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N62 & N62-TU Coolant Pipe

N62 & N62-TU Coolant Pipe

Part Number: AGA-N62-6061
Price: $606.00
  • For those that who do not need a complete gasket kit, here is the AGA N62 Expanding Coolant Pipe by itself.

US Patent 9163761
US Patent 8464424

Need help? See frequently asked questions about the N62 & N62-TU Coolant Pipe

Downloadable PDFs

Models This Product Fits

  • 2002-2005: BMW 745I & IL (E65 & E66)
  • 2006-2008: BMW 750I & IL (E65 & E66)
  • 2004-2005: BMW X5 4.4i/4.8is (E53)
  • 2007-2010: BMW X5 4.8i (E70)
  • 2004-2005: BMW 545i (E60)
  • 2006-2010: BMW 550i (E60 & E61)
  • 2004-2005: BMW 645Ci (E63 & E64)
  • 2006-2010: BMW 650i (E63 & E64)
  • 2002-2005: Range Rover

Part Included

Quantity 1
Part # AGA-N62-6061
Description N62 & N62-TU Coolant Pipe
Total $606.00
6 Review(s)

I purchased the pipe after reading the issues others reported with the N62. I had planned to replace several gaskets at the 115K mile mark. With a majority of the top 1/2 tore down replacing the pipe was easy. Instructions were well done. Once the manifold was off it was obvious the original pipe had started to leak and would have been an issues soon. The coolant pipe from AGA made it a simple and logical step. Nearly 2 years later the pipe is still working well.

Just figured I would send out my thanks. I received the pipe and it is working awesome in my 2004 BMW 645ci. Your part saved me a significant amount of money and a lot of down time. I highly recommend your expandable pipe to all potential purchasers.

Hello Martin and everyone at All German Auto,
Well the story began one day at work, I was walking to my 745LI in the parking lot and I viewed a puddle of anti-freeze under the engine. Open her up and checked, couldn’t see anything at the time. Added water and went home. At home she leaked more, so I got underneath and there I located the dreaded weeping hole leak from the manifold. Having read many forums and threads, I knew this was the dreaded center of the universe problem that all 745 owners are worried about. Contacted my local BMW dealer, they quoted me $8700 for labor and $2800.00 for parts, I was like FORGET THAT! ARE YOUR CRAZY!! For that price I might as well buy a new car. But having read Bimmerfest and the links to AGA, I knew the solution. So I called up AGA, ordered my crossover pipe and the additional kit, total cost $899.00, overnight delivery then I ordered a new Water Pump and Belts and hoses and got to work. Total cost for everything needed $1400.00. I waited until Friday, got the car up on front ramps and started to go to work. I had reviewed the YouTube video martin had done, and I knew the TIS direction to get everything done. Started with the crossover pipe, it was so east to put this in, after getting the corroded and failed seal out and cutting the pipe with my recip saw it was easy pickings to it out, then putting the AGA pipe in was too simple. I put the new valley pan on and then closed her up, new pipes to the water pump, and then put the water pump back on and put new BMW antifreeze in. Wife got in the car, turned the ignition and without a hitch she came back to life, no leak, no weeping- nothing. Brand new in my opinion, and after 2 weeks post the repair, she runs smooth as silk. Savings for me- well over $9500.00 USD, and after reviewing the old crossover pipe verse the one from AGA, no doubt a bad design and vulcanizing the seal on as well was not smart. The AGA design is superior, and the pipe will last way longer than the ownership of this car, having already had her 7 years, I see her going way over another 7 with this repair completed. Thanks Martin, and thanks to Judi for an awesome turnaround on my order.

We recently had a failure of the coolant pipe seal on our 2004 BMW 545i (<60,000 miles) and were faced with a shocking $9,000+ repair estimate from our local BMW dealership. After looking into the issue online, we discovered your website and your expandable coolant pipe. We took the information back to the dealership the very next day to see if they might be willing to make the repairs using your part. Fortunately, they were quite interested to learn about the alternative repair and were willing to undertake the work. We ordered the part directly from your company and had it shipped to the dealership. The repairs have now been completed for a small fraction of the original estimate. The technicians at the dealership were very impressed with the quality of your product and are very confident in the effectiveness of the solution. We would like to express our sincere appreciation to your Company for making this solution available to us, and for the excellence of your customer service staff in facilitating prompt and efficient delivery of the product.

I have a positive comment on your 2003 745LI coolant tube fix. My local guy here at Montgomery Imports did my job for me for less than $2,000. He stands by your fix, and after 2 months, I do too.

great quality product!!

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  • Intake cam adjuster units, left & right
  • Intake manifold (BMW Tis operation 11-61-050)
  • Drain engine block for coolant
  • Valley pan/cover
  • Vibration Dampener (BMW Tis operation 11-23-010)
  • Water pump (BMW Tis operation 11-51-000)
  • STEP 2

    Cut cooling tube & remove rear part by hand.

    STEP 3

    Drill hole in front part of tube.

    STEP 4

    Pull tube out with lever bar.

    STEP 5

    Remove old seal w/pick tool. Clean Seal Groove: Completely clean is a must, use a small wire brush to remove ALL debris from old seal, inspect with mirror.

    STEP 6


    [Part # 11-53-1-710-048]

    Remove rear o-ring in back of engine block. Clean groove and install new o-ring. Part# 11-53-1-710-048 (Do not install the o-ring that comes on the pipe. It must stay in place on the pipe). Apply a little of the supplied grease to o-ring in rear of block.

    STEP 7


    [Part # AGA-N62-V SEAL]

    (Seal placed on tube for shipping purposes)

    Remove seal by hand from pipe

    Install engine block front seal.

    Flat end of the seal should be facing towards the front of the car when installed in engine block.

    Apply white grease (supplied in the kit) to new seal; fold seal and insert into hole (see drawing on the left for directions).

    Work seal into grove by hand.

    Seal must be completely seated before installing tube. If necessary, push seal in place with a blunt tool (blue nylon tool supplied)

    Take extreme care not to damage seal when installing.

    STEP 8

    Start with the tube collapsed. Lube tube on both ends with white grease (supplied in kit). Hold tube into engine block. Insert tube into rear of engine block. Turn tube so it expands, as front of the tube enters seal, observe front seal with mirror from water pump side as the tube goes into seal. Sealcannot be pinched. If seal pushes out, collapse tube a bit, turn tube without expanding a few turns and then continue expanding until seal can no longer be seen from water pump side.

    STEP 9

    Rotate rear ring so the machine notch is straight up. Angled side is towards rear of engine block and o-ring.

    Tighten tube by hand until it has tension on front and on the rear o-ring.

    Note: the back at the block is cast and will vary from car to car. It is normal for o-ring to contact more on top or bottom.

    Do not over tighten!

    STEP 10

    Final assembly and testing:

  • Install all parts to seal cooling system
  • Pressure test system to 15 Psi for a minimum of 3 hours.
  • Observe for leaks in system and no leaks from the hole in the front timing cover.
  • STEP 11

    For inquiries or further instructions please call our friendly and knowledgeable staff 760.738.4626

    How should the Coolant Pipe be installed?

    The tapered portion of the coolant pipe should be facing the cylinder head. Make sure the pipe sits evenly in the pocket and extends all the way to the water pump. Extend the coolant pipe until the seal is no longer visible. The coolant pipe can be hand-tightened until secure.

    Do you have to remove the water pump when installing the your coolant pipe?

    No, you are not required to remove the water pump when replacing the coolant pipe in an N62, N62-TU or N73 engine. However, removing the water pump will help give you more visibility so that you can ensure that your seal is sitting properly in the vehicle.

    What is the average repair time for the Coolant pipe replacement repair if I use your part?

    The N62 Coolant Pipe repair takes approximately 8-10 Hours to complete (10 hour estimate includes the water pipe removal).