Just removed head off Exige - as I suspected the cambelt has slipped a few notches (not unknown on the k in cold weather )- good news is no damage apparent (yet!)

Are camshaft timing marks same as for a standard K16?

Cheers all

Can't answer your question I am afraid but could you re-assure me abt slipping cambelt in cold weather?
Mine's not moved for a couple of months now. When does this problem occur? On start up?
I can't wait much longer before I fire her up for a run . . .

If you have the 190 kit correctly fitted then the standard timing marks will not line up when the engine is at 90 BTDC.

The inlet sprocket will appear to be a good few teeth out.

OTOH if you dont have the 190 kit and the crank is at 90BTDC and the timing marks dont line up then I would mke them.

I have never seen a cambelt with manual tensioner slip any teeth other than when the cambelt was hopelessly slack or the cambelt was disintegrating.

Healthy and properly tensioned cambelts shouldnt slip.

Dave

Thanks for yoour reply Dave

Cambelt appears to be properly tensioned and in good condition but inlet valves have just been catching the top of pistons (on all 4 cylinders) - suggesting that the inlet camshaft sprocket has somehow slipped the cambelt by a few notches. Exhaust valves all look fine.

It has the 190 kit fitted - as a matter of interest how do you accurately time the inlet camshaft up with the sprocket timing marks?

Cheers

Simon

You should find a new timing mark machined onto the rim of the pulley a good few teeth round from the original. This should be lined up with the marks on the exhaust pulley. to ensure it is correct I would measure the lift at TDC before starting the engine, you should have values of 120-130 thou on the inlet and 105-110 on the exhaust.

Dave

Many thanks Dave - will check tonight

Simon

No mark Dave, but your valve lift advice nails it - big thankyou

Simon

Now back up and running like a good un

Good news Simon........ now go out & celebrate with your wives!

LOL Mr P, tell you what Exige is the most fickle mistress - I love fickleness