The V8 Owners Forum -

to perform a leak down test you will need a tester. There are loads of types but if you google/ebay leak tester you will see what i mean.

it works by filling the cylinder with compressed air and measuring the rate of loss.

You have to slip the air intake hose off and make sure the valves are closed on the cylinder you are testing.

If both valves are shut and you can hear air leaking through the inlet or exhust then you are looking at a valve problem but if you can hear air leaking internal of the engine it points to rings.

The tester will give a rate of leak for you to compare the each of the cylinders on the engine.

I have just carried this out on a M180 6 cylinder and had one cylinder at around 30% turned out to be valves which where not shutting due to a very warn cam.

Its well worth carrying out these tests before you pull a engine apart.

Bryan

Ah now I understand, will have a look on the e-blag and see what turns up.

Will I be wise to just get a set of new rings and a cam kit to fit anyway?

I have read loads about the fitting of stainless valves and harder valve seats for running on LPG so am assuming that this would be a good idea too, and I think it wise to get it all done at same time as I cant see the point in messing about with the engine on a bi-weekly basis!!!

Funny question this but would I need to fit a new drive gear to the dizzy on fitting a new cam?

dieseldog69 wrote: Funny question this but would I need to fit a new drive gear to the dizzy on fitting a new cam?

If the drive gear is not showing signs of wear then there is no need to fit a new one.
Cheers Denis