Alright, I am going to be as detailed as possible in describing my issues so that I can solicit as helpful feedback as possible.
My car is a 93 XJ with the stock 4.0L HO (other than a 01 intake manifold and injectors). I recently did a whole slew of upgrades.
Pertinent upgrades and notes:
-Eliminated mechanical fan an installed 2 - 10" fans and 1 9" fan, all electrical. All set up as pullers.
-Installed adjustable thermostat to get fans to kick on at a good temp.
-Installed new 2-row radiator
-Installed an adjustable radiator pipe restrictor as talked about:
Radiator Restrictor
note: this has been set to full open during my recent issues
-Installed aftermarket coolant temp sensor in the stock location in the head, and installed a brand new stock sensor in the heater pipe in the same location as the probe for the adjustable thermostat
-Installed tranny cooler in front of the passenger side of the radiator - same as stock location, though this cooler may be a tad bit bigger.
-Water pump replaced less than 15k ago
-New Stant Superstat 195* thermostat
-Engine compression is good, not losing any coolant.
Issues:
-This setup worked great during the winter and early spring, but now that temps are hitting 80-90 degrees here, my cooling system temperature seems to just rise out of control, even with the fans on.
-At highway speeds temps are just fine, issues are seen only when idling after the car has been driven for a while and is nice and hot.
Questions:
-Here is the weird thing. Temps on the head only reach around 208* at worst, but the temps from the heater pipe, on the stock sensor/gauge, seem to indicate like 225*+. Which one should I go by? Heater pipe seems to be about 10-15 degrees higher.
-Should I not be worried, since temps on the head still stay under 210? When I'm moving on the freeway they stay right around 195. I haven't even started to use my A/C yet, I imagine that will only make the problem much worse. Turning on the heat helps, but this is obviously a bit uncomfortable.
-Has that big trans cooler killed the air flow through my radiator?
-What can I do to fix this? Install pusher fans in front, in addition to the puller fans? Will that do anything? Vent in the hood? That seems unecessary.
I'm just sort of at a loss as to what the obvious fix is here. Any help or suggestions are greatly appreciated!
Pictures:
This is an example of the temp taken from the head:
This is the temp from the heater pipe:
E Fans:
Restrictor:
Thermostat probe and location of stock sensor (grounded):
Engine Bay:
Grille area, you can see the trans cooler:
My car is a 93 XJ with the stock 4.0L HO (other than a 01 intake manifold and injectors). I recently did a whole slew of upgrades.
Pertinent upgrades and notes:
-Eliminated mechanical fan an installed 2 - 10" fans and 1 9" fan, all electrical. All set up as pullers.
-Installed adjustable thermostat to get fans to kick on at a good temp.
-Installed new 2-row radiator
-Installed an adjustable radiator pipe restrictor as talked about:
Radiator Restrictor
note: this has been set to full open during my recent issues
-Installed aftermarket coolant temp sensor in the stock location in the head, and installed a brand new stock sensor in the heater pipe in the same location as the probe for the adjustable thermostat
-Installed tranny cooler in front of the passenger side of the radiator - same as stock location, though this cooler may be a tad bit bigger.
-Water pump replaced less than 15k ago
-New Stant Superstat 195* thermostat
-Engine compression is good, not losing any coolant.
Issues:
-This setup worked great during the winter and early spring, but now that temps are hitting 80-90 degrees here, my cooling system temperature seems to just rise out of control, even with the fans on.
-At highway speeds temps are just fine, issues are seen only when idling after the car has been driven for a while and is nice and hot.
Questions:
-Here is the weird thing. Temps on the head only reach around 208* at worst, but the temps from the heater pipe, on the stock sensor/gauge, seem to indicate like 225*+. Which one should I go by? Heater pipe seems to be about 10-15 degrees higher.
-Should I not be worried, since temps on the head still stay under 210? When I'm moving on the freeway they stay right around 195. I haven't even started to use my A/C yet, I imagine that will only make the problem much worse. Turning on the heat helps, but this is obviously a bit uncomfortable.
-Has that big trans cooler killed the air flow through my radiator?
-What can I do to fix this? Install pusher fans in front, in addition to the puller fans? Will that do anything? Vent in the hood? That seems unecessary.
I'm just sort of at a loss as to what the obvious fix is here. Any help or suggestions are greatly appreciated!
Pictures:
This is an example of the temp taken from the head:
This is the temp from the heater pipe:
E Fans:
Restrictor:
Thermostat probe and location of stock sensor (grounded):
Engine Bay:
Grille area, you can see the trans cooler: