ghettocruiser
NAXJA Forum User
- Location
- Norristown, PA
Ok... I know the overheating issue has been beaten. I spent over an hour searching through posts and I still dont know exactly what route Im going to take. Sorry if this gets long winded...please stick with me. Here is the issue.
Had to replace the head on my 94 4.0 awhile back. While apart, I replaced the rad due to a small leak. I also replaced the water pump due to a bearing issue. Brand new temp sensor as well ( the one in the head). As of late, my temp gauge will rise up almost to the red when Im stopped. Its there for a few seconds, then will drop back down to around 210. This drop DOES NOT occur due to the electric fan. Just magically drops. Yesterday I replaced the thermostat, coolant temp sensor (in the thermostat housing), and the fan clutch. Still doing it.
Some things I have noticed. Even when my gauge reads almost to the red, the elec fan does not come on, and nothing really boils over. The elec fan works under all other circumstances. When I switch on headlights, driving lights, heater blower, and step on the brakes, the gauge moves UP almost 1/8". The other weird thing is it will drop from almost in the red, to 210 in just a few seconds. I dont even see how its even physically possible for it to drop that much in that short of time. Unless my rad is making ice water.
So... am I crazy to think that the gauge is messed up? Or could this be the "new" sending unit? Im thinking about installing an aux temp gauge to see what it does. Ive got the elec fan wired to a switch already...but dotn think I should have to use it during normal operation.
Thanks for reading my novel and for any input. Goin wheeling this saturday...so this is something I want a firm grasp on by then.
Justin
Had to replace the head on my 94 4.0 awhile back. While apart, I replaced the rad due to a small leak. I also replaced the water pump due to a bearing issue. Brand new temp sensor as well ( the one in the head). As of late, my temp gauge will rise up almost to the red when Im stopped. Its there for a few seconds, then will drop back down to around 210. This drop DOES NOT occur due to the electric fan. Just magically drops. Yesterday I replaced the thermostat, coolant temp sensor (in the thermostat housing), and the fan clutch. Still doing it.
Some things I have noticed. Even when my gauge reads almost to the red, the elec fan does not come on, and nothing really boils over. The elec fan works under all other circumstances. When I switch on headlights, driving lights, heater blower, and step on the brakes, the gauge moves UP almost 1/8". The other weird thing is it will drop from almost in the red, to 210 in just a few seconds. I dont even see how its even physically possible for it to drop that much in that short of time. Unless my rad is making ice water.
So... am I crazy to think that the gauge is messed up? Or could this be the "new" sending unit? Im thinking about installing an aux temp gauge to see what it does. Ive got the elec fan wired to a switch already...but dotn think I should have to use it during normal operation.
Thanks for reading my novel and for any input. Goin wheeling this saturday...so this is something I want a firm grasp on by then.
Justin