Question about 1990 BMW 525i

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

What the causes of 1990 BMW 525i overheats after replaceing water pump,fan clucth heat gasket andn radiator radiator what are other causes

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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.

1990 BMW  525i 2.5L engine overheats after rplacei - 1990-bmw-525i-2-5l-engine-overheats-fibacwft50qlopemjcsdtpdf-4-0.jpg

Posted on Oct 22, 2015

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6ya6ya
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Posted on Jan 02, 2017

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eitan
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SOURCE: diagram for serpentine belt for 2002 BMW 525i

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An image of a serpentine belt, hope this will help you,
Eitan.

Posted on Jun 10, 2008

  • 1 Answer

SOURCE: overheating

overheating bmw ...no sign of water in oil..no water from exhaust .. over heats in minutes ..ok when moving ?? please help ..

Posted on Jul 06, 2009

fixyathing
  • 341 Answers

SOURCE: when running the ac it overheats

flushing the radiator might not be enough to remove the water scales inside the small cavities...have it opened and cleaned thoroughly. In the location where I live they remove the top and the bottom part of the radiator and put a flat wire in and out into each of the flat tubes to dislodge the accumulated scales and dirt out. hope this helps

Posted on Aug 18, 2009

  • 32 Answers

SOURCE: where can I get a diagram of the 1990 BMW 525i

bimmerfest.com and do a search in the 5 series section.

Posted on Oct 13, 2009

  • 41 Answers

SOURCE: 1988 BMW 735I RUNING HOT REPLACE THE RADIATOR,

Headgasket must be checked. and check that you have enough radiator fluid. Also check for warped/cracked cylinder head.

Posted on Nov 07, 2009

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I have a 2001 525i bmw and have replaced thermostat and hoses but car still overheats when driving and coolant doesn't seem to pass through to engine. Could it be water pump? SUGGESTIONS PLEASE?


possibly water pump, air block. maybe the radiator is blocked. maybe it is time for a cooling system service. If problems persist

Does the fan cut in when it should?

May 30, 2015 | BMW 525i Cars & Trucks

2 Answers

I'm replacing a water pump on my 1990 BMW 525i and I don't no how to remove that thing where the spark plugs go and the rotor 2nd I'm also need to remove the timing belt cover can I get the 3rd bolt out...


STOP what you are doing before you damage something!! Whatever you are trying to remove is not the water pump. Neither the sparkplugs nor the "timing belt" cover needs to come off. Remove the fan belt. Remove the fan (the nut is LH thread- means it turns left to tighten and right to loosen). You will need a large wrench (32mm) availible at sears.The water pump is directly behind the fan and is held in by 4 10mm bolts.

Aug 17, 2014 | 1990 BMW 525i

1 Answer

My 1990 BMW 525i is over heating


Try replacing the thermostat. It is supposed to open when the water temp reaches a certain point usually around 180 degrees. It might be stuck in the closed position.

Sep 28, 2012 | 1990 BMW 525i

1 Answer

Mazda running hot


Is there a restriction in the exhaust system ?
How about a restriction in the air flow thru the radiator ?
How long can you drive it before it overheats, and does it boil over ?

Aug 05, 2012 | 1990 Mazda B-Series

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Hi i have BMW 525i 2004 from time to time when


It is very important that the engine not overheat! The head can crack and this would be very bad.
I think your car is too new to need a new radiator.
Make sure the coolant level is correct.
Check the thermostat housing for leaks.
When the engine is hot, check if the fan clutch is locked up and actually driving the fan. Turn the engine off and grab the fan and try to turn it. It should turn stiffly. If it spins freely the fan clutch is dead.
It is possible that the water pump impeller has failed, especially if it is a plastic one.

Jan 21, 2010 | 2004 BMW 5 Series

3 Answers

BMW 525i Overheating, already changes thermostat, water pump < what do I check or do next...car has 110K miles


Are you sure the Fan is turning to cool the Engine? If it is not coming on to cool Engine Check the Rad. cooling fan relay.

Jan 04, 2010 | 1995 BMW 5 Series

2 Answers

Overheating


you might have a blown head casket try due a pressure test on each cylinder and sometimes you can take a spark plug out 1 by 1 and just tap the ket so it cranks and see if water comes out of the cylinder

May 20, 2009 | 1995 BMW 5 Series

1 Answer

1990 bmw 525i overheating ..


No such pump! Make sure you have anti-freeze in the radiator. It circulates better than just water, because water boils and turns to steam (goes UP) proper antifreeze helps it not have pockets of steam/air.

Nov 29, 2008 | 1990 Isuzu Trooper

1 Answer

1990 ford ranger is overheating


If the cooling system has no bleeder valves to vent air, you may have to temporarily loosen a heater hose to get all the air out of the system...Also check to see if there is water in the oil...If there is water in the oil then it could have a head gasket problem....Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.

Oct 20, 2008 | 1998 Oldsmobile Bravada

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