I removed my head on my 9, cams, studs , headgasket , after removing the special tool to release belt tension , now the belt between the cam gears gets loose than tight again as i rotate the moter my hand , is this normal ??, or is my tensioner bad , i also upgraded the valve springs, not sure if that has something to do with the belt tention between the cam gears, thanks in advance for any help

 

any help ??

 

Did you take the tension off or only use the tensioner tool. It is normal to have slack on and off again as you turn the motor over by hand but nothing too crazy.

 

Well I have an 8 and I just put my cams in last weekend. When I took the valve cover off there was slack in the belt between the cams. I thought this was wierd but if you rotate the cam over with a wrench the slack is gone. The same thing happend with the new cams. When I started it with new cams it was fine. Is this normal I guess so but then again I have an 8.

 

i only used the tool , but there is quite a differenece as i rotate the moter , thanks for your input

 

any time u use a tension tool on a timing belt or replace a timing belt on a motor it WILL have a little slack in it till it runs...as long as it doesnt have enough slack to come off.. when you are done putting it together leave the timing cover off and bump the motor over a couple times and it will get tension to it.

 

thanks wizzo , i think its ok ,as the timing marks are right on

 

thanks , i will use your advice tomorrow and update

 

valve spring tension and cam lobes will sometimes try and rotate the cams backwards at certain points in crank rotation, and the intake and exhaust cam will do this at different crank angles and cause slack between the two cam gears. That's probably what you are experiencing.

 

I agree

 

thanks everyone , thats why forums like this survive,

 

No problem man. just did my cosworths a week ago .... didnt even set it to top dead center and just checked the timing when I was done.. It was dead on.. bled the lifters... had some slack on the front of the belt... bumped it over a couple times then let it run and has been roaring like a beast ever since.

 

I didnt bleed my lifters and it runs fine. Im still waiting to get it tuned though.

 

yeah but man... i work on cars all day And I would never do something like replace cams without bleeding them... when you take the cams out the bleeders are full of pressure and are stuck all the way open... if your car runs fine then more power to you.. but I have seen some bent vlaves and Fuqed up heads from stuff like that.

 

I work on BMWs all day and I agree with you but AMS said it was cool so thats what I did. If I had a bigger lift then yea maybe I would have bled them but ether I was lucky or with HKS 272 it doesnt matter.