Yet another "my Jeep is running hot" thread!

[mikekaz1]

yeah its roughly 216*/218* that its SUPPOSE to come on and then off at 195*/200* or something like that,  like so, mine would follow that 15*/20* start stop process. but it wouldn't start till ~250* and off at ~235* for some reason

[acerocknroll]

I fully installed the e-fan today just to see what happens, didn't hear it come on while driving to work but I'll keep an ear out. Temps do seem to slowly creep back down under heavy acceleration (which unfortunately I don't do much of driving around town) so maybe the new fan clutch is doing it's job? Did get that new cap, no change.

 

At this point I'm not really sure what else to try?

[shelbyluvv]

Rising temp under heavy throttle usually points to a collapsing lower radiator hose. Does it have the spring in it?

[acerocknroll]

Sorry, I meant that temps actually do go DOWN (slightly) under heavy throttle. And both hoses are new, lower has spring.

[Tex06]

Looks like internal resistance in the connections could be a factor.  Have you tried cleaning out your connectors?

 

http://comancheclub.com/topic/48804-electric-cooling-fan-issue/?p=496754

 

On voltage readings, corrosion can cause all kinds of havoc. 

[mikekaz1]

that's where I believe my issue is, aging connections,  although they all look decent, and my truck originally came with no E-fan,   I dunno, weird sheet.

[acerocknroll]

Yeah the wires for the ECU connector look pretty nasty so I'm sure that's not helping. I'll probably just rig up a direct switch soon.

[mikekaz1]

Yeah the wires for the ECU connector look pretty nasty so I'm sure that's not helping. I'll probably just rig up a direct switch soon.

 if you follow that link 3/4 posts up, that was my actual issue and I believe I listed what I did to bypass/ solve it also

[mikekaz1]

I tagged the end of that thread too, but then here the continuance of that(my) issue

 

http://comancheclub.com/topic/48847-reverse-light-cooling-fan-electrical-issue/

[acerocknroll]

Awesome, thank you! That is super helpful. I'm also gonna try switching the new fan clutch for a ZJ one, will report back if that helps.

[cruiser54]

http://cruiser54.com/?p=35

[xjrev10]

My setup...

Parts store special radiator

New hoses

Old school green anti freeze

Flow cooler water pump

180 degree t stat

New fan clutch

Renix with open cooling.

 

Fan is the OE fan on a manual switch. I kick the fan on at 200ish. Never seen the temp over 205 with this setup...yet. Fan is rarely needed. With this truck, I don't care about efficient operation, I want it to work. It still makes enough heat to get comfortable in the cab below 20 degrees also.