My stock Fj60 runs hot when in low gears/slow speeds with the heaters off. It cools down when I speed up or when I open the heaters up and am driving.
I wanted to simply redo the coolant system with a new thermostat, water pump and cleaned-radiator. Before I dive into it, I of course have some questions.
1) What is the best way to flush the system such that once done everything old is removed from the radiator, block, front and rear heaters ? I understand to unplug the rad petcock and block plug, but there is still gunk in the front and rear heaters.
Can I unplug both the petcock and block plug with the heaters open and put hose water through it while running the engine or will I kill the engine with heat as the block plug will still be open ?
Should I instead unplug the two and drain, close the plugs back up, fill with water and run the engine until the thermostat opens and then turn off, unplug, drain, plug and repeat until all I get is clear water ?
2) Should I flush the system before AND after I install everything new or just afterwards. Was thinking both before and after because I don't want to contaminate any of the new or cleaned stuff with old coolant in the flushing processes afterwards.
3) For these old FJ60's, is the typical Prestone green w/ distilled water a "high quality" antifreeze per the FSM?
4) Has anyone ever rebuilt the water pump ? I am replacing mine but wanted to rebuild the old one in case of an emergency. I can get the OEM rebuild kit for less than $30 but I am not sure if taking out and pressing in the bearings is doable without the SST from the "water pump rebuild tool kit" mentioned in the FSM.
5) Has anyone ever had their rad cleaned with a "thermosonic" cleaner ? One local rad shop suggested that before rodding. Is it effective enough ?
6) Where in any Toyota manual does it describe how to actually take off these parts ? There is a heater section in the FJ60 "body and chassis manual" and a bit about the thermostat, radiator and water pump in the 2f manual, but neither shows removal of any of the said parts. just how to take them apart or diagnose replacement once removed.
7) Are the hoses going into the firewall for the heater in the correct position ? I don't think they are. How much of an effect on my coolant system did this have if in fact it is incorrect .
I wanted to simply redo the coolant system with a new thermostat, water pump and cleaned-radiator. Before I dive into it, I of course have some questions.
1) What is the best way to flush the system such that once done everything old is removed from the radiator, block, front and rear heaters ? I understand to unplug the rad petcock and block plug, but there is still gunk in the front and rear heaters.
Can I unplug both the petcock and block plug with the heaters open and put hose water through it while running the engine or will I kill the engine with heat as the block plug will still be open ?
Should I instead unplug the two and drain, close the plugs back up, fill with water and run the engine until the thermostat opens and then turn off, unplug, drain, plug and repeat until all I get is clear water ?
2) Should I flush the system before AND after I install everything new or just afterwards. Was thinking both before and after because I don't want to contaminate any of the new or cleaned stuff with old coolant in the flushing processes afterwards.
3) For these old FJ60's, is the typical Prestone green w/ distilled water a "high quality" antifreeze per the FSM?
4) Has anyone ever rebuilt the water pump ? I am replacing mine but wanted to rebuild the old one in case of an emergency. I can get the OEM rebuild kit for less than $30 but I am not sure if taking out and pressing in the bearings is doable without the SST from the "water pump rebuild tool kit" mentioned in the FSM.
5) Has anyone ever had their rad cleaned with a "thermosonic" cleaner ? One local rad shop suggested that before rodding. Is it effective enough ?
6) Where in any Toyota manual does it describe how to actually take off these parts ? There is a heater section in the FJ60 "body and chassis manual" and a bit about the thermostat, radiator and water pump in the 2f manual, but neither shows removal of any of the said parts. just how to take them apart or diagnose replacement once removed.
7) Are the hoses going into the firewall for the heater in the correct position ? I don't think they are. How much of an effect on my coolant system did this have if in fact it is incorrect .