Number 6 cylinder running hot

[dst1]

I was going to adjust the valves on my 70 240 I bought last year.

As a matter of course I checked the compression at the same time.

The first 5 cylinders were 185 to 187 psi at a warm to touch engine.

Number 6 was 160+ and the plug was white. Number 6 is obviously

running too hot. No oil in the water or water in the oil. I did a variation

of a leak down test and air came out number 4 plug hole. It doesn't

appear to be a head gasket (or at least the typical failure), but I am

not sure what it is. The valves did not seem really screwed up.

Anyone have any ideas? I would really appreciate it.

[Bruce Palmer]

# 6 may be lean giving you the white plug. Not uncommon for the cylinders farthest from the carbs to run leaner than the others, especially if that carb is lean already.

[ktm]

Cylinders 5 and 6 run the hottest in our cars. Read THIS thread at Hybridz regarding this issue.

[Z-Luke]

I noticed that my #6 plug is whiter than all the others as well. Is there any way to distribute fuel more evenly to this cylinder? I suppose richening the front carb would be the shotgun method.