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X5 E70 (2007 - 2013)
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  #1  
Old 07-22-2018, 06:11 PM
NYCnoodleman NYCnoodleman is offline
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Mein Auto: 2008 E70 4.8
E70 4.8 coolant leak

Hi,
I have a coolant leak for the ages. . . . .
When i add coolant to the expansion tank it flows directly to the oil pan so I pulled the water pump (following flow of water).

-The head gasket was swapped and torqued to spec: issue not resolved.
-Valley pan tube was leaking and was swapped: issue not resolved.

Additionally, added coolant directly via rear coolant transfer pipe opening (rear of valley pan) and the coolant flows to the oil pan.

Additionally, inspected leak and observed it was not coming from rear weep holes, it was coming from oil pan outlet.

Would appreciate any help to resolve this matter. Thanks
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  #2  
Old 07-23-2018, 12:31 AM
deroy deroy is offline
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Mein Auto: X5 e70 4.8
So it's leaking somehere inside the block, right? Coolant ends INSIDE the oil pan?
Does it leak (gush) like no tomorrow, or slow trickle/drip?

Pictures would help, if possible.

With the head(s?) off, did you inspect the cylinder walls for cracks?

Last edited by deroy; 07-23-2018 at 12:36 AM.
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  #3  
Old 07-23-2018, 01:31 PM
deroy deroy is offline
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Mein Auto: X5 e70 4.8
Check the thread-of-all-threads by Schpenxel on his n62 engine rebuild/swap. 6 series sub forum. He posted a billion pictures in an umpteen pages long thread for you to get inspiration from.


Verzonden vanaf mijn iPhone met Bimmerfest
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  #4  
Old 07-23-2018, 06:56 PM
NYCnoodleman NYCnoodleman is offline
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Mein Auto: 2008 E70 4.8
Thanks

Actually read thru his post yesterday and found some useful info. Thanks
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  #5  
Old 07-27-2018, 03:44 PM
Alika808 Alika808 is offline
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Goggle this Bimmerfix.
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