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Discussion Starter · #1 ·
Any help please my 2003 rodeo 3.5 v6 6ve1 is overheating have replaced thermostat and radiator pressure tested the system no leaks what so ever no water in oil top radiator hose gets very hot but bottom hose stays cold got hot air coming from heater in cab air con works well radiator holds water well when idling takes a long time to show signs of overheating and when I take it for a short drive still takes a while to show signs of overheating any help would be much appreciated cheers first time user
 

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What indication do you have that makes you think the engine is overheating, did you check the engine coolant temperature with an OBD II scan tool or use an infared temperature gun to see if coolant is flowing through the radiator.
 

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What indication do you have that makes you think the engine is overheating, did you check the engine coolant temperature with an OBD II scan tool or use an infared temperature gun to see if coolant is flowing through the radiator.
Thanks for the reply no haven't done those checks the indicator I get is the gage in the cab plus when I go to take the rad cap of its spitting and very hot I can't understand why the top radiator hose is very hot and the bottom one very cold cheers Buster
 

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Hot water rises.
The top hose is will always be hotter then the bottom. As the engine is running at normal temp and the t-stat opens grab the hose, you should feel a rush of coolant flowing inside. if not you have a stuck T-stat, restriction in the system or faulty water pump.
Next.... After the engine is at normal temperature turn off the engine and place your hand on the radiator. You are checking for cold spots.and as your hand moves down the radiator the temp should get progressively cooler. If you find a cold spot you have a clogged radiator at that exact location. This is not everything you need to troubleshoot but a good start. let me know your findings and I will guide you to the next steps.
 

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Discussion Starter · #5 ·
Hot water rises.
The top hose is will always be hotter then the bottom. As the engine is running at normal temp and the t-stat opens grab the hose, you should feel a rush of coolant flowing inside. if not you have a stuck T-stat, restriction in the system or faulty water pump.
Next.... After the engine is at normal temperature turn off the engine and place your hand on the radiator. You are checking for cold spots.and as your hand moves down the radiator the temp should get progressively cooler. If you find a cold spot you have a clogged radiator at that exact location. This is not everything you need to troubleshoot but a good start. let me know your findings and I will guide you to the next steps.
Thanks Shawn will try these and get back to you mate cheers
 

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I just replaced my radiator and fan clutch. Both were supposedly good . The amounts of scale , clag and debris were unbelievable. The radiator could barely keep up, Not leaking is only part of the radiator function
 
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