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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 10-15-2019, 11:44 AM
audiophool audiophool is online now
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N62 coolant transfer pipe

Hey gurus, I have a friend with an N62 in his X5 and it blew coolant the other day. Leaking out the back of the engine area. I've heard and read all about the coolant transfer pipe and how/why they leak.

Question though: when the coolant spills into the valley under the valley plate cover (under the intake manifold), where does the leaked coolant go? I saw pictures that appear to show holes along the sides which would allow that escaped coolant to run along the top of the cylinder banks then out the back due to the angle of the engine as mounted.

In this picture, I mean the holes that are seen below the glove on the left side: https://cdn4.pelicanparts.com/techar...arge/pic12.jpg
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Old 10-15-2019, 02:08 PM
audiophool audiophool is online now
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On closer inspection, those holes go into the cylinder wall passages.

Now, when these blow coolant out the back, where is it coming from? If it's the plate between the engine and flex plate, this car is going to the scrap heap.
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Old 10-15-2019, 05:53 PM
bimmer7410 bimmer7410 is offline
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Quote:
Originally Posted by audiophool View Post
On closer inspection, those holes go into the cylinder wall passages.

Now, when these blow coolant out the back, where is it coming from? If it's the plate between the engine and flex plate, this car is going to the scrap heap.

You should be able to determine this if the coolant is pouring from between the engine and transmission. If its coming out those holes at the bottom then I'd say that the transmission would need to be dropped to get to that back plate
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Old 10-15-2019, 06:08 PM
BabyUnicornTaco BabyUnicornTaco is offline
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N62 coolant transfer pipe

At the rear of this engine the valley pan leaks back. If not the valley pan then the rear cover leaks. The rear cover comes down the bell housing. Well they both can come down the bell housing.


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  #5  
Old 10-15-2019, 10:19 PM
audiophool audiophool is online now
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Investigation will begin shortly. Stay tuned.
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Old 10-16-2019, 02:17 AM
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Burning2nd Burning2nd is offline
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sorry for the big picture.. BUT look closely ill try my best to make sense,,

IF your looking at this picture, you see the coolant heater tube return on the left hand side
ALL the way at the top of the picture. (left corner) there is a cut out on the valley pan this is where the coolant will drain off.. *after the pan has filled

the pan will fill and over flow on the rear of the passenger side,
it will run down the back off the engine and then over the bell housing and come out just about under the passenger side foot well

IT will not come out in between the transmission and engine.. that would be the cross over pipe behind the flywheel




On this picture it would be the lower left corner IDK if you can tell but there is just the ever to slight lower shoulder

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Last edited by Burning2nd; 10-16-2019 at 02:21 AM.
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Old 10-16-2019, 10:02 AM
audiophool audiophool is online now
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Thanks. We need to get this car from buddy's house to mine, about a 30 minute drive. I expect what has happened is the pan has filled as you say, and when he pulled up his steep driveway the coolant spilled all over the back side of the engine and onto the exhaust, making the steamshow that freaked him out. I think if we top it off and drive carefully, maybe with the rad cap loose, it'll make the trip. Otherwise the tow will be $200.
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Old 10-16-2019, 02:46 PM
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Burning2nd Burning2nd is offline
Under the lift arms
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I drove for about 5 months with a leaking valley pan ,

just make sure you are topped off.. make sure you have cabin heat,

HEAT TO MAX>. the whole drive.. you loose heat way before you get a indication of low coolant
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Old 10-16-2019, 03:20 PM
audiophool audiophool is online now
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True. He's been topping it off for the last few months but hasn't really noticed drips, so it's probablyl not a catastrophic failure like a grenaded expansion tank.
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Old 10-16-2019, 03:29 PM
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Burning2nd Burning2nd is offline
Under the lift arms
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at first it was a cup of fluid like every 2 or 3 weeks.. then it became a cup a week.. then a cup every other day,

and then it was i just couldn't keep fluid in it long enough to drive far enough to warm up..
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Old 10-16-2019, 05:27 PM
audiophool audiophool is online now
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Sounds about the same. And I'm now sure that tilting the car to go up the steep driveway was what dumped a bunch on the exhaust.
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