sgian
Valued Contributor
Posts: 4438
Loc: MO
Reg: 12-25-03
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06-29-12 03:52 AM - Post#2242498
In response to bobb
Flex fans can kill you when they fail, that is why the major automakers stopped using them in the 70's. However, that is not the overheating problem.
Stock temp is 195* F. At 160*, it is too cold and you are increasing the cylinder wall wear unnecessarily. I wouldn't be concerned until it got over 210*.
Running hot under 30 mph is usually an air flow or coolant flow issue, but it sounds to me like you have it all set up good. You might benefit from a radiator that has more surface area, but you would probably have to do some mods. What's the surface area of the radiator core? You probably already know it is length times width of the core area to find the result.
Last thought, are the heads specifically for a 400? Or are they heads designed for a 350? 400 heads have more coolant holes drilled in them.
| 04 Silverado Z71, 10 Cobalt |
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drtyler (4)
