My used 4 cyl jeep radiator would only drain 1/2 of the fluid. jumped up and down on bumper and this dislodged the sludge in radiator and/or engine. flushed twice, then now notice low temp reading on gauge (out of specs) due to a low temp thermostat that someone installed due to previous over heating (sludge). Replace with factor spec thermostat and everything is fine.
SOURCE: 2001 JEEP ..RADIATOR IS COLD
The water temp is 195-210 degrees..the hoses are hot that go into the radiator..but the radiator itself is still cold?
SOURCE: 1999 jeep wrangler very little heat
YOUR RADIATOR HAS TRAPPED AIR IN IT AND NEEDS T BE "BURPED".
SOURCE: 99 jeep cherokee problem w/ heat
It could be a flap but more likely you have a air trapped in the heater core or the hoses connecting the heater core when refilled the system after your repair.
Loosen the supply hose that go to the heater core at the highest point and run engine until coolant comes out.
SOURCE: My Jeep is leaking antifreeze. My water pump was
Well you have 2 heater hoses that contain antifreeze then the top and bottom radiatior hose most likely at the end of a hose where it connects to the motor has a crack on it
SOURCE: Over heating. Radiator = 1 yr old. Head rebuilt
Try replacing the thermostat first. If it's new with the head job then try removing it altogether and see if that helps. New ones can go bad. Make sure it is installed with the coil down in the engine.
Is there any chance that silicone or form-a-gasket was used in the rebuild especially around a water jacket? Silicone can break off after the part is tightened and could be plugging a water passage.
When you redid the head was there a choice of more than one head gasket and did you compare the new with the old to be sure it was an exact duplicate? I would be extremely suspicious of either the wro ng head gasket or it being up side down.Either of these could block water passages and create your problem. Hope this helps.
Fixed problem HERE........................
We changed thermostat, belts, water pump, hoses... you name it we changed it nothing worked. Just before we ordered a new radiator I took a few pics sent them to my dad and instantly he said to remove the bleeder bolt then fill radiator. That's it guys months of overheating a lot of money and hours of work when in the end it was so simple, cost nothing and took 2 mins.
Turns out most the Nissan motors have a type of bleeder bolt or something (not sure what its called exactly) on top of the motor and that should be removed while filling radiator. step 1 wait till engine is cooled down all the way. step 2 remove radiator cap. step 3 remove the bleeder bolt on top of motor (look around for it. Its just a little old bolt all alone) step 4 slowly fill radiator until coolant/water to come out of the bleeder hole. step 5 put bleeder bolt back in. step 6 put radiator cap back on. That's it. Good luck
if you do not do these steps air get caught in the system and when heated turns to steam. and your radiator cant circulate that steam because the hot air raises. The steam will just sit at the top of the motor and block the coolant/water from circulating through the radiator like it should. Without it passing through the radiator correctly it will not cool. Having a new radiator helps because when they installed it they probably filled it correctly (by removing that bleeder bolt). They knew they could have just filled the old one correctly but there isn't any $$$money$$$ in that for them.
195 views
Usually answered in minutes!
×