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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Re: We replaced the water pump and radiator - leaking...
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.
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Looks like you have a leaking head gasket or cracked head. You can buy a head gasket leak detector kit that will let you know if there is CO2 gas escaping through the radiator. I think that it is this gas leak that makes it look like your radiator is boiling.
CHECK AROUND WATER PUMP AREA.AND THERMOSTAT HOUSING FOR LEAKS.THE MECHANIC WHO PUT THE WATER PUMP ON MAY FORGOT TO PUT SEALANT ON BOTH SIDES OF THE WATER PUMP GASKET CAUSING LEAKS.LOOK AROUND THERMOSTAT HOUSING FOR LEAKING.IF THERMOSTAT SEAL WAS DAMAGE DURING INSTALLATION IT WILL CAUSE LEAKING.IF ALL LOOKS GOOD CHECK FOR COOLANT LEAKS AROUND RADIATOR .CHECK RADIATOR TOP AND BOTTOM HOSES FOR LEAKS AND CHECK HEATER PIPES AND HEATER CORES HOSES FOR LEAKS.IF ALL HOSES GOOD.CHECK FOR LEAKING CORE PLUGS.
Sometimes the pipe that runs under the intake will leak. Can you smell antifreeze burning while you are driving? Another way to tell, is to let the vehicle run with the cap off. IF you get alot of bubbles out of the radiator, you have a cracked head, or a bad head gasket which is also a fairly common problem. It will push the antifreeze out of the radiator, and cause it to overheat.
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
You can have it repaired at a radiator shop, or replaced with a new one. Are you sure it's the radiator that's leaking, sometimes it's the water pump or a hose that drips down onto the radiator. It can be difficult to locate due to air circulation of the fan and driving which spreads the leaking fluid around. I assume u top off the coolant often, since u say there are no issues w/ it overheating or running hot. If this is the case, the leak will eventually get worse, and adding coolant constantly gets expensive. Good luck, let me know what u decide to do, or if u have any other questions. Curt
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.