Question about 1999 Land Rover Discovery

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New fan clutch t-stat still overheats

New fan clutch and t-stat still overheats not mixing fluids has no heat . Could this be blon head gaskets or floating cylinder sleeves?

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Yes, I am sorry to say this could be a blown head gasket. It could also be a bad water pump. Lets hope that it is the pump. You can get a pump replace for under $200.00 as opposed to the head gasket which runs over a thousand. It really sounds like water pump problem because you are not getting heated water to you heater core, where This would also cause the non mixing of fluids. Take the radiator cap off and see if you get bubbles rising to the to cover. Also if you rev the engine up and water comes shooting out the radiator cover hole the you definetely have a head gasket problem. Be very careful not to burn yourself. I bet anything it is just a pump. Gaskets ususally only go bad if you drive the car while overheating. Lets get this solved for you. Send me your qustions and we will get you taken care of. Please leave me good feedback, it means a lot to me....

Posted on Jul 20, 2009

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Timing could be out!!! or the radiator core is blocked
cheers Rob.

Posted on Jul 20, 2009

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Try water pump first, sounds like no water is circulating like a thermostat stuck closed or water pump not pumping. Also I would do a full system flush to make sure you have no blockage in the heater core or radiator.

Posted on Jul 20, 2009

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1 Answer

2000 lincoln ls overheats. Changed t stat and waterpump. Boiling in driverside reservoir. Passenger reservoir look like fluids mixed. Car have heat


With engine cold remove radiator cap. Start engine and look for bubbles in cooling fluid. Bubbles mean blown head gasket.

Mar 03, 2016 | Lincoln Cars & Trucks

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We changed thermostat sensor and thermostat, still over heating. What could it be?


overheating has many symptoms, not just green on the ground
do tell?


temp gauge lies its buns off... use a real tool called a thermometer to see real temps. we use a IR pyro gun to see it and not GET burnt.

gauges is telling truth, so......................


a bad rad cap, or bad thermostat are common fails.
test one: (dead cold engine) never hot.
radiator tank filler cap off , you look down there, is the level really low?
(forget the silly side expansion tank for now)
if found low , then fill it and burp it. no air allowed there
running 50% antifreeze now? no?, that its WRONG.
the tool is $2, test it. (Prestone sells it)
the coolant is all rusty color, (ill not comment ) try service.

  1. Green on the ground,? for passengers feet.
  2. Water exploding from overfill side tank? ( oil in RAD or Milky engine oil) (same milk in transmission pan?)Exploding gases, on cold start is bad head gasket or warped head or cracked head/block, or just simple overheating, The Rad leak down test and the exhaust test (green/blue ) tests solve this riddle easy.
  3. Steam rising from hood or Radcap, or hose to Cap and recovery tank. Over heating or leaks.
  4. Dash gauge pegged. (or WILD GAUGE swings "air pockets below thermostat") or gauge bad. sender bad.
  5. Motor pinging and loss of power. (do not allow pinging, it will wreck the engine)
  6. Pistons landing on ground? (just joking....)
  7. A/C dies?, does it?, due to A/C engine overheat switch ,tripping off. a 235 ?F (spec) see FSM. A/C means Air conditioner clutch dead.
  8. Does the engine over heat , if left idling a long time (30min-1hr). or only at stop signs or red lights? (clutch fan not activating , check it, this way.)
  9. Does it only over heat while moving ? ( a bad pump, or Rad)
  10. Overheats, only on hills? (bad RAD)
  11. Only overheats pulling heavy loads ? (inside, full of bricks, or pulling a 1000 trailer ? ONLY?
  12. Never overheats moving fast on flat ground. (so the RAD fan is dead, no mater if stock or hacked in electric fan, it's DEAD)
  13. Do you have carbon or oil floating around in the Rad, filler CAP neck top tank ? yes?, that is bad head gasket or worse cracked block/head. Do the Exhaust test.
  14. Overheats under all conditions, Catastrophic overheat. ( can be bad pump (rotor gone) or RAD or system is packed up)
  15. Seems to overheat , even at first start , in 1min or less I have gases shooting into the overfill tank, that is a bad head gasket (mostly a warped head, at least)
  16. Antifreeze (and water) in the pans, Engine or Transmission.
  17. The RAD fan is DEAD ( just because a mechanical RAD fan coasts, don't mean it WORKS RIGHT.) See the clutch tests below. if electric fan , there is a test in the FSM covers this 100% the fan must come on over heated,.
  18. my electric fan , starts to run idling engine long time at 225F. It kicks on, some cars have 2 fan and staged, come on trip points.
  19. RTM read the manual the FSM>
  20. there is more im sure, cant think of them all now.

That pyro gun allows me to test any RAD easy , ask.
ok , i check all rad tube top and bottom and bingo find any tube clogged fast. if all are equally clogged.(partial) i cant find that.
that is caused by zero service, so...and there are signs for that too.


Jul 02, 2014 | Cars & Trucks

1 Answer

I bought a 2000 lincoln ls about a month ago and after we bought it, it started having an over heating problem. Since then, we put new fan, new t-stat, new coils and valves, new radiator cap, new belts,...


I believe you have a head gasket or cylinder head problem (cracked head or blown head gasket).. If it is the gasket, the intake and cylinder head must be removed and a new gasket installed.. If it is the head itself, in addition to what have just said, you will have to have the head repaired or get a reconditoned or new one. This is a major repair.

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sounds like one of 2 things, the thermostat or the engine has a leaking head gasket, replace the T-stat 1st, if the problem persists have the engine tested for blown head gasket(s) if the radiator was the problem u would have circulation and engine would overheat very slowly or just hotter than normal.

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if your mechanic seen no leaks from hoses or thermostat housing its sounds that either your fan clutch or your thermostat is bad. if its heats will driving streets and not highway its your fan clutch and needs to be replaced. if it overheats in streets and highway its your thermostat and needs to be replaced,you will need a thermostat and gasket with some silicone. Drain, follow the radiator hose to the housing and take 3 bolt off, clean housing well,CAREFULLY install the t-stat exactly the way is was taken out (pic), gasket,sillicone, bolt. ecc3d0c.jpg   its an easy job. Good luck!

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94 jeep wrangler overheating


Have the cooling system pressure tested. If it holds pressure, that's a good thing. If it doesn't hold pressure, you may have a leaking head gasket. What may be happening is the crack in the head gasket could be blowing hot air into the cooling system causing it to overheat.

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cloged radiator or head gasket blown
clogged radiator let cool then run car without radiator cap when warms up the water should be running fast in direction without bubbles
if slow the there is a clog in radiator

the other things of over heating tranny low on fluid
oil fluid low
drive line fluid or grease low
binding brakes
warped fan blades or improper fan clutch or defective
hope this helped its off the top of my head since im not there

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