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Jaguarxj8 1999 3.2.water overheats after about half a mile.bubbling out of the expansion tank.any ideas please.

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Posted on Jan 06, 2011

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Stuck thermostat. Bad head gasket?

Posted on Jan 06, 2011


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1 Answer

1990 BMW 525i 2.5L engine overheats after rplaceing water pump, stermostat,fan clucth,radiator

There's trapped air in the cooling system.
  • You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
  • With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
  • Just keep adding water until no more air bubbles come out then just put the screw back in place.
  • Then fill the expansion tank to it's normal level/line.



May 07, 2014 | 1990 BMW 525i

1 Answer

2000 ford taurus...In the last 2 years have had heater core, water pump, thermostats (2) resovoir, hoses and system flushed. Now again after 70 miles or so of driving the car overheats and anitfreeze...

take it to someone else, have them pressure test the system, mine did that and i was into 1200 bucks for new heads, two years ater since i drove it like you have been i developed a misfire , the coolant leaks into the system and is like sand paper on cylinders bearings, clue was the expansion tank bubbling and vibrating after ya turn off the car, good luck i hate this car

May 12, 2011 | 2000 Ford Taurus

1 Answer

I have got the head skimmed and have put in a new head gasket, timing belt and water pump. engine is running ok when its cold but when it gets hot it starts bubbling water out of the expansion tank. Have u...

Did you replace the thermostat? Does it overheat? You could have just over filled it. Just run it a couple of days and watch the heat gauge. If it keeps bubbling out of the expansion tank I would recheck the torque on the head bolts. You will have to loosen them up and retorque them in sequence, from the center back and forth out to the sides.

Nov 18, 2010 | Audi A4 Cars & Trucks

1 Answer


replace your coolant reservior cap; the rubber ring has become brittle and "steams" the coolant out as you drive

Apr 21, 2009 | 1997 BMW 318

1 Answer

Water shoots out of expansion tank and overheats, electric fan no

If your oil is milky it is a blown head gasket or worse a warped head.

Apr 15, 2009 | 1999 Volkswagen Golf

1 Answer

Freelander loosing/using a little water & running slightly hotter

Might be worth changing water expansion tank cap these can lose water under pressure

Jun 06, 2017 | 2002 Land Rover Freelander

1 Answer

Leaks and overheats really fast

hi it sounds like your headgaskets blown you need to take your rad cap off fill with water start the engine see if you see any bubbles in the water or if the water blows straight out its a good indication the headgaskets gone the thing on the right hand side is the expansion tank overflow if this blows water out even when cold the headgaskets gone if you see no bubbles in the water change your thermostat the two fans on the rad have nothing to do with your a/c if that doesn,t work may need pressurising yates210456

Oct 01, 2008 | 1992 Honda Accord

2 Answers


that's the problem
yes, you have to take the coolant filling cap off " expansion tank cap "
turn your car on for at least an hour
the bmw line has a very bad problem wich is " bubbles " inside your water system
you have to have your car inclined and running without the cap so he can bleed all the bubbles out.
sorry you spent all that money but after you replaced the radiator all you had to do was that, to get rid of bubbles.

so, do this. park your car on an incline position, engine up.
remove the cap. let it run for at least an hour.
refill as needed " coolant "
do that the following morning and for last refill the collant as needed.
problem should desapear.
hope this helps

Jun 08, 2008 | 1999 BMW 318 ti

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