Question about 1999 Land Rover Discovery

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I have bought a 99 land rover discovery and it has started overheating, new water pump, radiator good, thermostat good, did leakage test with air it did not leak. fans do not always come on? it has blown the release valve on radiator and then cracked the plastic holding tank for radiator. cant figure out where the pressure is coming from. why it only does it on occasion. once while on interstate, the next time just sitting idling. Optional Information: Year: 1999 Make: LandRover Make (other): discovery Engine: v8 automatic Already Tried: New waterpump, clean radiator, thermostat, leakage test air. (no Leakage) the temp will go up with air conditioner or just turn on the assecc.

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Engine overheating? Try this procedure:

  • The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on Apr 25, 2015

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Can your head gasket be blown? Only the combustion can have such high pressure.

Posted on May 10, 2010

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Posted on Jan 02, 2017

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SOURCE: I have bought a 99 land rover discovery and it is overheating

From practical experiences of heavy trucks, this problem is created by poor coolant flow thro' the Radiator Core. Flush cleaning the Rad. or decontaminating the exterior air flowways will not cure the problem. My recommendation is a Recore or after market replacement.
Regards.DT

Posted on May 10, 2010

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1 Answer

My land rover is always threatening to overheat had pressure test done they did the test for blown head gasket it blows cold air I changed thermostat there are no leaks anywhere please help 2002 land rover...


What blows cold air? The heater? Sounds like a radiator problem. I'd have someone flush the cooling system if it has not already been done. Could also be a bad or going bad Coolant pump, unless it has been replaced. It might be smart to do both at the same time. If the coolant pump is bad, it could explain no circulation of hot coolant through your heater coil.

Mar 04, 2015 | Land Rover Cars & Trucks

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Heater works fine while driving, but when at a stop or engine idle, the heater starts blowing cold air. WHY?


possibly water pump not circulating water properly, have you checked the coolant level? Also thermostat could be jammed open.

Jan 02, 2013 | 2004 Land Rover Discovery

2 Answers

Overheating


check fluid level in radiator are you leaking fluid on ground does cooling fans come on if they dont check fuse for fans if fuse is good inspect wires going to fans are fan motors bad is water flowing thru engine anfter thermostat opens if notcould be bad water pump is there water on your oil dip stick if so blown head gasket dont keep driveing hot

Nov 29, 2010 | 1995 Land Rover Discovery

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I have a 1999 land rover discovory 2 and its leacking coolent i checked the oil theres no collent there so i think its the water pump car runs goode still temp is im the middle plese help


it could be the water pump...
check if the radiator if its leaking...
and it could be the thermostat...
check all of them...these are the main parts that could cause overheating or a leakage of coolant...or it could just be a loose or bad hose...
Good Luck!

Oct 12, 2010 | 1999 Land Rover Discovery

1 Answer

I have bought a 99 land rover discovery and it is overheating


From practical experiences of heavy trucks, this problem is created by poor coolant flow thro' the Radiator Core. Flush cleaning the Rad. or decontaminating the exterior air flowways will not cure the problem. My recommendation is a Recore or after market replacement.
Regards.DT

May 10, 2010 | 1999 Land Rover Discovery

1 Answer

Losing antifreeze, but I see no leakage on the


If you are loosing radiator water/antifreeze and you see 'white' smoke out of your exhaust then it is likely that you are seeing steam: this usually indicates that you have a blown cylinder head gasket or have a cracked ylinder head: both situation will cause overheating of your engine. You can also check this situation by waiting until the engine is COLD, opening the radiator cap, refill with clean radiator fluid/water, restart the engine and see if the water as seen in the radiator is violently bubbling. Another condition before even starting the car again is if you see oil/white-brown staining in the radiator fluid caused by cracked cylinder head or gaskets letting engine oil in the radiator circuit. In any case, it is a critical sitation and you should get it checked and fixed immediately.
Hope it helps and please let me know if I have assessed the correct situation.

Jan 23, 2010 | 1995 Land Rover Range Rover

2 Answers

99 land rover disco overheating!


Start with the cheapest part and that would be the thermostat. They are easy to replace and that appears to be the issue. They do wear out or stick.

Mar 17, 2017 | 1999 Land Rover Discovery

1 Answer

Truck running hot


your radiator could be pluged up internally especially if you havent bought this new. alot of people will dump in a radiator leak stoper if the radiator has a small leak and that is not the right thing to do because the stuff can plug up a lot more than the hole.if you take the radiator out and know of a radiator shop they will flow test your radiator and let you know if it is pluged up internally or not i hope this helps you and please rate my solution.
thank you

Apr 21, 2009 | 1999 Land Rover Discovery

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