Question about Land Rover Range Rover

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97 Range Rover all of sudden started over heatting, boiling over from the reservoir and coolant area. Just put in new brakes? What could the overheatting be from? New water pump and new thermostats. How do i bleed the systems?

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TO BLEED COOLANT SYSTEM.FILL RADIATOR UP UNTIL COOLANT LEVEL STOP DROPPING IN RADIATOR.PUT RADIATOR CAP ON.CRANK CAR UP FOR A FEW MINUTES.LET IT IDLE TO GET WARM OR OPERATING TEMP SO THE THERMOSTAT OPEN UP. WATCH TEMP GAUGE.WHEN ENGINE START TO WARM UP.TURN OFF ENGINE.WAIT A WHILE.SO YOU WONT GET SCALDED.GET A LARGE RAG TO PLACE OVER RADIATOR CAP.WHEN ENGINE COOL DOWN ENOUGH .TAKE RADIATOR CAP OFF ADD MORE COOLANT TO RADIATOR.PUT CAP BACK ON.CRANK UP THE ENGINE.LET IT IDLE FEEL TOP RADIATOR HOSE.WHEN IT STARTING TO GET WARM THERMOSTAT OPENING UP.STOP ENGINE AGAIN.LET IT COOL DOWN SO YOU WONT GET SCALDED.OPEN THE CAP A LITTLE BIT AT TIME.WHEN ENGINE COOL DOWN ENOUGH OPEN RADIATOR CAP ADD MORE COOLANT.DO THIS PROCEDURE UNTIL YOUR COOLANT LEVEL IN RADIATOR STOP DROPPING.THEN YOU WILL HAVE RIGHT AMOUNT COOLANT IN SYSTEM AND ALL AIR IS OUT.BECAREFUL WHEN TAKING RADIATOR CAP OFF.LET ENGINE COOL DOWN.WAIT 30 MINUTES .USE A LARGE RAG.OPEN THE CAP A LITTLE BIT AT A TIME LET OFF PRESSURE.THAT WAY YOU WONT GET SCALDED.DONT TAKE CAP OFF REAL FAST.LET PRESSURE BLEED OFF UNTIL YOU DONT HEAR A HISSING NOISE.LET ME KNOW HOW IT GOES.

Posted on Sep 26, 2009

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Yes, could have air traped in the system, but from my experience this only gives a false indicator of being hot. When I see a car overheat I think thermosat,fan, radiator cap, or headgasket/craked head in that order. You have already changed the thermostat, so the nest thing to check would be the fan clutch. You can check this by spinning the fan when both hot and cold. When hot it should get very hard to spin- I like less than one revolution when given a good spin.Also a good indicator of a bad fan would be if it gets hotter in town than on the highway. On th e highway you get ram air that helps to cool it down. Radiator caps need the gaskets inspected for crackes and hardness. If crackes are present or to hard they won't seal causing the radiator to overflow. They should also be preasure tested by a local shop or parts store. If the preasure is to low this will also alow the car to heat up quicker and also allow the radiator to empty at a lower temp. The best way to test for a cobustion chamber leak is at a shop. Many shops can test for this right at the radiator with a special dye that will change color in the presence of combustion chamber gases in the collant system. You will notice that I never metioned water pump even though you already change it. Water pumps either pump or they leak, very rarley will they not pump water causing an overheating problem. The only way they will cause an engine to overheat is if they loose the ability to pump water through the loss of the impeller or a broken shaft- or on the very rare occasion an impeller that has run so long that it is worn out.

Posted on Sep 26, 2009

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