AFTER REPLACING THERMOSTAT DONT STOP OVERHEATING.CHECK THE COOLANT FAN CLUTCH.WITH HOT ENGINE THE CLUTCH FAN SHOULD HAVE RESISTANCE WHEN TURNING IT WITH HAND.IF NOT FREEWHEEL.FAULTY CLUTCH FAN.HAVE TO REPLACE CLUTCH ON FAN.BAD CLUTCH ON COOLING FAN WILL CAUSE ENGINE OVERHEAT.WHEN CLUTCH FAN FREEWHEELS AT HIGH SPEEDS NOT PULLING ENOUGH AIR THROUGH RADIATOR CORES TO COOL DOWN ANTIFREEZE AND ENGINE.
Had fan clutch checked previous and was told good.
Checked again recently and still had ( resistance talked about)
Engine does not have the normal overheat symptoms.
It will cool down while driving if I am not under a constant load.
Also whenever coolant does come from over flow, temp gauge reads
acceptable parameters. ( Performed Ohm test on thermistor also) Temp sensor good.
HAVE EGR VALVE CHECK OUT.MAKE SURE ITS NOT STUCK CLOSED AND MAKE SURE EXHAUST SYSTEM DONT HAVE NO RESTRICTION.
Since issue started I installed a new turbo system also ( old system has been another issue)
New down pipe that allows flow unlike stock
New Aurora 3000 Turbo
No cat
Delete EGR plate-(Left EGR in place still for plumbing of coolant )
New ECM ad on for new Turbo system- which required:
1) Rewire of EGR control wiring
2) sensor in coolant tube delete for stock turbo warm up
3) Mass Air flow sensor wiring runs through new ECM
So no on EGR and Exhaust is clear...
WELL BAD TRANSMISSION OR TORQUE CONVERTER WILL CAUSE ENGINE OVERHEAT.IF OVERHEATING ON UP GRADE OR HILL..YOUR RADIATOR PRESSURE CAP NEW AND COOLANT SYSTEM LEVEL IS CORRECT.CHECK WATER PUMP WEEP HOLE MAKE ITS NOT LEAKING.IF SO WATER PUMP FAULTY.
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Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
when necessary.
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
when necessary. What causes the radiator blower fan fuse to blow? It's because
of a failing radiator blower motor, If that's the case have the radiator blower
fan motor replaced.
If the fluid in radiator doesn't circulate then it means
that you have a blown head gasket or a faulty water pump. I suggest that you go
for the water pump replacement first specially if you think that it's near the
end of it's service life. Usually, water pops out the radiator when engine is
reved (a sign of faulty water pump and possible blown head gasket).
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
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