Bit of a predicament, advice appreciated
Page 1 of 2 12 LastLast
Results 1 to 10 of 20
  1. #1
    BMW god and all round funny guy, who happens to be a photoshop genius
    BFI God you need to get out more!
    Lee_h's Avatar
    Join Date
    Apr 2012
    Location
    Middlesbrough
    Posts
    6,260
    Car Specs:
    Year
    1994
    Model
    325i
    Engine
    2.5
    Fuel
    Petrol
    Thanks
    1,364
    Thanked 2,077 Times in 1,511 Posts


    Donate Please click the
    image to support
    BMWForums.info
    Click Here To Contribute To Our Site

    Bit of a predicament, advice appreciated

    So most of you will know the problems I have had with the radiator etc, the car is booked in with the garage tomorrow to be pressure tested and bled properly, in order to get it there I will be driving it, now here is the problem

    As the car dumped the coolant last week I have had to use what little coolant I had left and the rest water to fill it up to get it to the garage.

    So when I was bleeding the system tonight, because they was so little coolant in the system loads of steam was coming out if the bleed screw and eventually boiled over the top of the expansion tank.

    I am worried that if I drive it to the garage tomorrow with mainly water in (3 miles away) the steam will build up a lot of pressure and do some real damage.

    So to prevent this could I drive it with the bleed screw loosened to let the steam out? I know some coolant will come out but it won't let enough out to empty the system I don't think.

    Would this be safe?

  2. #2
    No longer has a car :(
    Moderator
    StK's Avatar
    Join Date
    Mar 2012
    Location
    London - east currently
    Posts
    3,836
    Car Specs:
    Year
    I
    Model
    don't
    Engine
    have a
    Fuel
    car :(
    Thanks
    2,594
    Thanked 2,531 Times in 1,756 Posts


    No don't do that. I suggest you try bleeding it properly as best you can and take loads of water in the car with you. Then the moment you see the needle rise past the middle stop and cool and bleed again. 3 miles is not to far so you may not need to st at all. Make sure you don't overheat though....

  3. #3
    BMW god and all round funny guy, who happens to be a photoshop genius
    BFI God you need to get out more!
    Lee_h's Avatar
    Join Date
    Apr 2012
    Location
    Middlesbrough
    Posts
    6,260
    Car Specs:
    Year
    1994
    Model
    325i
    Engine
    2.5
    Fuel
    Petrol
    Thanks
    1,364
    Thanked 2,077 Times in 1,511 Posts


    Quote Originally Posted by StK View Post
    No don't do that. I suggest you try bleeding it properly as best you can and take loads of water in the car with you. Then the moment you see the needle rise past the middle stop and cool and bleed again. 3 miles is not to far so you may not need to st at all. Make sure you don't overheat though....
    I have bled it the best I can but because my engine runs at over 100 degrees it is turning the water to steam and I am concerned that the pressure caused by this will do some damage

  4. #4
    The name is Derek but people call me Derek.
    BFI Hero
    DerekJr.'s Avatar
    Join Date
    Jul 2012
    Location
    Portsmouth, England
    Posts
    1,457
    Car Specs:
    Year
    1999
    Model
    E39 523i
    Engine
    M52TUB25
    Fuel
    Petrol
    Thanks
    633
    Thanked 672 Times in 421 Posts


    Can you get some coolant before you drive to the garage tomorrow? That would be my best advice.

    I'm sure your car will be fine. My temp needle just about reaches 1/2 way in 3 miles. Although, I don't know if the coolant affects it. Maybe water will make it rise quicker....

  5. #5
    BMW god and all round funny guy, who happens to be a photoshop genius
    BFI God you need to get out more!
    Lee_h's Avatar
    Join Date
    Apr 2012
    Location
    Middlesbrough
    Posts
    6,260
    Car Specs:
    Year
    1994
    Model
    325i
    Engine
    2.5
    Fuel
    Petrol
    Thanks
    1,364
    Thanked 2,077 Times in 1,511 Posts


    Nah can't get hold of any I put the last bit I had in tonight to get it ready for the drive tomorrow, might just have to take the risk

  6. #6
    Sometimes the world is still flat, especially if you can't see as far as the horizon
    BFI God you need to get out more!
    e36coupe-328's Avatar
    Join Date
    Apr 2012
    Location
    Greater Manchester
    Posts
    5,817
    Car Specs:
    Year
    1995 / 2001
    Model
    E36 / White Elephant
    Engine
    2.8 / 3.2
    Fuel
    LPG / Liquid Gold
    Thanks
    324
    Thanked 2,240 Times in 1,768 Posts


    Quote Originally Posted by Lee_h View Post
    I am worried that if I drive it to the garage tomorrow with mainly water in (3 miles away) the steam will build up a lot of pressure and do some real damage.
    Not having coolant / antifreeze in the water doesn't make steam build up. any hot coolant will make vapour into air locked space or boil away.

    All running a car full of water instead does it make it less efficient (pretty much only a hot day problem) and allow the head / block to corrode which is not really expected to be a big issue dor 1 trip

    All your problems appear to be air or wirst case you did the head gasket in.

    In the past if I have had issues with this type of thing in my Manta I tend to pop off a heater hose and use some copper pipe to put the hose pipe onto it then use another three feet of pipe held high up in the air, open all bleed screwas and caps off with open pipe held high turn tap on, once water overflows out of rad with no bubbles I put cap on then bleed screws and eventually water will come out of the 3' of hose held in the air then fit heater hose back on letting as little air in as possible. Butit's not mine and not a Manta so I would not recommend it.
    No warranty of any kind implied or given and no liability for any loss, damage or injury, no matter how incurred accepted.

    LPG Conversion "How to" Guide, Step by Step, Picture by Picture

    Free Gas Kit* now fitted to free 328*
    *Based on ROI period exceeded

  7. #7
    BMW god and all round funny guy, who happens to be a photoshop genius
    BFI God you need to get out more!
    Lee_h's Avatar
    Join Date
    Apr 2012
    Location
    Middlesbrough
    Posts
    6,260
    Car Specs:
    Year
    1994
    Model
    325i
    Engine
    2.5
    Fuel
    Petrol
    Thanks
    1,364
    Thanked 2,077 Times in 1,511 Posts


    Yes but surely the water will boil and create more pressure when my coolant temp is 104 degrees?

    Will I be ok driving it 3 miles?

  8. #8
    Sometimes the world is still flat, especially if you can't see as far as the horizon
    BFI God you need to get out more!
    e36coupe-328's Avatar
    Join Date
    Apr 2012
    Location
    Greater Manchester
    Posts
    5,817
    Car Specs:
    Year
    1995 / 2001
    Model
    E36 / White Elephant
    Engine
    2.8 / 3.2
    Fuel
    LPG / Liquid Gold
    Thanks
    324
    Thanked 2,240 Times in 1,768 Posts


    Adding impurities (coolant) to water raises the boiling point it is true. However, being under pressure raises the boiling point too. However, as air compresses easier than liquid if you have too much air in it doesn;t make enough pressure to stop it boiling.

    Hlaf the people on here that have had to fit, beg, borrow or pay for (see what I did there) an old radiator on a sunday afternoon will have filled up with water and grabbed antifreeze later in the week.


    Put it this way, bled with just water will cool better than airlocked with coolant in.


    As for 3 miles, I've driven further than that with no radiator or a radiator wrapped around the engine block before now, but not on a BMW engine or in anything I cared about. 1 traffic hold up and you would be wanting an engine.
    Last edited by e36coupe-328; 11-09-2012 at 20:41.
    No warranty of any kind implied or given and no liability for any loss, damage or injury, no matter how incurred accepted.

    LPG Conversion "How to" Guide, Step by Step, Picture by Picture

    Free Gas Kit* now fitted to free 328*
    *Based on ROI period exceeded

  9. #9
    BMW god and all round funny guy, who happens to be a photoshop genius
    BFI God you need to get out more!
    Lee_h's Avatar
    Join Date
    Apr 2012
    Location
    Middlesbrough
    Posts
    6,260
    Car Specs:
    Year
    1994
    Model
    325i
    Engine
    2.5
    Fuel
    Petrol
    Thanks
    1,364
    Thanked 2,077 Times in 1,511 Posts


    Quote Originally Posted by e36coupe-328 View Post
    Adding impurities (coolant) to water raises the boiling point it is true. However, being under pressure raises the boiling point too. However, as air compresses easier than liquid if you have too much air in it doesn;t make enough pressure to stop it boiling.

    Hlaf the people on here that have had to fit, beg, borrow or pay for (see what I did there) an old radiator on a sunday afternoon will have filled up with water and grabbed antifreeze later in the week.


    Put it this way, bled with just water will cool better than airlocked with coolant in.


    As for 3 miles, I've driven further than that with no radiator or a radiator wrapped around the engine block before now, but not on a BMW engine or in anything I cared about. 1 traffic hold up and you would be wanting an engine.
    So what do you think then? Should it be ok with just water?

  10. #10
    Sometimes the world is still flat, especially if you can't see as far as the horizon
    BFI God you need to get out more!
    e36coupe-328's Avatar
    Join Date
    Apr 2012
    Location
    Greater Manchester
    Posts
    5,817
    Car Specs:
    Year
    1995 / 2001
    Model
    E36 / White Elephant
    Engine
    2.8 / 3.2
    Fuel
    LPG / Liquid Gold
    Thanks
    324
    Thanked 2,240 Times in 1,768 Posts


    Your problem is the same with coolant or water, you can't get it to bleed properly so with either you may or may not make it to the garage with out an wrecked engine.

    it's one of those where you weigh the risks and make your choice. You could take it to the garage, you could have them collect it, you cold even have a mobile mechanic come to you, you could put the nose high on a slope or cheap pair of ramps.

    Personal choice.
    No warranty of any kind implied or given and no liability for any loss, damage or injury, no matter how incurred accepted.

    LPG Conversion "How to" Guide, Step by Step, Picture by Picture

    Free Gas Kit* now fitted to free 328*
    *Based on ROI period exceeded

Page 1 of 2 12 LastLast

User Tag List

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •