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Old 11-11-2009, 02:50 PM   #1
All German Auto Custom Cooling Pipe Saves 745 (N62) Owner Thousands in Repairs
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posted by tim330i

All German Auto has developed a custom solution for repairing a 60+ hour, $10,000 coolant leak problem on BMW 745 N62 V8 motors for less than $2,000 completed.

Symptom: Coolant Leak
Coolant will be leaking from hole in front of timing cover (located close to water pump towards passenger side). In front timing cover, hole approx: .

Rubber seal on aluminum cooling tube has failed. Coolant is leaking into back area of engine timing cover and out of hole.

Bigger Problem:
Replacing this seal/tube is a very, very big job and very expensive.

Install an AGA collapsible cooling tube. We have designed a tube and seals that can be installed (by experienced tech) in under 10 hours.

A potential $7,000 $9,000 repair job is now achieved for less than $2,000. Additionally, the repair can be completed same-day compared to 2-3 weeks.

Expanding Cooling Pipe for 745I & IL model year 2001- 9/2003 N62 Engine

Video -

AllGermanAuto's YouTube Channel -

Get more information about the All German Auto Expanding Cooling Pipe on their website here - https://www.agacoolantpipe.com/product/n62-coolant-pipe

Or view the full details in PDF format here - https://www.agacoolantpipe.com/sites...%20updated.pdf

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Old 11-14-2009, 11:16 AM
BM2U BM2U is offline
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wow good find man. My car just hit 100k should I change it? or wait for leaks?
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Old 11-16-2009, 04:35 PM
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dekidex dekidex is offline
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Last edited by dekidex; 11-16-2009 at 04:36 PM. Reason: wrong thread.
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Old 11-23-2009, 04:18 PM
745ByMySide 745ByMySide is offline
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This company deserves a lot of credit for that part. I just got a sense of ease knowing that if I ever have that problem I can tackle it myself. Thanx AGA
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Old 12-28-2009, 06:03 PM
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momo_oo[][]oo momo_oo[][]oo is offline
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Is that the part for the infamous Weephole problem. Great Job Guys
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Old 02-02-2010, 11:19 PM
JC745IL JC745IL is offline
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i am new here and i would liek to know if this is something that should be done as a preventive measure or just wait until it happens and get the part?

will appreciate the comments on this

thank you
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Old 03-30-2010, 04:10 PM
E91AWD E91AWD is offline
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Great ingenuity. Now if only BMW hadn't designed it so it would cost 10K for a failed seal to be replaced.

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Old 04-13-2010, 09:38 PM
Mavacpjm Mavacpjm is offline
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AGA Solution Rocks

I have done this install just this weekend and it worked flawless. Took me about 7 hours all up, while I was in there I installed a new water pump, belts, new valley pan which comes with the extended kit, as well as new manifold gaskets, new temp assembly for the water pump. No leaks at all, flawless product. BMW should have made the crossover this way in the first place. Way to go AGA!!!!!!!!!!

Total cost for the AGA kit was $899 overnighted included everything. + $400 for temp assembly and water pump and belts etc... Savings = $9000 in BS labor on a defective part and seal!!!!!! Not to mention the labor on the water pump which depending on the BMW dealer you go to is anywhere from $ 1200 to $ 1500

Last edited by Mavacpjm; 04-13-2010 at 09:43 PM.
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Old 06-16-2010, 03:20 PM
jw08 jw08 is offline
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I've heard about this problem, but have never seen it first hand. Hats off to All German Auto for coming up with this repair. Not just for coming up with a way to cut hours on the job, but replace the failed component with a much higher quality and more durable part. Great job, guys.
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Old 06-19-2010, 05:18 PM
ricanhype ricanhype is offline
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Thankyou all german auto!!!!


I just finished getting this done in Orlando by Hans Foreign Car Service and we purchased the pipe created by All German Auto. It has saved me thousands of dollars and works awesome! I am so glad that I found this post and that Hans Foreign Car Service had the guts to be the first ones to do this in Orlando. I highly recommend this to anybody that has this issue.


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Old 06-23-2010, 08:48 PM
meangreen94z meangreen94z is offline
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Its a bit of hack method, but this correction existed for years with the BMW part. You pull the valley pan and cut the coolant pipe with a cutoff wheel or reciprocating saw in half to remove. Wipe out the metal shavings. Put the new pipe in a vice and cut in half. Slide a 3-4" hose of fitting size over one end of the pipe with two hose clamps. Install the two ends into position, center the hose over the cut and tighten the clamps. Even if the hose/clamps were to leak at some point, its coolant leaking within coolant.

The parts will be less than the above kit by several hundred dollars

Last edited by meangreen94z; 06-23-2010 at 08:50 PM.
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