ok guys..my jk been ovee heating at low speeds, fan seems to be running constant. .I just shut it off becuase reaching red line...any ideas?

 

Been in muddy water?

If you have, and cleaned the radiator fins, but didn't remove the radiator to clean it thoroughly, you need to do so.

Otherwise, verify the temp is actually high with an infrared temp gun pointed at the base of the thermostat housing, between it and the temp sensor.

If the temp is actually high, I would suspect dirty radiator fins, low coolant level, stuck thermostat, to name a few things.

 

That happened to me. Radiator was so clogged with mud there was not enough air flow.
I let it cool down and cleaned it with a hose. No more problem.

 

ya I was burrued in mud about 5 days ago..I have washed the rad but will try that again.

I owned a s10 blazer before and I replaced thermostats multiple times in its 5year life with me..could that be the problem? its a east fix

 

If you been playing in the mud or muddy water and never clean your radiator,guess what.Been there and took many weeks to get it all out.Could be just a stuck thermostat too

 

I would look into the mud in the radiator first. If you have an A/C condenser in front of the radiator, you may have to remove it or the radiator to completely clean them.

 

ya I have the ac condenser in the front...im also runnin screen door mesh over the slots. .so I suspect inside

 

here is a pic of egine bay before I hosed it down with spot free rince

 

That information should have been in the first post.

 

thanks for letting me pic your brains guys. .il try washing rad again both sides and follow up.