Question about 1998 BMW 5 Series

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Bmw 5 series 1998 (R) 523i water problem temp gauge hit red water coming out of radiator upon inspection every water pipe was rock solid of pressure !!!!! (PLEASE HELP)

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You wont like me if i do? oh well nobody like me anyhow!
if the water jaket built up this much presher its likley to be a stuck thermostat or a blown head gasket,,,,to test for this,, have a "sniffer test" done they take some water out the water jaket and test it to see if it has any hydrocarbons in it,, if it has then its the head gasket poped or a cracked head!
this test takes no longer than 30 seconds to do,,,even stoping for tea!
if you fit a new thermostat first,,,, blead the air out the water jaket as well ,,,,,,,then if it boiles up,,,,its the head gasket?
see,,,you hate me now!!!! dont yer?

Posted on Aug 07, 2010

Testimonial: "your right i don't like you for that!!, however you have pin pointed it down for me i can live in hope it is the thermostat thanks for your help. "

  • Michael Thorpe
    Michael Thorpe Aug 07, 2010

    miket756

    ok ok ok,,,so you hate me! ,,,so what new in that?

    check that the cooling fan is working as well,,,,if you were is slow moving traffic and the cooling fan did not come on,,,,it cooks up

    the engine but cooking the engine could still pop the head gasket and then it cracks the head

    go on,,,,heat me some more now! do i cear?

    i got a puppy that loves me,,,so there!

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MY BMW E 46 HAVE EXCESS PRESURE IN COLING HOSES BUT TEMP IS NORMAL POSSIBLE CAUSE


Check the temperature sender unit as expanded hose indicate excessive pressure in the radiator form heat. Check flow rate through the radiator as there may be some cores blocked restricting full flow.. If the hoses expand outside the hose clips then the internal bradding has failed and eventually the hose will burst. Good hoses do not expand past the hose clip and are the same size as the bit on the housing. I would be checking engine coolant level in the radiator and not the reservoir as a temp gauge will read normal when there is no water in the system

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I have a 2002 325i BMW with 85K miles. It's had temp gauge problems for quite a while but until recently had no signs of real overheating. (I drive her only rarely though).The gauge would stay...


To verify if cooling system damage exists.
Drain the engine coolant.
Remove the intake manifold.
Remove the plastic heater core feed pipe.(located under the intake manifold).
If the coolant pipe cannot be removed after removing securing hardware, the VANOS banjo bolt must also be removed thus allowing additional clearance needed to remove the pipe.
Visually inspect the front (inside) of the coolant pipe.
If the plastic on the inside of the coolant pipe shows no signs of deterioration (smooth surface) the engine should be reassembled using new gaskets and O rings where necessary.
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Jul 07, 2011 | 2001 BMW 325

1 Answer

Got a coolant temperature problem. No leaks found. since having a new radiator by previous owner it used to lose small amount of coolant everyday, but couldn't locate problem. Now i have a new problem...


Hi Bananaman,

In the middle and late 1990"s BMW used water pumps with plastic impellars. When the vehicle would overheat or age, the impellar would come loose and create a overheating condition. I would definitely recommend removing and inspecting the water pump. Just in case the pump is ok, you can reinstall it. Make sure to replace the o-ring on the pump. Its only about $3.00.good luck.

Jun 15, 2011 | 1997 BMW 328

1 Answer

I have just replaced my water pump,radiator and radiator cap on my BMW 93 ,318 i but if i dont drive with the air con on the temp gauge goes to red and the motor cooks. The water in the radiator is boiling...


You say water, do you actually mean coolant?
Or are you putting straight water into it?
You may need to check the mixing level.
It should have a mix of 50/50.
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Lot's of coolants will come pre-diluted, which is usually always the best way to go.

I hope this helps!

Jan 11, 2011 | 1996 BMW 318

1 Answer

Driving my bmw e39 535i temp all fine accelerated up hill blew radiator top hose off and removed radiator to find bottom of rad also expanded now put another rad in but after 2 mins of running top hose is...


your cars radiator hose is building excessive pressure because the coolant / water could not circulate freely on your cooling system thats why its overheating, try removing the thermostat valve first and observe if it makes a difference, if problem is the same it could be the water pump is the culprit. try eliminating the easy things and less expensive approach first before deciding to top overhaul the engine of your car. a broken head gasket is not enough reason wont blow off your top radiator hose.

Apr 06, 2010 | 1998 BMW 5 Series

1 Answer

Engine coolant low


All autos should run a coolant mixture of 50% water, 50% anti-freeze. BMW in particular have their own formulation of anti-freeze they highly recommend you use instead of any other brand.

If your temp gauge is at mid point on a BMW it is a little high. Could be that you have too much water in the mixture and it isn't cooling properly. There is an over flow (usually plastic) which runs out of the radiator. It is here that you replentish coolant. NOT in the radiator.

At this point I'd be more concerned with where that coolant is going. I don't have to add water to my Beemer more than once a year.

Maybe you have a bad temperature sensor. Maybe a bad thermostat. At any rate, at this point I'd bite the bullet and go see the man at the BMW shop.

Better safe than sorry.

Sirwriter

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2 Answers

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