Getting Hott Again

[NA86.5]

So heres the info I drove my car on the highway for about 25 miles striaght at about 70 mph. Then when I got to my destination its a small city go and stop and all of a sudden my car starts getting hott?:aigo: So I get to my place of business and then leave get back on the highway and it never gets hott on the highway. When I get back to my hometown it starts getting hott in the stop and go traffic. Which cause me to rev up my car and temp will go down any help will be nice. Iam getting ready to throw the towel in with my NA.
PS I replaced all these parts about two years ago
Water pump,Rotted out the Radiator,New themrstat about two months ago along with a new raditor cap?

 

[Facime]

sounds like the fan clutch is bad. With the engine hot and shut off, pop the hood and try to spin the fan with your hand. if it spins real easy the clutch is probably shot.

When traveling at highway speeds your motor is getting cooled by the air rushing in naturally. When you hit stop and go, the fan isnt moving enough air to keep the thing cool.

Either change it out for stock or wire up an electric fan. That should solve the problem.

 

[starscream5000]

Has there ever been a hg change on the car? If not, could be a BHG.

 

[NA86.5]

Yes I replaced the HG two years ago thanks for the info Ill try the fan clutch.

 

[Facime]

People are so quick to jump on that BHG issue. Sure its a real problem, but rule out the easy stuff first. Certainly if he continues to heat cycle that motor that way its not gonna help it at all, but there is no reason to jump on the BHG bandwagon just yet.

His symtoms are completely explained by a bad fan clutch.

 

[starscream5000]

If the fan clutch is good it should spin a little for like half a sec and then slow down and stop fast right? The reason I ask this because that's what mine does.

 

[Yellow 13]

Not having a fan shroud can cause this as well, but its most likely the fan clutch.

 

[rumptis]

a cloged RAD could do this as well. But I would say fan Clutch would be the first thing to check.

 

[Kai]

Thermoviscous fans are problematic - and i've just bought an electric fan for mine - much less hassle. At least with Supra's you dont have to use a 36mm thin cranked spanner like i had to on my old Ford Sierra XR4x4 - that was a pain in the ass!!