Quote:
Originally Posted by GregMN
radiator
You have found it's limits of heat transfer.
Either air is blocked from flowing through it (clogged fins with leafs, debris, bugs)
or
coolant is blocked from flowing through it (clogged tubes, in the old days - recore, now - replace)
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X2 on this. Remove it and have it checked by a REPUTABLE radiator shop. Make sure the tanks are not rotted. I was able to have mine retanked a few years ago. The core was fine. A partially plugged radiator will do exactly as you describe at hwy speeds. The engine is producing more heat than the radiator can exchange to the air going across the fins and flues. OR, just replace it
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Thanks,
Mark in NC
"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi
Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
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