enough without the locking kit?

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    Regular Member platty's Avatar
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    When I changed mine i used the lock up kit, but this was because 1, I had never done a timing belt before and 2, my timing belt had snapped because of a seized waterpump.

    I guess it depends how confident you are, I think from memory there are timing marks but they dont relate to TDC not a big deal if your timing belt is still in one piece. There are definitley marks on the pulleys because these get lined up with marks on the timing belt. As you said you could make your own marks as well. You only have to mark the cam shaft and the crankshaft the fuel pump pulley doesn't matter.

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    Regular Member DaveW555's Avatar
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    There is timing marks but they are to line up with marks on the belt so are pretty useless if youre not going to use the locking tool, a bottle of tippex will do the trick and dont worry about timing up the fuel pump as it can be anywhere, its just the crank and cam that need to be timed.

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    Regular Member the-wizard's Avatar
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    Vehicle : vectra-c

    Trim : sri

    Engine : cdti

    Year : 2004

    Mileage : 98,000

    Default

    I found this job fairly easy, but ive done a few belts before, I used the sealy locking kit & found it brilliant!, IF! you fit the belt correctly this kit will guarantee the timing is correct, when you strip it mark the r/h side of the old belt on the cam & crank pulleys & belt, transfer the marks exactly the same amount of teeth apart onto the new belt, fit it to the cam first then the crank NOT THE IDLE PULLEY YET, making sure you have the marks lined up, hold the belt in place top & bottom whilst pulling the belt tight over the idle pulley (its tight), you may need help or it can be carefully wedged to hold in place, then fit to the rest, when you fit the tight (r/h) side like this with the locking kit on everything else is easy, just adjust the tension as said before. ill pm you a contact for a cheaper locking tool, there normally £46 .

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    Thanks for all replies, and to The Wizard for the PM. I think I should replace the drivebelt too when I'm at it, is it ok to use old tensioner here and is there a setting on this tensioner also.
    Thanks

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