m38 thermostat

baios · Post by **baios** » Fri Oct 30, 2015 9:06 am

Today I decided to clean the radiator because the M38 had problems with overheating. After cleaning and change the thermostat, noticed after 20 minutes of idling the temperature rose to 170 and remained there.so ok i think i solve it. quote pictures from the old thermostat that has his black crap full of rust. from what was believed to be? I've put distilled water this time and antifreeze.

4x4M38 · Post by **4x4M38** » Fri Oct 30, 2015 9:32 am

When you cleaned the radiator how did you do it?

If you have that kind of crud in the thermostat and well,
and the radiator, your block most likely has it in the nooks
and crannies as well.

Take care,

baios · Post by **baios** » Fri Oct 30, 2015 12:49 pm

i got my radiator cleaned by a professional shop that do that job. how can i find if the block has a problem. i have change all the engine parts!!!!!!!!!!!!!!! when i restore it

4x4M38 · Post by **4x4M38** » Fri Oct 30, 2015 3:20 pm

Hi Balos,
Run your jeep over to that radiator shop and have them do a
system back flush. This usually is a pressure rinse in the
opposite direction of normal water flow.

Theoretically this has the advantage of moving the fluid
against the buildup and helps clean the block and fittings.
I believe they can also use a chemical that will help.

It might cost you additional money but if you took the time
to have the radiator cleaned the engine will benefit as well.
Once done you should be good for some time.

Take care,

4x4M38 · Post by **4x4M38** » Fri Oct 30, 2015 3:30 pm

Baios,
Sorry about the spelling!

I am surprised you have so much crud in your system in only
three years.