Reasons why your 4x4 is Overheating

[chollyfunk]

Well I've just had some serious overheating since yesterday. After discovering my radiator was EMPTY (I've been away for a couple of weeks) it looks like I've got a problem with my water pump. There's coolant leaking from it which sounds like the seal to me, but I also had a whining sound for a bit which last time I had one of those turned out to be worn bearings on a drive shaft - so I'm thinking maybe both these things have happened and I need to get a new water pump?

As you can tell, I know absolutely nothing about engines But it seems like a job I might be able to take on myself... amirite?

[cairnsGU]

easiest way to check a thermostat I find is to look for the temperature rating on it and then stick it in a saucepan with a thermometer. While the water is warming up keep an eye on the thermometer and the thermostat and see if it opens at the right temperature. If it doesn't, replace it.

Thats if you dont own a zd30 lol

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[bentron]

My 2003 ZD30 was overheating going up big hills on the highway but never any other time. Found out was a partially blocked radiator got a new one delivered for $350 and has not been a problem since.