Question about 2004 Jaguar X-Type

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2004 Jaguar X-Type 4.2 leaks coolant constantly

I had the thermostat housing unit replaced because the mechanic said that it had some cracks in it. Two weeks went by and then the car started saying that it is low on coolant and has even slowed down as it was overheating. The warning statement came on saying that the engine temp was too high.

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  • Anonymous Oct 19, 2008

    I have the same problem even replaced the sensor and i tis still happening HELP



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Sounds like your head gaskets blew, this is common, if when it was leaking it over heated,....

Posted on Nov 26, 2008


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2004 alero heating up coolant level ok can not tell if both fans are coming on

Most common overheating problems are: 1) incorrect coolant or degraded coolant mixture (check specific gravity), 2) bad thermostat (replacement it simple and part is cheap) , 3) bad water pump (will usually see a leak at pump or hear gurgling coming from heater core area when warming up engine) 4) bad radiator (will be leaking / steaming from radiator area) 5) cooling fan not coming on after engine has reached operating temperature). First, deternine the specific gravity of your coolant. You can buy a cheap tester for this, or some auto parts stores will check it for you. If your coolant looks discolored or rusty, a flush and coolant change would be first line of action. Second, determine if your cooling fan at radiator is coming on. Start engine and allow it to idle until you have reached operating temperature, about 3-10 minutes. With hood open, you can visually and audibly notice the fan kick on after that point within the next 10 minutes. If not, could be bad temperature sensor or fan relay. To test temp. sensor, remove wiring clip on the sensor usually located on or near thermostat housing (follow large hose from top of radiator to where it connects to engine, that is the thermostat housing). Using a multimeter set to OHMS @ 200 , should get a reading of about 81 ohms resistance. If bad, replace, test warm up procedure as before. If still not kicking on, better to take to a mechanic to check relay system if you are not very mechanically savy ;) If fan kicks on primary stage and engine overheats, replace thermostat. Do this by tracing to the housing, remove bolts on housing retainer to expose thermostat,replace, reseal with gasket and RTV sealant (use sparingly) or if o-ring type, no sealant used. Spring end toward engine block, then put housing back on tighten bolts a good hand tight, do not overtighten, as you can crack the aluminum housing. Use warm up procedure as before and check to see if still overheating. If so, could be clogged radiator. If you have leaks, trace to origin, that is most likely the cause. Let us know what you find.

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Want to know how to change a thermostat on my 2004

It Depends on which engine you have, this is how it goes for both. I use a little RTV with a new ring as well.

Removal Procedure
1. Remove the necessary coolant from the radiator.
2. Remove the generator.
3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
4. Remove the thermostat housing bolts.
5. Remove the thermostat housing from the engine block.
6. Clean all of the surfaces of the thermostat housing.
7. Clean the sealing surface of the engine block.
Installation Procedure
1. Install the thermostat housing to the engine block.
2. Install the thermostat housing bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
3. Lubricate the inner diameter of the radiator hose with engine coolant.
4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
5. Install the generator.
6. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
7. Inspect all sealing surfaces for leaks after starting the engine.
1. Drain Radiator and remove the radiator outlet hose.
2. Remove the water pump inlet bolts.
3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure
IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Install the thermostat and thermostat housing to the water pump.
2. Install the thermostat housing bolts.15 N.m
3. Install the radiator outlet hose.
4. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
5. Inspect all sealing surfaces for leaks after starting the engine.

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Engine coolant low light on, radiator constantly needs water dont know where its going

re fill your cars radiator/coolant bottle then rev the engine high. you may need somones help itll make it easier . if there is a lot of steam coming out of the tail pipe and or the exhaust smells sweet like coolant then its a head gasket problem. if that doesnt find the problem park you car on a large piece of cardboard or somthing light in color. it easier to put you car on ramps or jack stands, let it idle for a long time and then look for drips and spots. if there are none then try reving you engine and recheck, from there you can locate directly above hwere its is dripping from the engine / chassis then you can trace the wet surfaces up from there check you oil as well if its to high or smells like coolant its a head gasket

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