94 XJ overheating, help
#1
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Year: 1994
Model: Cherokee
Engine: 4.0
94 XJ overheating, help
Hello everyone, i am not new to cars or xj's for that matter. This vehicle in question is a 1994 cherokee sport, 5 speed manual 4.0 214k on the clock,. i am at wits end with this thing it has been a constant problem since 10k miles ago.. i have put over a grand in just parts. I am having issues overheating now but nothing else no sputters tap ticks or anything just overheating. Now to what all is new, ECU, all sensors on engine as well and tranny, yes all of them. fuel pump, distributor, valve cover, fuel injectors, exhaust from manifold to tail pipe, brand new. radiator, waterpump and 195 tstat and oil pump starter,,, the list goes on. also i have the rear of my hood lifted for extra ventilation. i just replaced the exhaust manifold due to a giant crack so i went ahead and did the whole exhaust, i cleaned all intake ports as well. now im overheating about 5 mins after its on im in the red, the top coolant hose is hot , WAY TO HOT and the bottom is like ice, which leads me to believe impeller issues waterpump or something. but i just replaced it not even a week ago. Guys i need your help any ideas??
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Year: 1994
Model: Cherokee
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sorry, also replaced fan clutch, DJB383 the dash gauge, i guess it could be false reading since i didnt see any boil over?
#7
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Year: 1999
Model: Cherokee
Engine: 4.0L
Verify the actual temp first. Then go from there.
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#9
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Year: 1994
Model: Cherokee
Engine: 4.0
Yeah i understand, ill get a mechanical and throw on i think i got a spare from a derby car laying around. I just had a blond moment or something. Thanks i will let you all know.
#10
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Year: 1994
Model: Cherokee
Engine: 4.0
alright so i verified, temp with my IR thermo, running at 205 solid so were good there i tried just cleaning contacts on the cluster unfortunately that was of no avail apparently now im below 260 within 30 seconds of start up, i had a couple extra water/oil gauges from some old derby cars but, they are WAY to big for this 94 xj is there a mechanical small enough? i have had no luck. Thanks guys
#11
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Most mechanical gauge sending units r huge compared to much smaller electrical gauge sending units. One is just as accurate as the other, according to AutoMeter.
#12
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Year: 1994
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yes but a new electrical gauge, anywhere but ebay etc... where it would be shipped is running around 100-180$ range cheapest being.... autozone which i hate and its some off brand for 70, i think im just going to get a sleeve for the rad hose and throw on the mechanical since im not all about spending a ton of money on something i can prob rig up. at least i know its not overheating now.
#13
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Locating the sending unit in the heater hose would be better......constant coolant flow the moment the motor starts thru the heater hose.......none to very little coolant flow thru the rad hose until the t-stat opens.
#14
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Here's an option......the 19mm sending unit/hose adapter will fit the XJ's 3/4" heater hose perfectly, and only $45, and digital display to boot.
http://www.trailtech.net/tto_temperature.html
http://www.trailtech.net/tto_temperature.html