Quote Originally Posted by huff View Post
I'm not expert on cooling at all. But isn't it weird that the 160 tstat runs hotter than the 180?

Anyhow, I would probably just keep the thermostat out for the rest of the summer.


Also, for your radiator - do you have a shroud to direct the flow of air to the fan?

I imagine that at higher speeds/ higher rpms, that the electric fan might actually be a restriction for the air being pulled by the mechanical fan.


I don't follow your reasoning of why you suspect a cracked head from the fact that coolant flows fast... (Or do you mean that coolant is exiting the system and moving to the environment, which yeah, would be a bit of a problem, lol.) Is there white steam coming out of the exhaust? Or is there foamy oil on the dipstick? Those are the symptoms I know about that indicate a cracked head.


I'm guessing that if you have a methanol injection system, you probably already know a lot more than I do about this stuff, but those are my suggestions.
I am not losing coolant, however when i had a cracked head on my G54 i did not lose any either. Yes there is a shroud on the clutch fan. The electric fan is a factory fan, the clutch fan is not lol.

My thought on the 160 is, once its warmed up, the stat stays open, and it is to much flow restriction for the coolant to cool off.
No steam or coolant loss, i am thinking i am pushing compression into the radiator maybe? i have not put a combustion gas checker on the rad yet