Bought and 08 clubman 2 with dead #3 cylinder. Melted pistonand scored cylinder wall. Had cylinder sleeved and new piston and full set rings and bearings. With new timing chain set. Started and ran great about twenty minutes and stalled . No compression. All 8 exhaust valves bent. Install new valves and thought incorrect crank bolt torque was at fault for jumped toming 100 degrees not 180. So started up and twenty minutes later stall .....no compression....all 8 bent again..installed cam tools and found exhaust cam out and gear spun on cam. Teardown found vacuum pump hydrolocked with oil. So 8 more valves and a new pump. Running 20 minutes and stall . No compression. Went to check timing and crank bolt is loose....now i torqued it right....180 with a tech angle torque wrench and a few more......why did it back out....help

 

the crank shaft bolt needs to be torqued at 80 Nm + 180 deg. I would add medium strength thread lock.

the cam shafts also need to be torqued correct. i THINK it is 30Nm + 150 degree.

The way i do it is that after the chain goes in place, i leave the cam sprockets loose. tighten the chain tensioner bolt first, then tighten the cam bolts.

are you using the locking tools?

where are you located?

 

I'm having this exact same issue with my 2008 Clubman S. I haven't bent any valves yet, but the timing does slip just enough to start pinging about five minutes after start-up. I'm on my third set of timing sprocket bolts and they just won't stay tight. Next I'll try the thread lock. I hope someone else comes up with a reason why or a solution soon. I've been without my car for nearly five months.

 

timing is passing quick wow...

anyhow, how much did you torque it?

 

Without the Bentley in front of me I couldn't tell you exactly. I know the the torque was the same for the exhaust and intake sprockets, except the intake had an additional 180 degrees and the exhaust just 90.

There is a possibility my camshaft caps are too tight. I had to best-guess them with the torque wrench I had on hand. But they seemed to be just a tad over hand-tight and that scared me a bit.

I have another set of bolts coming via amazon in the next couple days. This time I'm going to mark the bolt, sprocket, and cam positions with paint to see where things are slipping if it happens again.

 

the caps i think are 9nm with 90 deg. i could be slightly off. but yeah they seem no "too tight". the caps arent the issue i think, it is the sprocket bolts. If you have ISTA/D, you can look the torques and procedure up.