Engine cooling

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Oct 31, 2012 | 09:43 PM

#21

texas jim

Racer

Joined: Oct 2003

Posts: 424

Likes: 9

From: Killeen Texas

Quote:

Originally Posted by gbvette62

I'm pretty sure that your 77 was designed to run around 210.

By the late 70's, all cars were using a 190 thermostat and had a normal operating temperature around 210. This was done to help reach the Federally mandated emission levels. The higher operating temps, help burn off the emissions more thoroughly.

I do remember the SBC running at a higher temp after the smog systems were coming on them, even mid '70s. I remember first seeing the 200 plus temp on the gauge in the new vehicles and asking about it. Ofcourse you need some temp so that the components swell properly/correctly, but I'd say that 160 to 180 gets it. Used to in the older ones. I realize that the new engines run much cleaner, but I can't help loving the older ones.

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