How much coolant will I loose?....
#1
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My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
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Replaced water pump and hoses recently but was unable to replace O-Ring for temp sensor Item#3 when I replaced the lower rad. hose #2. Finally got it today saw a tiny leak from it being so old. Wondering if anyone knows how much coolant will come out when I take out the sensor. Just curious dont want a mess after Ive already cleaned everything up a few days ago. Thanks fellas.
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Replaced the same sensor last year. Lost only a few drops. With that being said, the car was parked for a few days cold and I left the reservoir cap on! If your quick you should only loose a minimal amount of fluid, but of course, prerpare for the worst and make sure you have enough on hand to replenish and be prepared for a cleanup in case.
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My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
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Replaced the same sensor last year. Lost only a few drops. With that being said, the car was parked for a few days cold and I left the reservoir cap on! If your quick you should only loose a minimal amount of fluid, but of course, prerpare for the worst and make sure you have enough on hand to replenish and be prepared for a cleanup in case. ![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
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My Ride: 545i
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Anytime bud! Good luck. Remember to keep the reservoir lid closed to keep the fluid from rushing out as it is a pressurized system. I replaced the entire sensor so it was literally pull one out and put the other one in. If you are actually replacing the O-Ring, depending on how long it takes it may spill more fluid. That is why I opted to change the entire sensor, also because I know the sensor probably will need replacing in the future anyway. Try to get something to catch the fluid handy in case. Speed is key! Good luck bud! Let me know how you made out.
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Had the same problem, and I lost a whoooooole bunch! hope you're luckier than I was. I am fortunate to have a dealer less than two miles from my house; ended up buying an entire new sensor as the ring isn't serviced separately. Yes, I could have hunted through the Autozone parts bin for a ring, but I'm not much of a gambler when it comes to that sort of stuff.
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like stated above, as long as the coolant system is NOT pressurized(hot) then you should be alright.
you could loosen the fill cap to relieve pressure, then retighten it before removing the sensor.
you could loosen the fill cap to relieve pressure, then retighten it before removing the sensor.
Last edited by turboawd; 01-23-2015 at 06:05 PM.
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My Ride: Sold: 545i, sport package, cold weather, 6MT
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As somebody else pointed out, the O-ring will take sometime to replace. Remember than when fluid is guzzling out of a hole, four seconds can feel like four minutes. I'd have something to catch the spillover fluid and also have some distilled water on hand to top up if you don't have an BMW coolant.
Also, be careful removing the sensor. I replaced all of my hoses a few months ago as preventative maintenance, but I was not able to remove that sensor without breaking it. This left me in a pinch, as I had to run over to the dealer and shell out $50 for a new one instead of waiting a few days for a $25 one from the internet. I might even have the old O-ring (which was only a year old) if anyone wants it.
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oops, edited my post above. coolant system should NOT be pressurized.
also, one other trick, when you remove the resorvoir cap, squeeze the upper radiator hose a bit, then tighten the cap while still holding the hose. this will cause a slight vacuum.
also, one other trick, when you remove the resorvoir cap, squeeze the upper radiator hose a bit, then tighten the cap while still holding the hose. this will cause a slight vacuum.
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Your toolbox should include a couple different sized rubber stoppers. They come in handy from time to time to stop leaks while you fiddle with things or get the right part.
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My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
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Anytime bud! Good luck. Remember to keep the reservoir lid closed to keep the fluid from rushing out as it is a pressurized system. I replaced the entire sensor so it was literally pull one out and put the other one in. If you are actually replacing the O-Ring, depending on how long it takes it may spill more fluid. That is why I opted to change the entire sensor, also because I know the sensor probably will need replacing in the future anyway. Try to get something to catch the fluid handy in case. Speed is key! Good luck bud! Let me know how you made out.
Had the same problem, and I lost a whoooooole bunch! hope you're luckier than I was. I am fortunate to have a dealer less than two miles from my house; ended up buying an entire new sensor as the ring isn't serviced separately. Yes, I could have hunted through the Autozone parts bin for a ring, but I'm not much of a gambler when it comes to that sort of stuff.
Careful....if the system is still hot, you could scald yourself. A $20 jug of BMW coolant is a lot less costly than a hand or an eye.
As somebody else pointed out, the O-ring will take sometime to replace. Remember than when fluid is guzzling out of a hole, four seconds can feel like four minutes. I'd have something to catch the spillover fluid and also have some distilled water on hand to top up if you don't have an BMW coolant.
Also, be careful removing the sensor. I replaced all of my hoses a few months ago as preventative maintenance, but I was not able to remove that sensor without breaking it. This left me in a pinch, as I had to run over to the dealer and shell out $50 for a new one instead of waiting a few days for a $25 one from the internet. I might even have the old O-ring (which was only a year old) if anyone wants it.
As somebody else pointed out, the O-ring will take sometime to replace. Remember than when fluid is guzzling out of a hole, four seconds can feel like four minutes. I'd have something to catch the spillover fluid and also have some distilled water on hand to top up if you don't have an BMW coolant.
Also, be careful removing the sensor. I replaced all of my hoses a few months ago as preventative maintenance, but I was not able to remove that sensor without breaking it. This left me in a pinch, as I had to run over to the dealer and shell out $50 for a new one instead of waiting a few days for a $25 one from the internet. I might even have the old O-ring (which was only a year old) if anyone wants it.
Definitely a good tip. Will look around for some.