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E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 04-28-2019, 03:29 AM
cmyachtie cmyachtie is offline
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N62 coolant pipe question

Can a leaking coolant pipe leave you stranded, or is it likely to be and remain a slow leak?

Reason for asking is that I am at 100k miles and am going on a 2000 mile road trip in 3weeks, my plan was to replace waterpump and thermostat as a preventative measure but have recently needed to add coolant, donít know yet where itís going as I have not been able to find any leaks. Would hate having to do the coolant pipe also now but also am getting concerned about that damn pipe......
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2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
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  #2  
Old 04-28-2019, 03:59 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by cmyachtie View Post
Can a leaking coolant pipe leave you stranded, or is it likely to be and remain a slow leak?



Reason for asking is that I am at 100k miles and am going on a 2000 mile road trip in 3weeks, my plan was to replace waterpump and thermostat as a preventative measure but have recently needed to add coolant, donít know yet where itís going as I have not been able to find any leaks. Would hate having to do the coolant pipe also now but also am getting concerned about that damn pipe......


How much coolant are you losing? You need to check the coolant level daily if you have a decent leak. This area will fill up and then either seep through a leaking valley pan or out of the front weep hole. Those are the only spots it will leak to. Click image for larger version

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  #3  
Old 04-28-2019, 04:43 AM
cmyachtie cmyachtie is offline
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The last month or so had to add coolant twice I think, but don't drive much either, about 500 miles per month.
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My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #4  
Old 04-28-2019, 05:12 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Making a 2,000 mile road trip sounds like you will be driving a lot of miles in single days that does not allow you to check coolant levels because it will be too hot. You might have a pretty good leak and not know how much you would lose on that longer trip. A little risky.


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  #5  
Old 04-28-2019, 09:22 AM
H F H F is offline
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Why drag a coolant leak on and on .. It can leave you stranded and ruin more than your day .
Leaving for a long trip knowing it's leaking is not the smartest thing to do . Just fix it right and replace the pipe . Then have the peace of mind knowing it's not going to leave you stranded with a cracked head ...
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Old 04-28-2019, 09:27 AM
PinkFlamingo PinkFlamingo is offline
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Is it that you haven't found where it's leaking yet or you haven't seen any coolant leaking? Personally I wouldn't take that risk especially if you don't understand where the coolant is going. You don't want a major blowout in the middle of nowhere. There is a Y connector under the intake that goes from the tank to both sides of the engine on the top. The connector is plastic. Mine disintegrated and once that goes it won't hold any coolant - it will pour out as fast as you put it in and it's a MAJOR pain to get to.
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Old 04-28-2019, 12:56 PM
OakTone OakTone is offline
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Originally Posted by PinkFlamingo View Post
There is a Y connector under the intake that goes from the tank to both sides of the engine on the top. The connector is plastic. Mine disintegrated and once that goes it won't hold any coolant - it will pour out as fast as you put it in and it's a MAJOR pain to get to.

This is *exactly* what happened to me last year. At first I assumed it was the dreaded coolant pipe leak and pictured an expensive indy repair or time-consuming DIY. Similarly realized it was too fast to be that seal, and the coolant wasnít coming from the weep hole.

That Y connector is a PITA, but also a cheap part to replace with dramatic results if itís the culprit. No leaks since (fingers crossed)!

These engines are powerful but reallllly sensitive to overheating. Learned the hard way with the M62TU in my old E38.

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  #8  
Old 04-28-2019, 03:43 PM
cmyachtie cmyachtie is offline
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Thanks for the words of wisdom......I had planned to do the waterpump and thermostat before the trip already have them ready to go but since the low coolant warning appeared a couple of months or so ago, first time I didn't think much of it but as it happened a second time I have been getting concerned about it.
Did an oil change today and had a good look everywhere where coolant would be leaking....but nothing visible anywhere, which leaves me with where is it going. Weeping hole in front is dry and nothing visible near rear of engine either so am rather stumped at this point.Nevertheless have been creating a shopping cart that's now at $700. Cdn and growing, just not looking forward to pulling the intake just yet not knowing the pipe is in fact leaking.
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My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #9  
Old 04-28-2019, 03:51 PM
BabyUnicornTaco BabyUnicornTaco is offline
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N62 coolant pipe question

You might as well get the loaner pressure tester from advance auto or somewhere similar. $200 up front and you get it all back. Be easy to find your leak. Peace of mind before your trip. I picked up same day.


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  #10  
Old 04-28-2019, 08:03 PM
cmyachtie cmyachtie is offline
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Originally Posted by BabyUnicornTaco View Post
You might as well get the loaner pressure tester from advance auto or somewhere similar. $200 up front and you get it all back. Be easy to find your leak. Peace of mind before your trip. I picked up same day.


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Yeah great minds think alike...was gonna try to get something to do that tomorrow hopefully it will give a direction to go at.

Also am evaluating this replacement pipe just canít get to the AGA price.....
https://www.eeuroparts.com/Parts/366...-11141439975R/

There are some not so good older reviews (2013)for the URO pipe but it seems the recent reviews are better, anyone know if they have made any improvements to their design?
__________________

My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #11  
Old 04-28-2019, 08:13 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by cmyachtie View Post
Yeah great minds think alike...was gonna try to get something to do that tomorrow hopefully it will give a direction to go at.



Also am evaluating this replacement pipe just canít get to the AGA price.....

https://www.eeuroparts.com/Parts/366...-11141439975R/



There are some not so good older reviews (2013)for the URO pipe but it seems the recent reviews are better, anyone know if they have made any improvements to their design?


I just installed the URO. No issues. Iím happy to provide more info.


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  #12  
Old 04-28-2019, 09:16 PM
tstiglich tstiglich is offline
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Not sure what the scene is in Canada, but here in Michigan I can rent a car for $200, give or take, with unlimited mileage for a week. Granted, it is a little car, but gets better gas mileage. So, when I go on 2k mile trips, I take a rental and put the miles on that. With the increased gas mileage, it is pretty much break even - and no depreciation on my car.
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  #13  
Old 04-29-2019, 04:38 AM
cmyachtie cmyachtie is offline
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Originally Posted by tstiglich View Post
Not sure what the scene is in Canada, but here in Michigan I can rent a car for $200, give or take, with unlimited mileage for a week. Granted, it is a little car, but gets better gas mileage. So, when I go on 2k mile trips, I take a rental and put the miles on that. With the increased gas mileage, it is pretty much break even - and no depreciation on my car.
Thx am checking it out right now....looks like Herz has got me a Camry or similar for $23cdn per day according to google. I need it for 10-12 days so thatís quite doable for me.
Am beginning to like that....piece of mind during trip and not having a deadline to throw parts at the BMW and then after all that finding out that the heater core is the culprit during my trip.
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My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #14  
Old 04-30-2019, 10:13 AM
08E60550i 08E60550i is offline
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+1 for the URO pipe. I installed it over 2 years ago and still running strong. Just make sure the seals are properly seated before installing the pipe.
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  #15  
Old 04-30-2019, 10:34 AM
BabyUnicornTaco BabyUnicornTaco is offline
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After you install the URO pipe once, if it would ever fail it would be due to the o-rings. The o-rings on the URO pipe are not fused onto the pipe like the original BMW pipe so you could theoretically just collapse the pipe, replace those o-rings, and expand it again.
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  #16  
Old 04-30-2019, 12:59 PM
HighMileClub HighMileClub is offline
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I just did the URO pipe last week. It was a high quality piece except for the cheap aluminum clearance shims. The new rubber O-rings are quite beefy. Make sure you clean out the valleys where the O-rings are placed, and make sure the new O-rings seat perfectly.
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  #17  
Old 04-30-2019, 01:57 PM
cmyachtie cmyachtie is offline
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Originally Posted by HighMileClub View Post
I just did the URO pipe last week. It was a high quality piece except for the cheap aluminum clearance shims. The new rubber O-rings are quite beefy. Make sure you clean out the valleys where the O-rings are placed, and make sure the new O-rings seat perfectly.
Any reasons why not using some Permatex ultra gray gasket material to secure those o ring?

I ordered the URO pipe and was thinking about adding some.

I overhauled my grandson's Impreza engine as he blew an engine rod-bearing this winter and that Permatex seems to stop leaks on the Subaru everywhere.
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My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #18  
Old 04-30-2019, 02:00 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by cmyachtie View Post
Any reasons why not using some Permatex ultra gray gasket material to secure those o ring?



I ordered the URO pipe and was thinking about adding some.



I overhauled my grandson's Impreza engine as he blew an engine rod-bearing this winter and that Permatex seems to stop leaks on the Subaru everywhere.


I donít see a need. They are greased in and if you have the pipe clipped tight in the middle those gaskets are there to stay.


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Old 04-30-2019, 02:13 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Just for a little more URO pipe info. The directions state you will hear a ďclickĒ when the pipe is installed correctly. If you expand the pipe slowly you wonít hear the ďclick.Ē The click they reference is just the pipe touching the front timing cover and back of the block when expanded. I called URO on this when I didnít hear the ďclickĒ myself.


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Old 04-30-2019, 02:16 PM
H F H F is offline
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Quote:
Originally Posted by cmyachtie View Post
Any reasons why not using some Permatex ultra gray gasket material to secure those o ring?

I ordered the URO pipe and was thinking about adding some.

I overhauled my grandson's Impreza engine as he blew an engine rod-bearing this winter and that Permatex seems to stop leaks on the Subaru everywhere.
Those o rings are locked into groves , so when you slip the pipe in , it makes a nice tight fit .. there is no need for Permatex .

I did mine about four years ago and have not had any leaking issues . Just make sure you don't damage the oring during installation..
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Old 04-30-2019, 02:24 PM
cmyachtie cmyachtie is offline
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Originally Posted by H F View Post
Those o rings are locked into groves , so when you slip the pipe in , it makes a nice tight fit .. there is no need for Permatex .

I did mine about four years ago and have not had any leaking issues . Just make sure you don't damage the oring during installation..
I ordered an extra set of o rings just in case, as I donít wanna wait on if it goes south on me.
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My current daily driver:
2004 545i.... Aux+SB Chime+Dig speedo+iDrive discl. Coded+BT streaming MOD.Added. And the "mschumpert Trunk lid hack". Replaced TCU with a 2007 version that works!
1998 528i, 5 spd manual, black on black non DSP. SOLD @348Kkms.
My previous rides worth mentioning:1970 GTO "The Judge",1985 325e M3lite, Euro BMW +
1998 mTech 323Ti, in Munich, Germany on the autobahn for 1 yr
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  #22  
Old 04-30-2019, 04:49 PM
bung206 bung206 is offline
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Installing the o-rings is the easiest thing ever. I also ordered two sets after reading how its "soooo hard" but really as long as you use your common sense and don't try to force it into place then force the pipe on top of that you will be fine. $30 wasted.
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  #23  
Old 04-30-2019, 05:17 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by H F View Post
Those o rings are locked into groves , so when you slip the pipe in , it makes a nice tight fit .. there is no need for Permatex .

I did mine about four years ago and have not had any leaking issues . Just make sure you don't damage the oring during installation..


It comes with plenty of grease. Grease it up good.


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Old 04-30-2019, 05:19 PM
bung206 bung206 is offline
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Seconded. That is my philosophy in life in general.
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  #25  
Old 04-30-2019, 05:35 PM
mlanuto mlanuto is offline
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I installed the URO pipe a little over 10k miles ago - no leaks. The reviews of URO issues are pretty old.

If you have a slow coolant leak it is very common for the coolant expansion tank to leak slowly, particularly if you can't seem to find the leak. If the leak were the transfer pipe you would know, especially if it has been a few months.

remove the engine tray and let the engine run for a bit with some cardboard underneath, check for coolant puddles on the cardboard and trace upward the engine to find the source.

most coolant leaks are not that hard to DIY on this engine - the exception being the transfer pipe, but with a good DIY writeup it is well within the realms of someone with basic diy skills.

The water pump can also leak slowly when its on its way out, but it usually goes unannounced.

Whatever it is, you don't want to let a coolant leak go unsolved with a long roadtrip ahead as it is likely with many heat cycles and long durations of the engine being on, the leak will get worse quickly on your trip.
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