Question about 1996 BMW 318

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RADIATOR COOLANT REPLACEMENT BMW E36 1992

Hi, I have just replaced the water pump and would like to know what is the procedure to replace the radiator coolant, thanks

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  • Anonymous Dec 14, 2008

    where is the drain on the rad for a 325 bmw

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Seeing as you just replaced the water pump, there should be little fluid remaining.

Remove the drain plug from the bottom driver's side of the radiator. Let it drain into a large pan. Once draining is complete, remove the bottom radiator hose from the passenger side of the radiator just to get everything out of the engine if the engine block drain plug didn't remove all of the fluid. Replace the plugs and lines if removed.

Fill the radiator reservoir and start the engine with heat controls on high. open the bleed screw beside the filler cap just enough to let air out. Keep refilling reservoir as the engine sucks it into the radiator. Only fill it to the cold line. Once it stops moving below the Cold/KALT line, replace the cap and close bleed screw.

Posted on Dec 04, 2008

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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.
50% water and 50% antifreeze/coolant.
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

I have a 98 bmw 740il that keeps overheating. I have replaced the water pump about 6 months ago. I have removed the over flow tank and check for cracks. It is in good condition. I also have no heat. The...


I am not aying that this is what I think it is but I found this on your year BMW

Some BMW, Volkswagen and Audi cars have a common problem that the water pump impeller becomes dislodged from the input shaft of the water pump leaving the water pump looking ok from the outside, but failed on the inside. If your car experiences this problem it will over heat rapidly much like a thermostat failure. For exact specific repair procedures for this repair visit our online repair manual page.




Failed BMW, VW, Audi Water Pump Troubleshooting Procedure
  • Check Water Pump Operation - To troubleshoot this problem first drain about a half a gallon out of the cooling system, next remove the thermostat from the engine. With the thermostat out start the engine (stand back) coolant should be forced out of the thermostat port, if not the impeller has dislodged itself from the water pump input shaft and needs to be replaced. To replace the water pump finish draining the remainder of engine coolant, remove the serpentine belt and coolant hoses. Next remove the water pump mounting bolts and remove the water pump. Clean gasket surfaces and reinstall new water pump and reassemble. Refill with coolant and recheck system, top off engine coolant after it has re-cooled.

Nov 23, 2010 | 1998 BMW 7 Series

2 Answers

1995 BMW 525I over heating issue. I repaired head


Hi, Sounds like you have tried about everything. Ok the aux. coolant switch is for the electric pump for the heater core will not cause an over heating condition just a longer warm up of the heater core. Has the cooling system been bleed properly if there is a trapped air pocket it will not let coolant circulate. Was the new thermostat installed correctly? They have a vent that needs to be towards the top or they trap air on the back side and cant take an accurate reading to open and close. Other areas to look at would be proper operation of the fan clutch, if they fail they can cause the fan to not lock up properly and supply enough air movement through the radiator. The aux. electric fans and their temp switches do you hear them coming on are they coming on at the right temp.

Aug 26, 2010 | 1995 BMW 5 Series

1 Answer

Hello Sir, I have replaced the radiator, radiator heat sensor, radiator cap, and all hoses. There are no leaks coming from the engine. I have also replaced the anti-freeze with BMW manufactured...


After the car is cool and has been sitting for a while, remove the radiator cap, have someone start the car, the coolant in the radiator should drop a little, and there should be movement, if there is no movement, let the car run for a while, with some systems it won't cycle enough to notice until the engine warms up. If there is still no movement, you likely have a bad water pump and/or thermostat.
Another method as a "just to be sure", drain the coolant overflow tank, and fill it with clean distilled water. Drive the car for a few days (carefully not to overheat it obviously, if the engine is getting too hot to drive normally don't do this test). If after a few days of driving the fluid in the overflow tank is still clear (water), then there is no circulation in the system.
It's usually best to start by replacing the thermostat, and then re-check. If that doesn't fix the problem it is most likely a water pump, or in very rare cases a plugged radiator or coolant passage.

Jul 18, 2010 | 1998 BMW 7 Series

1 Answer

Want to know how to change a thermostat on my 2004


It Depends on which engine you have, this is how it goes for both. I use a little RTV with a new ring as well.

THERMOSTAT REPLACEMENT (4.2L ENGINE)
Removal Procedure
1. Remove the necessary coolant from the radiator.
2. Remove the generator.
3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
4. Remove the thermostat housing bolts.
5. Remove the thermostat housing from the engine block.
6. Clean all of the surfaces of the thermostat housing.
7. Clean the sealing surface of the engine block.
Installation Procedure
1. Install the thermostat housing to the engine block.
2. Install the thermostat housing bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
3. Lubricate the inner diameter of the radiator hose with engine coolant.
4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
5. Install the generator.
6. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
7. Inspect all sealing surfaces for leaks after starting the engine.
THERMOSTAT REPLACEMENT (5.3L ENGINE)
1. Drain Radiator and remove the radiator outlet hose.
2. Remove the water pump inlet bolts.
3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure
IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Install the thermostat and thermostat housing to the water pump.
2. Install the thermostat housing bolts.15 N.m
3. Install the radiator outlet hose.
4. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
5. Inspect all sealing surfaces for leaks after starting the engine.

Mar 17, 2010 | 2004 GMC Envoy

2 Answers

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.

Nov 07, 2009 | 1988 BMW 7 Series

3 Answers

HOW DO YOU PURGE OR RELEASE AIR ONCE YOU REPLACE RADIATOR, WATER PUMP AND THERMOSTAT?


the thermostat (on bmw replacement parts) have an arrow that has to be installed facing upward.if this was done correctly,to bleed the system usually there is a bleeder screw on or near the expansion tank(where you fill the coolant) and possibly on the thermostat housing. i would recommend opening both bleeders and keep filling the system with coolant closing the lower bleeder first and then allow the rest of the air purge from the other bleeder screw.make sure the coolant stays full and be patient you can't wait TOO long.

Apr 20, 2009 | 1995 BMW 5 Series

1 Answer

How do you replace the waterpump on a bmw z3 2.2


3.0 Coupe

Removing and installing complete water pump (M52 / S52 /M52TU/ M54 / M56)

Remove alternator
drive belt, refer to Engine, Cooling and Exhaust - Engine - Drive Belts, Mounts, Brackets and Accessories - Drive Belt - Service and Repair - Procedures See: Engine\Drive Belt\Service and Repair
Note: M52/S52 The water drain plug is located on the exhaust side between cylinders 4 and 5 in the engine block (illustration).
M52TU / M54 / M56 The water drain plug is located on the exhaust side on cylinder 2 in the engine block.
Drain and dispose of coolant.

Installation:
Replace seal.
Tightening Torque, refer to Specifications - Mechanical. See: Specifications
Vent cooling system and check for leaks, refer to Engine, Cooling and Exhaust - Cooling System - Service and Repair - Procedures. See: Service and Repair
Release belt pulley,Release water pump.,Tighten two screws (M6) into thread of water pump and water pump out of timing case.

Installation:
Replace O-ring and coat with coolant as anti-friction agent.

2.5L Roadster
SAME PROCEDURE FOR PICTURES Email Me @ aol.com

Feb 21, 2009 | 2001 BMW Z3

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