overheating problem
Rock Crawling
Joined: Dec 2009
Posts: 296
Likes: 2
From: Aurora Colorado
I would pull the spark plugs and inspect them.
any that are very clean .
Any that might have rust on the electrodes
Any that dont match the others indicate a coolant leak.
Get an IR gun and check the radiator for inlet /outlet temps.
Replace the coolant bottle cap.
Run another test for hydrocarbons in the coolant bottle vapor, NAPA sells a block tester for 50.00
any that are very clean .
Any that might have rust on the electrodes
Any that dont match the others indicate a coolant leak.
Get an IR gun and check the radiator for inlet /outlet temps.
Replace the coolant bottle cap.
Run another test for hydrocarbons in the coolant bottle vapor, NAPA sells a block tester for 50.00
Thread Starter
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Mudding
Joined: May 2007
Posts: 210
Likes: 1
From: Northern Kentucky
I would pull the spark plugs and inspect them.
any that are very clean .
Any that might have rust on the electrodes
Any that dont match the others indicate a coolant leak.
Get an IR gun and check the radiator for inlet /outlet temps.
Replace the coolant bottle cap.
Run another test for hydrocarbons in the coolant bottle vapor, NAPA sells a block tester for 50.00
any that are very clean .
Any that might have rust on the electrodes
Any that dont match the others indicate a coolant leak.
Get an IR gun and check the radiator for inlet /outlet temps.
Replace the coolant bottle cap.
Run another test for hydrocarbons in the coolant bottle vapor, NAPA sells a block tester for 50.00
Thread Starter
|
Mudding
Joined: May 2007
Posts: 210
Likes: 1
From: Northern Kentucky
cooling problem persists
Okay - to recap, my Disco overheats after driving for a couple of miles only. Here's what I've done to try to fix the problem:
pressure test at tank - held pressure for 20 minutes with no drop in pressure (19.5 lbs)
replaced A/C condenser fan and validated operation
replaced thermostat and validated operation
replaced water pump
replaced radiator
replaced top and bottom hoses
replaced serpentine belt, and yes - it is installed properly.
Viscous fan spins as seemingly intended
After talking with Disco Mike, next step is perform a chemical block test or exhaust test on the bottle to see if the head gasket is blown on the exhaust side.
I'll post again after that.
pressure test at tank - held pressure for 20 minutes with no drop in pressure (19.5 lbs)
replaced A/C condenser fan and validated operation
replaced thermostat and validated operation
replaced water pump
replaced radiator
replaced top and bottom hoses
replaced serpentine belt, and yes - it is installed properly.
Viscous fan spins as seemingly intended
After talking with Disco Mike, next step is perform a chemical block test or exhaust test on the bottle to see if the head gasket is blown on the exhaust side.
I'll post again after that.
Last edited by 2000 Disco 2 SD7; Dec 30, 2009 at 06:00 PM.
Three Wheeling
Joined: Nov 2009
Posts: 72
Likes: 1
From: Denver CO
You might want to install an in line thermostat if your block is OK. My truck was running hot with good block, new head gaskets, new water pump, thermostat, radiator and hoses. My new thermostat was not opening at idle so I installed an in line thermostat and the problem is fixed. The truck can idle all day in traffic and the auxiliary fan does not turn on.
Rock Crawling
Joined: Dec 2009
Posts: 296
Likes: 2
From: Aurora Colorado
OK so if you find no Hydrocarbon vapors in the coolant bottle and the plugs all look tan then I would look at the owners manual for the serpentine belt routing, as many times as the belt can be put on correctly it can also be mis routed and still seemingly function.
The fan should be blowing a lot of air towards the windshield, when the car is first started
The fan should be blowing a lot of air towards the windshield, when the car is first started
Thread Starter
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Mudding
Joined: May 2007
Posts: 210
Likes: 1
From: Northern Kentucky
HF? Sorry but don't know what that is.
Thread Starter
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Mudding
Joined: May 2007
Posts: 210
Likes: 1
From: Northern Kentucky
Okay - to recap, my Disco overheats after driving for a couple of miles only. Here's what I've done to try to fix the problem:
pressure test at tank - held pressure for 20 minutes with no drop in pressure (19.5 lbs)
replaced A/C condenser fan and validated operation
replaced thermostat and validated operation
replaced water pump
replaced radiator
replaced top and bottom hoses
replaced serpentine belt, and yes - it is installed properly.
Viscous fan spins - pushes air very well.
Heater works and stays hot, so doubt if an air pocket or blockage is there
After talking with Disco Mike, next step is perform a chemical block test or exhaust test on the bottle to see if the head gasket is blown on the exhaust side.
I'll post again after that.
pressure test at tank - held pressure for 20 minutes with no drop in pressure (19.5 lbs)
replaced A/C condenser fan and validated operation
replaced thermostat and validated operation
replaced water pump
replaced radiator
replaced top and bottom hoses
replaced serpentine belt, and yes - it is installed properly.
Viscous fan spins - pushes air very well.
Heater works and stays hot, so doubt if an air pocket or blockage is there
After talking with Disco Mike, next step is perform a chemical block test or exhaust test on the bottle to see if the head gasket is blown on the exhaust side.
I'll post again after that.