Cooling my XJ
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Joined: Oct 2010
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Year: 1987/1989
Model: Cherokee
Engine: Straight 6 4.0l
Cooling my XJ
I have an 87 XJ and I recently upgraded my cooling system to an open type using 91 XJ parts. I've replaced the radiator, reservoir, hoses, coolant temp sensor, cooling fan switch, and I'm not running a thermostat. Then I hooked up a cargo switch for my electric fan (Yeah, pretty much wasted money on that fan switch). But I'm still runnin at approximately 210 on my gauge. Thinking about ordering me a FlowKooler higher flowing water pump to try to help keep my temperature down. Anything else I can do? Is there a way to eliminate my fan clutch to just have it constantly spinning at belt speed? Thanks
Thread Starter
Member
Joined: Oct 2010
Posts: 130
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Year: 1987/1989
Model: Cherokee
Engine: Straight 6 4.0l
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Joined: Apr 2011
Posts: 451
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From: Outside of RTP NC
Year: 1993
Model: Grand Cherokee
Engine: V8
As he said, the motor is supposed to run at 210................
That said, you need to re-install the Tstat shell, to slow the water down. Yank the guts out and put it back in. Moving the water too fast will also keep it from giving up the heat in the rad.
Ron
That said, you need to re-install the Tstat shell, to slow the water down. Yank the guts out and put it back in. Moving the water too fast will also keep it from giving up the heat in the rad.
Ron
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Joined: Aug 2009
Posts: 853
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From: Carbondale, Illinois
Year: 2000
Model: Cherokee
Engine: Inline 6
As for eliminating the clutch you can put 3 screws into the clutch itself manually lock it at belt speed but all that'll really do is kill your milage unless it's bad.
CF Veteran
Joined: Jan 2011
Posts: 2,251
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From: Missouri
Year: 1996
Model: Cherokee
Engine: 4.0HO
just do this...
well I would run the factory A/C electric fan and a 3.0 Taurus electrical fan in the stock mechanical fan shroud
then get a pair of 30 amp relays (one for each fan, easily found in 80-90s BMWs as a main relay) and a volvo 900/9000 fan switch housing (in the upper radiator hose) and a volvo radiator fan switch (91c turn on, the one in the housing turns on at like 99c - 101c)... another thing to note is that all the parts, fan, relay and thermo switch are made by Bosch! GOOD STUFF
currently I am letting the computer control the A/C fan, but the Taurus fan is on the volvo thermo switch, the truck NEVER over heats at idle, in fact it runs cooler at idle when the A/C is on, because that's when the A/C fan kicks on (it also kicks on at 215F, but my Jeep does not get that hot)
another option is the 88-95 Taurus 3.8 / 1993-1998 Lincoln Mark VIII dual speed fan, 4600CFM !!!
here is a few links
The idea to use the Taurus 3.0 fan
http://www.naxja.org/forum/showthread.php?t=1035194
the volvo thermo switch and housing idea (this will work for either fan)
http://www.gassavers.org/showpost.ph...68&postcount=4
88-95 Taurus 3.8 / 1993-1998 Lincoln Mark VIII fan... (Ford 8C607)
keep in mind this fan CAN pull up to 70 amps (SURGE) on high speed start up from a dead stop ... a simple way around that is to run 2 thermo switches, 2 relays and both fan speeds let the low speed kick in around 89C - 91C and the high speed kick in around 95C - 99C... doing this will mean that the fan is already spinning when the high speed side of the fan kicks in
NOTE: you might need to make your own shroud for this to work
Right hand drive install
http://jeep-xj.info/HowtoTaurusFanInstall1.htm
left hand drive install
http://jeep-xj.info/HowtoTaurusFanInstall2.htm
then get a pair of 30 amp relays (one for each fan, easily found in 80-90s BMWs as a main relay) and a volvo 900/9000 fan switch housing (in the upper radiator hose) and a volvo radiator fan switch (91c turn on, the one in the housing turns on at like 99c - 101c)... another thing to note is that all the parts, fan, relay and thermo switch are made by Bosch! GOOD STUFF
currently I am letting the computer control the A/C fan, but the Taurus fan is on the volvo thermo switch, the truck NEVER over heats at idle, in fact it runs cooler at idle when the A/C is on, because that's when the A/C fan kicks on (it also kicks on at 215F, but my Jeep does not get that hot)
another option is the 88-95 Taurus 3.8 / 1993-1998 Lincoln Mark VIII dual speed fan, 4600CFM !!!
here is a few links
The idea to use the Taurus 3.0 fan
http://www.naxja.org/forum/showthread.php?t=1035194
the volvo thermo switch and housing idea (this will work for either fan)
http://www.gassavers.org/showpost.ph...68&postcount=4
88-95 Taurus 3.8 / 1993-1998 Lincoln Mark VIII fan... (Ford 8C607)
keep in mind this fan CAN pull up to 70 amps (SURGE) on high speed start up from a dead stop ... a simple way around that is to run 2 thermo switches, 2 relays and both fan speeds let the low speed kick in around 89C - 91C and the high speed kick in around 95C - 99C... doing this will mean that the fan is already spinning when the high speed side of the fan kicks in
NOTE: you might need to make your own shroud for this to work
Right hand drive install
http://jeep-xj.info/HowtoTaurusFanInstall1.htm
left hand drive install
http://jeep-xj.info/HowtoTaurusFanInstall2.htm
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