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Old 12-29-2011, 01:14 PM
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Re: 01 Jimmy w/a strange coolant leak

Quote:
Originally Posted by km2002 View Post
In order:
Generally, no; gauge usually up near 210 (the 12:00 marking), but not over
Coolant level varies, both in rad and in tank
Yes
Not that I can tell; usually don't fill above fill level mark (anything else comes from vehicle)
AFAIK, altho I've never run into a rad whose cap comes off so easily, even when hot (and no, it's not blowing all over me if I pull it hot)
Doesn't seem to heat up real fast under any operating conditions; but what do you mean?
I've only noticed it usually sitting still w/o engine running, strangely; it has done it one other time at idle
Yes; none found. Friend who works on classic roadsters opined leaking head gasket. But not noticing oil in coolant or anything similar.
210 is to hot.
Only 2 degrees below boiling point with no pressure on colant system.
I would start with a new rad/coolant cap and new stat.
And make sure fan clutch is working good and rad air flow good and rad clean.

Head gaskets can leak without water in oil.

Is it heats up fast on a long hard pull or heavey foot on gas points to head gasket,
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