A brief update: no ATF fluid (I changed the vacuum modulator not too long ago). Pulled the plugs today and checked the compression again - all cylinders were 140 - 150 psi, except for #4, which was 120 psi. The plug for that cylinder also definitely looked different (a little blistered, looked hot) from the other 5. Added a little oil to that cylinder and did a 'wet test' and compression increased to 145-150 psi.

Contrary to what I said earlier, I don't know if I am buring oil or coolant now. I checked the oil and I am using less than ever - probably 1/2 quart over the past 1100 miles, which I don't think is too bad. But, I checked the coolant level and it is down an inch or 2 from the top. I am thinking a leaking head gasket and that I am getting water in to cylinder #4.

Any thoughts?

Can someone give me the general procedure for pulling the head - do I have to remove intake/exhaust manifold first, etc.? If I have to do that, I'm just hoping I don't have to plane it. I don't think I have enough of the head left to do that - I know it's been done at least once before.


Thanks,Ryan

__________________
RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE