1998 honda passport not holding water
My honda passport ain't holding and water n it
keeps overheating. I try add water every time but,
the gauge keep raising up minutes afterwards.
There are some reasons for this, may be that the thermostat needs replacing, may be air in the cooling system, or there may be a bad head, or head gasket, or a bad water pump.
It has been my experance with this Isuzu engine is when it starts doing that at least one head gasket is blown or a head is cracked, make sure the engine is cold and remove the spark plugs, then put the recommended pressure on the cooling system and watch the pressure drop, then reapply pressure one more time, wait for it too drop then crank the engine over and see how many cylinders blow out coolant, then you know how far to tear it down. It would be best to do both head gaskets cause the other one may have been weakened and could blow later down the road. Don't forget to have the heads checked for cracks and if they test good have them milled to make sure they are flat once they are off the engine. HTH
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