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68gmsee · 09-07-2017, 05:05 PM

Too many things can cause overheating. The list is fairly long but start with the easiest and cheapest first (not necessarily in order).

-Radiator cap
-Collapsing lower radiator hose (weak or internal spring rusted out).
-Clogged radiator or defective
-Sticking thermostat (test it in an old pot on the stove)
-Head gasket or crack in the head
-Not enough coolant (install an overflow tank)
-Radiator fan clutch bad (if using one)
-Install a shroud if there isn't one

There may be other causes but this gives you an idea.

09-07-2017, 05:05 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 327 overheating Too many things can cause overheating. The list is fairly long but start with the easiest and cheapest first (not necessarily in order). -Radiator cap -Collapsing lower radiator hose (weak or internal spring rusted out). -Clogged radiator or defective -Sticking thermostat (test it in an old pot on the stove) -Head gasket or crack in the head -Not enough coolant (install an overflow tank) -Radiator fan clutch bad (if using one) -Install a shroud if there isn't one There may be other causes but this gives you an idea. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...