Hello everyone. So my 2005 mini cooper s jumped a tooth. I was trying to find TDC but I have a small problem that I just can't seem to understand. I removed the tensioner and when I turn the crank with my socket, valves move but my can sprocket just kind of jumps but stays in the same place. So the crank turn a but the cam stays in place. Any ideas? Am I doing something wrong? Now, if I turn it counter clockwise then the sprocket on the can does turn but if I go clockwise it doesn't, only the crank moves

 

you will need to remove the front timing cover and line the colored links on the chain with the dots on the gears.....service manual should have the proper instructions

Bryan

 

A383WING but is there a reason why the can sprocket doesng rotate? Shouldn't it rotate whenever I rotate the crank?

 

1--Not sure why you want TDC...Timing setup doesn't use it. You need to remove the front cover/oil pump and use the marks on the crank and CAM sprocket and the copper links on the chain.
2--Not sure how the valves are moving if the CAM isn't turning???
3--With the tensioner out the chain is likely slipping on the crank sproket or it's just the slack in the chain...how far are you turning the crank?? Put the tensioner back in and try turning it a little (maybe 45 deg) in each direction and see what the CAM does....DON'T force it...if you feel any resistance the piston may be hitting a valve!!!

 

you might have slack in the timing chain, due to broken guide rails, or a collapsed tensioner....unless the chain is completely tight, you will get to move the crank without the cam moving, just don't move it too far.....

you need to take the front cover off as already mentioned and do the job right....make sure your guide rails are not broken, common problem....if you don't have a service manual, get one, you can't work on the car without one. Relying on Internet forums to repair your car is not always the best thing if you are not very mechanically inclined.....sorry for being blunt

Bryan

 

OK so I have a quick question, I took everything apart which was a PITA and alight the two crank markings and the can marking with those in the new chain. After putting everything back together I turned it on and lost timing again... There just seems to be a lot of slack in the chain. So my question is, is there a way to make the tensioner piston open before turning the car on so the chain stays nice and tight and doesn't jump any teeth do to the slack?

 

Before you put the timing cover back on...you should have installed the tensioner and pushed the guide rail against the tensioner...(acts like a touch latch on a cupboard door) that would open the tensioner fully. If you tried to run the car, it's best to start over again.

At this point you can remove the tensioner plug and activate it by pushing the plunger in and it should get significantly longer. It will be a little difficult to reinstall the plug, but it can be done. If you have an old one, play with it first...you can get it to lock in the retracted position as well.

You should get a BENTLEY MANUAL...before doing any other DIY repairs..it's going to cost you an engine soon if you just keep doing your own thing.

BTW IT IS A CAM..NOT A CAN

 

What if any work did you do to the head? You shouldn't turn the crank without the tensioner installed.