[59safaricat]

No matter how many miles you put on your vehicle, the coolant still needs to be changed every 3 years. That includes 3 years of sitting.

[pfilean]

Sounds like your hot light is good. They are usually set to trip at 240 degrees.

If you have trouble getting het out of any setting, then I would start with replacing all vacuum lines for heater. Also, there is often a vacuum switch at the control levers which may leak and is virtually impossible to repair successfully and made from unobtanium.

The suggestions for flash the system is always a good start but also I would check to see if someone replaced the pump with one of those stamped impeller replacements. If so, throw it as far as you can and get a cast impeller model.

[PunchT37]

That fan should be roaring at 238 degrees with a little off idle speed. Check that 1`st.

[78w72]

Originally Posted by 59safaricat

No matter how many miles you put on your vehicle, the coolant still needs to be changed every 3 years. That includes 3 years of sitting.

curious where you got 3 years from... especially when sitting? is that what some mechanic thats trying to sell you a service/product said? or like the outdated 3000 miles oil change?

way too many variables to claim all coolant needs to be changed at 3 years regardless of miles, certain brands of coolants state 5 year change intervals, some are even as high as 10. most modern vehicles suggest 10 year or 100k miles for a coolant change, in classics 5 years in the norm.

https://www.walmart.com/ip/Super-Tec...e&athbdg=L1600

https://www.walmart.com/ip/Prestone-...E&gclsrc=aw.ds