FJ45 Overheating Issue (1 Viewer)

[1965 FJ]

Hi all,
I was after any suggestions relating to an overheating issue that I am having with my 1965 FJ45 3 speed. I have replaced the water pump, radiator, thermostat, flushed the block & installed an electric fan but when I drive on the highway the temperature climbs to 110 degrees celcius or higher. I have tested both the inlet & outlet hoses of the radiator & they appear to be the same temperature (with the old & new radiators). Any help would be appreciated

 

[Steamer]

Welcome to the forum. Some pics of the engine bay might help us spot something. Some pics outside of the engine bay would help because we just like looking at them.
First thing that comes to mind, did you properly burp the cooling system and get all the air out?

 

[John McVicker]

And what engine do you have?

 

[1965 FJ]

Welcome to the forum. Some pics of the engine bay might help us spot something. Some pics outside of the engine bay would help because we just like looking at them.
First thing that comes to mind, did you properly burp the cooling system and get all the air out?

No worries I will try & get some tonight. What is the best way to burp the system?

 

[1965 FJ]

And what engine do you have?

The number that I have been able to find is 2F265960 Thanks

 

[John McVicker]

No worries I will try & get some tonight. What is the best way to burp the system?

This is what I use…Amazon
https://www.google.com/url?sa=t&rct...p/B0BMTW1VJJ&usg=AOvVaw2P78FNAYZXKJM4rwJLsXmC

 

[65swb45]

Original 1965 radiator? 4 blade fan? Shroud?

 

[1965 FJ]

Original 1965 radiator? 4 blade fan? Shroud?

Had the original fan & I had a shroud made, when I replaced the radiator it came with an electric fan & shroud which I installed.

 

[Steamer]

What is the best way to burp the system?

That funnel John mentioned works great. Also, park on an incline with front end up, radiator cap off, and heater valve open.

 

[Cruiser Cult]

Had the original fan & I had a shroud made, when I replaced the radiator it came with an electric fan & shroud which I installed.

I think going back to the factory manual fan is the way to go. What radiator did you put in?

 

[Chungas Revenge]

This is what I use…Amazon
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjz7JSorq3_AhWyAjQIHciED7k4ChAWegQIFBAB&url=https://www.amazon.com/Nayciiy-Coolant-Radiator-Antifreeze-Adapters/dp/B0BMTW1VJJ&usg=AOvVaw2P78FNAYZXKJM4rwJLsXmC

No worries I will try & get some tonight. What is the best way to burp the system?

Great piece of kit..

 

[Subterranean Nik]

My vote, burp system. Has air in it. Had similar few years back in my brothers 40 after replacing water pump, etc…

Have purged two ways… only my method

Start truck and remove cap (before anything heats up). Do not remove a hot cap. I have filled radiator this way (only when cool) and you can see the air “burping” out.

Other way, trick I learned from an underground maint tech…assuming you have a radiator cap that be 1/2 closed but not to fully closed/sealed position, run it with cap in the first stage position where air can still escape past seal and it will purge as well. After x miles, turn cap all the way to full lock position.

But if this doesn’t sort…as mentioned above, bit more info needed.

Why the changes above? Was there an underlying overheating issue originally that electric fan, upgrade radiate, etc… were added to treat the symptom?

Was it just a preventative “while I’m in here” upgrade, etc…?

X blade fan, shroud, etc… as Mark mentioned.

Good luck! Keep us posted. Hopefully the simple burp!

Nik