Overheating!! Help!! Ideas - The 1947 - Present Chevrolet & GMC Truck Message Board Network

4x4Poet · 06-05-2006, 01:18 AM

You might try a Robert Shaw high performance thermostat. Stock replacement T-stats do restrict the flow quite a bit. This stock T-stat restriction is no problem for stock engines with low compression that have low cooling needs, but high compression engines that create a lot of heat need the coolant out of the block sooner/faster, IMO. Not so fast as with no T-stat, as you discovered, but faster nonetheless.

I knew a guy with a big block with around 9.5:1 to 10:1 compression that ran at 240-245º at idle. Installing a RS T-stat dropped the temp 10-15º at idle. Didn't solve the entire problem, but it helped.

Flowkooler sells RS T-stats along with their excellent waterpumps. Jegs and Summit also sell them rebadged as Mr. Gasket T-stats.

06-05-2006, 01:18 AM	#26
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	You might try a Robert Shaw high performance thermostat. Stock replacement T-stats do restrict the flow quite a bit. This stock T-stat restriction is no problem for stock engines with low compression that have low cooling needs, but high compression engines that create a lot of heat need the coolant out of the block sooner/faster, IMO. Not so fast as with no T-stat, as you discovered, but faster nonetheless. I knew a guy with a big block with around 9.5:1 to 10:1 compression that ran at 240-245º at idle. Installing a RS T-stat dropped the temp 10-15º at idle. Didn't solve the entire problem, but it helped. Flowkooler sells RS T-stats along with their excellent waterpumps. Jegs and Summit also sell them rebadged as Mr. Gasket T-stats. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.



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