The water pump on this engine is about center-left as you look at the front of it. It is under the timing cover and requires removal of the cover and timing belt. Timing can be tricky to get right on these engines so use caution. Isuzu's are good for head gaskets also. While the engine is running cold, have the radiator cap off, watch for water movement indicating the water pump working. If the coolant is being pushed out of the radiator, chances are you have a bad head gasket.
Wednesday, April 5th, 2006 AT 8:24 AM