I'm getting great cooling at idle 180* water 160* oil but at highway speeds it jumps to 200-220* water 180-200* oil. The rad is cold to the touch when I stop. Could this be the thermostat flowing too much at higher RPM? Car has a brand new 3 core rad, with an electric fan. Engine is a recently rebuilt 464 Stage-1.
Double check for air in the system. Stock water pump? I've seen the impeller spin on the shaft reducing blade speed of pump itself. Kelly.
If the rad is cold to the touch, there is no coolant flowing through it. Either your water pump is toast, or the thermostat isn't opening.
Might be the case, I've got an old pump on there now (the new one split in 2). I'll be trying the pump and thermostat next up.
A therm is like a door Either open or closed. A 60 deg will ONLY open sooner than an 80, not flow MORE. Unless I got that wrong.... But if the 60 deg was not opening, you would definitely have known... Side note, I had a 427 vette that used to suck the rubber hoses closed, restricting the flow. That is until I removed them and installed those springs. Never had another problem after that.:Smarty:
Hey Clint, 210 is normal for me!:grin: The thing that helped my overheating issue was the Crane vac advance kit. The carb was basically sucking unrestricted air through the broken vac canister making it too lean at speeds and also my timing was retarded when at speed. After I installed the kit and played around with different springs it brought my temps down. But you have a cold rad. Probably unrelated. MARK
Dan, Should have mentioned that it's a hi-flow 160* thermostat. Larger opening basically. The hoses are staying open, good idea though! Mark, Glad to hear you got it resolved!! Most BBB Regals run hot so I may be just paranoid. Still going to play with it though. The advance and mixture was set during a 3-day dyno session and is dialled in spot on... I was kind of hoping it was something like that but when I rechecked timing no luck.
Mine cruises between 200-210. It was running at 160 when I first got the car; Then I realized #8 exhaust valve was never closing...previous owner had adjusted the roller rockers incorrectly.
Well, i tried `er this weekend. One vaccum leak fixed (20*), one bottle of water wetter (5*) and one air dam (10*). She's cruising between 190* and 210* depending on load. At 60 MPH on the highway she jump up to about 220* oil temp (200* water temp) so I'll have to put on the oil cooler for highway use. Also thinking about a bigger rad after seeing the difference that the air dam made!
