Evan’s waterless coolant

[1967bperko]

I’ve had the cooling system thoroughly flushed and treated 2 times, so as to properly use Evan’s waterless coolant in my 1967Charger 383 4 barrel engine.All components of the cooling system are new including a 26 inch large tube aluminum radiator, new flow kooler water pump,new fan clutch and a new160 thermostat.For now I have the heater core bypassed . I‘ve bleed the air out of the cooling system.When I start out the engine is warm and the temperature is normal,after driving about 40 miles on the highway the temperature starts to go up to between half and three quarters,then I get off the highway and drive on a rural road and then the temperature goes back down to normal,about 1/3 of the way up on the factory gauge. Why is the engine temperature fluctuating like this.Please advise,Thanks Bob

 

[WileE]

More engine rpm... more heat into the cooling system.

 

[pnora]

I’ve had the cooling system thoroughly flushed and treated 2 times, so as to properly use Evan’s waterless coolant in my 1967Charger 383 4 barrel engine.All components of the cooling system are new including a 26 inch large tube aluminum radiator, new flow kooler water pump,new fan clutch and a new160 thermostat.For now I have the heater core bypassed . I‘ve bleed the air out of the cooling system.When I start out the engine is warm and the temperature is normal,after driving about 40 miles on the highway the temperature starts to go up to between half and three quarters,then I get off the highway and drive on a rural road and then the temperature goes back down to normal,about 1/3 of the way up on the factory gauge. Why is the engine temperature fluctuating like this.Please advise,Thanks Bob

Are you running a shroud? Factory gauge? If so verify its accuracy.

 

[1967bperko]

I’m using the factory shroud, I am using a factory gauge. I forgot to mention that I did remove the drain plugs on the sides of the block when the flushes were done.

 

[Kern Dog]

First, I wouldn't use Evans "coolant" in anything. It is wasted money when for close to 100 years, ethylene glycol based coolants have worked for a fraction of the price.
I'm not a purist but in most cases, duplicating the factory setup results in reliable service. 26" radiator, a fan shroud, 7 blade fan with a thermo drive clutch and position the fan half way into the shroud. This has worked for decades.
Evans can't be mixed with anything, including water. It is expensive. I wouldn't use it if were free.
If a gauge is functioning properly, the only reason that I figure for it to fluctuate is a low coolant level where the sending unit temporarily sees open voids where no coolant passes through, only steam. That will register a higher number.

 

[pnora]

I’m using the factory shroud, I am using a factory gauge. I forgot to mention that I did remove the drain plugs on the sides of the block when the flushes were done.

Verify that your gauge is accurate.

 

[1967bperko]

Thanks I will check if the gauge is accurate.

 

[Curiousyellow71]

Quality of thermostats these days is poor, it could be a restriction by not opening enough....or possibly the lower hose is getting sucked shut at the higher rpms down the highway?
We've found in some performance applications...Evans is far superior to anything else.

 

[Geoff 2]

Project Farm You Tube did a recent test on coolant improvers. From memory, Evans did NOT do well.

 

[Mopar Hunter]

Evan’s waterless coolant is snake oil.

 

[MWbirdLOVER70]

Quality of thermostats these days is poor, it could be a restriction by not opening enough....or possibly the lower hose is getting sucked shut at the higher rpms down the highway?
We've found in some performance applications...Evans is far superior to anything else.

I always run a spring in the lower hose to take collapsing bottom hose factor out of the equation