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  #1  
Old 09-30-2014, 02:45 PM
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Help with a coolant leak

So years prior my sister took our 2004 X5 4.4 to the dealership and they replaced the waterpump.

I had an issue and turned out to be the expansion tank, for $55 I ordered a new one online and installed it with three hoses and a screw, not quite the labor intensive project the dealership seemed to want to charge me for. I think the quote was $375?

So flash forward a year and I notice a spot under the X5 and the next day it is bigger, then it is really big and running down the street.... I deduce that it is not oil but the coolant collecting what grime is under there and initially presenting like an oil leak however once significant coolant leakage ensues the puddle clears up. Unfortunately the puddle is also getting bigger....

It will not leak while running. The expansion tank is dry. When the car is turned off it will start leaking from somwhere... It seems that the coolant is leaking onto the ground instead of being returned to the expansion tank.

I took the front cover off last night and thought I could see it coming from a weep hole way up on the front of the motor, it was impossible to see any source of leaking from the front. I'm an old school push rod V8 kind of guy, I know how to fix things I just don't know what things are on the 4.4 motor.

Any ideas or experience to offer?

Also, the pump at the front of the motor close to the ground on the passenger side, is this the power steering pump? OR does it have to do with the transmission?
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Old 09-30-2014, 04:10 PM
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Look up N62 coolant pipe leak. That might be it.


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Old 09-30-2014, 04:20 PM
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The pump you speak of sounds like the AC compressor - location wise.


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Old 09-30-2014, 04:39 PM
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If the weep hole is behind the pulley that turns the fan you are likely looking at the water pump. That's what they do when they start to fail.
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Old 09-30-2014, 05:06 PM
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The fan is electric on the N62. No pulley involved. I thought the coolant pipe leak showed itself via leaking from the weep hole on the front of the motor


Thankfully not an issue with my car at this time at 111k miles.


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Old 09-30-2014, 06:03 PM
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.1 decrease 0-60 time = $1000 & DIY
 
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Can you take a picture of where the coolant is leaking?
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Old 09-30-2014, 07:25 PM
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Where are you in Portland? I might be able to lend an extra set of eyes
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Old 09-30-2014, 08:42 PM
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I'm in West Linn, I'll grab some pictures to describe the issue.
And I feel like an idiot... pump is drivers side.
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Old 09-30-2014, 08:46 PM
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Quote:
Originally Posted by 70-k5 View Post
I'm in West Linn, I'll grab some pictures to describe the issue.
And I feel like an idiot... pump is drivers side.
Well I'm in Oregon City. Let me know ...

I wouldn't mind cruzing over for a bit.
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Old 09-30-2014, 10:58 PM
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The n62 motor still has a waternpump pulley. It just does not have a mechanical fan attached.
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