Question about BMW 325

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How to remove expansion tank on 325 i. cann't remove bottom

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  • Anonymous Mar 10, 2009

    I have the same problem and we can not figure out how to pry it loose. Any addl suggestions.

  • Anonymous May 13, 2009

    cannot remove upper assembly from radiator



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It's under pressure, have to pry it out

Posted on Feb 14, 2009


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1 Answer

BMW repair shop

You may have air in the cooling system, you need too bleed it using the bleed point on the top right of the radiator as you stand in front of the car

Mar 21, 2013 | 2001 BMW 325

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Are you talking the expansion tank? If so - Drain coolant first by going underneath the car and take off the protective shield and unscrewing the blue plastic screw (make sure the car is NOT hot!), under the reservoir you'll see an electronic sensor - carefully twist is a 1/4 turn counterclockwise and gently pull downward to remove this sensor don't force it, you don't want to pay $150 to replace it. Disconnect the hoses on the top and bottom of expansion tank by pulling up the metal tabs upwards then pulling the hose away from the tank. I believe there are two or three screws which hold the expansion tank bracket in place, unscrew these and pull the bottom of the tank away from the radiator then lift upwards on the bracket (the bracket and expansion tank should then come out). Get the old expansion tank off the bracket and replace. You want to take off the bracket because getting a new tank on the bracket is a B*TCH!

Reconnect in reverse order.

Make sure to bleed the cooling system properly to remove air pockets (please use BMW coolant and distilled H20 in 50/50 mix - it's not the same as your Prestone or other mass produced coolants). Last replace the expansion tank cap because that might have created the expansion tank cracking.

Good luck and hope this helps

Dec 16, 2010 | 1999 BMW 323 Series

1 Answer

Where do i put the antifreeze?

check your owners manual to find out the required ammount of antifreeze, then drain off approx half ofyou cooling water (detach bottom hose is easy way) then add approp ammount of anti freeze to radiator expansion tank and top up with water to correct level.

Nov 18, 2010 | 2001 BMW 325

2 Answers

How do I change the coolant

On the bottom of the radiator, there is a drain valve, just open it and drain fluid into a container, if you want faster drain, remove bottom radiator hose.
Good Luck!! Rate this post!!

Aug 14, 2010 | 1996 Chevrolet Lumina Mini

1 Answer

BMW 325, hard to start in hot weather.

before you try to start her again in hot weather, open your fuel filler cap, listen for any pressure release, close the cap, and try to start, if this works,then its just heat expansion in the fuel tank, replace the filler cap if this is the case

Aug 19, 2009 | BMW 325 Cars & Trucks

2 Answers

How to replace water resorvoir

there should be a bolt holding the tank onto the body. It also slips into a hole to keep it secure. You have to also disconnect the power cable from the rear of it and it should just lift up.

Apr 05, 2009 | 2001 BMW 325

3 Answers

Bmw 325i overheating

Check to see that the expansion tank is not broken or if not u have to do a leak test on the car .....if everything is fine then u have 2 bleed the car with heater on full blast

Jan 23, 2009 | 2001 BMW 325

2 Answers

Need to get the expansion tank out of bmw 323i 2000 cannot remove it any suggestions?

?? i think it's part of your radiator, it's all one piece.
if it's separate from the radiator it should be hanging there only with some screws or clips, the rest is just pressure.
the have some rubber grommets on the bottom that keep them tight

Dec 30, 2008 | 1996 BMW 318

1 Answer

Symbol lit up

there can be a yellow light in the cluster that looks like a small radiator or box with waves inside of it to indicate water. This light means that the coolant level sensor has detected a low coolant level. Typically the expansion tanks inside of these cars will crack from heat and age. A simple diagnosis is to check your coolant level and top it off. Do not forget to bleed it by unscrewing the bleeder screw found on the upper radiator hose while filling up the reservoir found on the right hand side of the radiator. once the coolant has been filled, tighten the bleeder screw back down but be careful not to over tighten. and finally screw on the expansion tank cap. run the vehicle to operating temperature and use a flashlight to inspect the engine bay for leaks. If there is a leak, it will need to be repaired. possible leaks are a cracked expansion tank, leaking radiator hoses, or a leaking water pump or thermostat.

Oct 29, 2008 | 2001 BMW 325

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