Question about 1996 Isuzu Trooper

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We replaced the water pump and radiator - leaking coolant

We replaced the water pump and put in a new radiator on my 1996 Trooper. It has been running good. I went in to have new tires and have them tighten up the belts. The mechanic said that my Trooper has a water pump leak. Which I have now noticed it getting hot at times. If I just replaced the water pump, where would it be leaking?

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  • Anonymous Mar 20, 2014

    All the fluid drains from the radiator when the vehicle is running. It drains from the front of the engine behind a pully. I think its due to water pump failure but am not positive.

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It could be leaking thought the gasket or radiator hose. Remove the water pump and replace the gasket, inspect the water pump first to make sure it's not leaking through the radiator hose and weep holes, if it is leaking through the weep hole then replace the water pump again since the water pump is faulty. good luck and keep me posted. 

Posted on Jun 29, 2009

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Recheck the gasket,reapply some RTV.make sure your thermostat is in good condition.

Posted on Jun 29, 2009

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THE WATERPUMP GASKET TO THE BLOCK

Posted on Jun 29, 2009

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Your radiator efficiency has been reduced by (what is called) blossoming. Blossoming is electrolytic growth of crystals inside radiator duct passages. This typically occurs in the older Troops as gradual overheating probs cause the vehicle to run low on coolant, then water is being used to top off system repeatedly, acid levels in cooling system rise as the coolant protectants degrade and the inside of the radiator ducts 'blossom' with small crystalline growths that reduce the radiators flow and ability to cool the engine. Flushing and blowing out the radiator are temporary fixes. Replacing the radiator is the permanent fix. You did the right thing by replacing the water pump, tstat and radiator cap. An old, original water pump usually fails soon after the radiator is replaced. New Trooper radiators are fairly cheap, $85+. The replacement can be done by any backyard mechanic or DIYer in under and hour. You know the typical warnings about the toxicity of antifreeze and the deadly affects on pets who drink improperly disposed coolant. Good luck to you. It's an easy remove and replace. Your Trooper will thank you with many cool running miles. -Geoff

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Water pump


buy a new water pump, remove the radiator, remove the hose from the pump, remove the bolts that holds the pump, remove the old pump.

put the new gasket in the pump, dont forget to put a little bit of grease just to hold the gasket inplace. put the new pump, use the old bolts from where they are taken ( sometimes they are not of equal length ). if you have a torque wrench then use it to tighten the bolts with equal amounts of torque. put the hose back, put the radiator back, put water in the radiator, run the engine and look for some leaks at the new pump.

i hope i did it..

tnx, drcool

Jul 28, 2008 | 1998 Chevrolet Cavalier

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