[MR2] MK1 Cooling System Problem

[Kurt Krueger]

-------------- Original message ----------------------
From: "Bob Schultz" <bob-schultz at comcast.net>
>
> Your Radiator cap could still be the problem... I have had a bunch of
> defective even brand name caps.
> If it isn't the cap, check out the sealing area on the filler neck,  a chip
> there (and I have seen it) will prevent the cap from sealing.
> 
> If that doesn't seem to be a problem, then you have a leak in the system
> somewhere... it may be a small one but it is preventing the system from
> going into a vacuum when it cools down. 

When the engine cools, you should have a noticeable vacuum when you
remove the radiator cap.

Some potential leak spot are the bleeder valves and the radiator drains.