timing belt keeps going lose b18


E

ek4vti

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Jul 13, 2012
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hi I am using a new timing belt and in the last 400 miles I have had to take the slack off the front 5 times!!
What am I doing wrong?
Am i meant to leave the tensioner slightly lose or torque it up i do torque it up
 
Make a step by step guide on how you've done the timing belt kit. It mite make it easier to point out where/if you've gone wrong.
 
Well engine was out of the time of putting it on the first time
Locked the cams with the holes
lined tdc With the markings
Put belt on
Between exhaust cam and crank pully was tight
Rotated crank anti clockwise twice checked timing again and tightened tensioner
 
Coat hanger does the trick for me when tensioning the cam belt, dont leave the bolt loose torque it up properly.
 
There's a method for getting the right tension. With the tensioner not touching the timing belt i.e push the tensioner away and nip the bolt to hold it, get timing belt on and all timing marks in the correct position.

Release the tensioner so it springs into position (don't tighten the bolt yet). Going counter clock wise, turn the crank so that 3 teeth on cam sprockets pass, then torque the tensioner bolt up (40nm I think).

Turn the crank over two full revolutions by hand. Get the timings maks back in line and loosen the tensioner bolt. Again turn the crank so that 3 teeth on the cam sprockets pass. Torque the bolt back up and do another two full revolutions and check the timing marks are correct.

I did this following Autodata and haven't had a problem with it.
 
isn't it just the slack that there is normally sepossed to be ???
If you push on the belt above between the 2 cam wheels with your finger there is always like 1 cm or 1.5 cm movement
 
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just thought at my problem i had with the tensionner.
just loosen the tensionner-bolt 180° and no further if you go back three teeth,or it can't hold tension.
then torque adjusting bolt again
 
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I've never had this problem before can't see what I'm doing different to previous times,
Will try these out and pull tensioner up/down with something see how that goes
Thank you chaps, :)
 
It is an adl blue print one tensioner,
Done the above audodata method and pulled the tensioner with a hanger
My torque wrench won't fit down the gap but it is tight,
so will see if it goes slack again,
Could it be down to the high compression or the cam timing?
 
measure slack at front of the engine should be 1/2''
double check with manual !
 
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