[AoxoMoxoA]

Also cheaper hose from a reputable vendor if you're just cannibalizing the connectors...

Does the connector portion even need to be cannibalized from a brand new part? These things fail as a result of the tubing getting brittle. I think the thicker connector portion of the assembly, with the o-rings, which bolt into the engine, are probably fine to reuse. Maybe just refresh the o-rings.

I've never heard of a leak being from a failed connector.

 

[Santirx]

Does the connector portion even need to be cannibalized from a brand new part? These things fail as a result of the tubing getting brittle. I think the thicker connector portion of the assembly, with the o-rings, which bolt into the engine, are probably fine to reuse. Maybe just refresh the o-rings.

I've never heard of a leak being from a failed connector.

Maybe, but $20 is a good deal to ensure you have good connectors. I think someone did mentioned here that the connector came out in pieces too, and that they were kind of hard to remove.

 

[drawz]

Yes that’s what I was thinking about. And also not wanting to get stuck in the middle of the job if the old one broke. Bonus - you can assemble the new hose in advance.

 

[Santirx]

Work done today… with car completely cold, I didn’t have to empty coolant… just disconnected the tubing fitting from vent clamp and slid through the side of the engine to allow it to drain below the level of the tubing I was going to take out.

This was all the coolant that drained…

When I removed the tubing from the engine, nothing came out. So it was a clean install.

Installation took a couple of hours due to (1) recording, (2) I’m too methodical… wanted this OEM looking…

More details to follow in the video…. This is a sneak preview. Now I need to reassemble things and test…

NOTE: my tubing was still fine… I actually had to cut it with plyers, and it didn’t come out in pieces… even the connecting fittings came out intact. I cut the tubing after the “T” and abandoned in place. I took the tubing connecting the metal tubing on rear of engine to the vent valve off… the rest is still there abandoned…. It will be fine…

 

[Santirx]

Brought car to temperature and test drove the car… everything great. Coolant temp is normal.

Although the tubing fittings came out integral, they could not be reused… the o-rings were flat and were not in good shape. So, buy new tubing for $20.

 

[drawz]

Nice job! Looking forward to the video! Definitely a preventative summer project for me.

 

[AoxoMoxoA]

Have we deduced whether the $20 “Bapmic” pipe assembly is the exact same part as the $100 +/- “Porsche” branded part?

 

[drawz]

Have we deduced whether the $20 “Bapmic” pipe assembly is the exact same part as the $100 +/- “Porsche” branded part?

I don't think Bapmic is a supplier to Porsche. I bring it up as an option from a reputable vendor instead of a random one off eBay/Aliexpress that someone else suggested. I probably wouldn't trust it if doing the standard replacement given how much labor is involved, but to just get the connectors for the modified approach....well maybe.

 

[Santirx]

I think that with all the money you are going to save by doing this, you might as well buy Porsche OEM and then forget about it... forever.

 

[ELerner61]

This is FANTASTIC work fellow grease monkeys! This kind of known, pending failure keeps me from driving my Macan more than 2 hours from home. I reached out to Porsche N.A. for some proactive relief and they told me to go scratch! Really, this could be the top value/time saving workaround I’ve come across in 40 years of home wrenching. Bravo!

 

[Zmonsta]

@Santirx good to know you can’t re-use the fittings, where did you get new fittings for $20? You also mention buying the OEM pipe since this retrofit would last longer than factory,, but that OEM pipe just to use the fittings is $100+ right?

 

[Santirx]

@Santirx good to know you can’t re-use the fittings, where did you get new fittings for $20? You also mention buying the OEM pipe since this retrofit would last longer than factory,, but that OEM pipe just to use the fittings is $100+ right?

I didn’t get fittings for $20, I was referring to someone else’s posting where you can get an aftermarket tubing for $20. In my case, I already had the tubing from Porsche, as I was paranoid about this failing on me… I was already planning on replacing the tubing preemptively.

I’m also very grateful to @dethbrd for this finding, as it turned this replacement from a huge nightmare to just a nice easy one… and as he said in prior post, it will last the life of the car.

 

[Santirx]

Video is out. I prioritized this one over the other close to 10 videos I’m currently editing… (I hope I had more time, but it is what it is)…

Watch on YouTube, rather than from the link…

How could Porsche get this so WRONG! The Coolant Vent Tubing Story & the EASY FIX... Macan 1st GEN

 

[drawz]

This is awesome. Great job @Santirx! Definitely on the to do list.

I can't help but wonder why Porsche would do it in such a complicated way though. It's baffling, but there has to be some reason. It would probably actually be cheaper to produce with this simplified routing.

Just a note for those planning to use silicone hoses - don't use standard worm clamps. They can dig into and cut the outer silicone casing. They make special clamps with a "lining" for these hoses. I think the clamps @Santirx used are most likely fine. I've also seen some discussion online that silicone hose clamps may need to be retightened occasionally, but I'm not sure how much truth there is to that.

Also, here's a comparison of EPDM (rubber) and silicone hoses from Gates, who makes both kinds: https://www.gatesaustralia.com.au/~...res/cooling-system-and-hose-products/epdm-vs-silicon-flyer-ausnz-april-2020.pdf

 

[ELerner61]

Nice work on the video @Santirx . Can I ask how many feet of hose you think is needed (looks like 5 feet would do)? Additionally, have you identified the quick connect to the coolant distribution hub (would be nice to use a straight connector).

Thanks for all the research.

 

[Santirx]

Nice work on the video @Santirx . Can I ask how many feet of hose you think is needed (looks like 5 feet would do)? Additionally, have you identified the quick connect to the coolant distribution hub (would be nice to use a straight connector).

Thanks for all the research.

5ft is fine for this project…. I got 10ft and ended up with more than half excess.

I haven’t identified the right fitting yet. I still need to measure fitting for right size.

 

[AoxoMoxoA]

Additionally, have you identified the quick connect to the coolant distribution hub (would be nice to use a straight connector).

@FRUNKenstein ‘s guy (Post 194) omitted the quick connection all together and clamped the hose directly to the nipple off the coolant vent hub.

 

[drawz]

@FRUNKenstein ‘s guy (Post 194) omitted the quick connection all together and clamped the hose directly to the nipple off the coolant vent hub.

Seems to me the quick connect is a good idea for serviceability, whether it's another mechanic expecting OE parts or if that vent valve needs to be replaced or any other reason that vent valve might need to be disconnected. Just a thought, but many ways to go about this.

 

[AoxoMoxoA]

Seems to me the quick connect is a good idea for serviceability…

Absolutely agree, and would prefer the quick connect, but good luck finding just that particular fitting!

 

[Santirx]

Just reusing the fitting and tying up the hose somehow like I did with a tie wrap/clip will be just fine.

I said I was going to buy a new one, but the old one is holding up well, so I won’t replace it.