2.0 litre Rover 75 engines - Page 3

sean75 · 8th February 2021, 20:59

Quote:

Originally Posted by trikey

Not releasing the tension? How did he change the belts then?

I believe it happened as ,whilst re-assembling the engine after changing the cam-belt the operative damaged the thread which secures the cam drive gear to the camshaft.

SD1too · 9th February 2021, 07:38

Quote:

Originally Posted by SD1too

Due, no doubt, to ham-fisted maintenance .

Quote:

Originally Posted by sean75

I believe it happened as ,whilst re-assembling the engine after changing the cam-belt the operative damaged the thread which secures the cam drive gear to the camshaft.

Well Andy, I'm pleased to see that I wasn't entirely wrong!

Simon

chris75 · 9th February 2021, 11:28

Quote:

Originally Posted by Bolin

Hi Andy, is this problem more frequent with the 2.0 or does it affect the 2.5 as well? (given the cams themselves are different).

The cam profiles are indeed different but I believe the shafts are identical . They certainly look it

The metal of the shafts is really brittle and is especially at risk on the ends where they have been machined out and made thinner . If you are not using the special tools , be very careful how you hold / restrain them if the sprockets are off....

Bolin · 9th February 2021, 11:37

Quote:

Originally Posted by trikey

I’ve never seen it on the 2.5, I suspect a dodgy batch of cams, but that’s just a guess!!

Thank you Andy, I hope then it was just a bad batch - the only other (very rare) cases I have read of relate to problems after changing the belts which obviously can't be so if they've not been changed.

So it would seem there are at least 2 causes of this failure, but it is still not a common problem