1999 Isuzu Rodeo Q&A
1999 Isuzu Rodeo Question: Cooling system
My son's Rodeo occasionally ran hot so he replaced the thermostat. Now it runs hot every time he starts it and drives a mile or two. Will a pressure test show what the problem is? Could it be the water pump? - Visitor
A pressure test will help you find a leak, that's it. If the engine is overheating there can be several reasons. It may have an air bubble in the cooling system from when your son replaced the thermostat, the radiator fan may be broken, the water pump could be bad or several other things. Best to not drive this if it is overheating, you will damage the engine. Have it towed to a shop and get it looked at by a professional, don't let him learn the hard way when it comes to a potentially expensive repair like this. - Bret Bodas
I have a Rodeo with the same problem. Your water pump is probably not the problem unless it is leaking. Because and is likely to be working fine since it is powered by the timing belt. (Timing Belt is fine since the car is Starting). I would suggest running the car till it looks like it is overheating then loosen the radiator cap (1/2 turn to the left) so that it is still on but relieves dthe pressure. Then check your temp gage and see if it continues to overheat. If it stops overheating then it is the radiator cap. But I warn you it is very difficult to find the right cap to releave the proper amount of pressure I refuse to pay isuzu $30 for a Cap - Visitor
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