996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Coolant hose failure on track - Pic & video

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Old Nov 27, 2011 | 10:53 AM
  #61  
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Originally Posted by PAULUNM
Also, Samco makes boost hoses, not coolant hoses.
I have a contact here that works at samco, I can get him to make me some coolant hoses. They do coolant hose kits for various other cars. But im wondering if this will solve the issue.
 
Old Nov 27, 2011 | 11:00 AM
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Originally Posted by Yazz911TT
Thanks for explaining this aerodude. Can you further explain, when people have had failures at the 'connection points', what exactly has happened? Does the metal end piece detach from the hose or does the metal connectoin actually pop out of the water pump connection?
I'll try -- but I'm not really an expert since it hasn't happened to me. It sounds like it's an adhesive problem, where the hoses are simply connected by adhesive which may lose its effectiveness over time. The older model cars seem to experience this more -- but unless they've changed something in the later model cars, it could be just an age thing. The other thing I'm not sure about is that you hear more about this occurring at the track. Are the coolant hose connections experiencing more stress at the track? Is it a heat problem?

Take a look at the following thread (below) -- it's a great writeup of the problem and one possible way to fix it. Although all the posts about this aren't consistent, it does sound like the engine has to be dropped to get to all of the connections. It's pretty labor intensive and I haven't heard many folks recommending that this be done as PM, unless you're having the engine out for other reasons too.

Hope this helps.

https://www.6speedonline.com/forums/...ark-werks.html
 
Old Nov 27, 2011 | 01:46 PM
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Thanks for the link Aerodude!! I had a good read of the first couple of pages and I like SharkWerks idea of putting a bolt thru the connections!! Its cost effective and just as good as welding in my opinion! I plan on doing this as my motor is currently out of the car and I am carrying out a 650+ upgrade. After reading so much about this issue, it has really scared me!! I couldnt afford to rebuild a motor or to lose the back end on a track and hit cars or barriers!! I'd be in TEARS!!
 
Old Nov 27, 2011 | 03:48 PM
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Find a competent shop to do the mod for you as Jon has. Have them welded in. If you're paying the labor to have the shop gain access to the water pipes, you are far better off having them welded than doing the Sharkwerx mod. No offense to the guys at Sharkwerx, but it's the better move to just weld them in.

Really disappointed that Porsche would GLUE water pipes to the block and the water manifold. It's absurd to think this would be an acceptable production approach to affixing water fittings in such an application.

Mike
 
Old Nov 27, 2011 | 04:00 PM
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Can some1 put pics up of exactly where the other 3 water pipes are. I'm going to do 6. I understand where 3 are on the left side branching off the main large coolant pipe that ripped in the OP's picture of this thread. Where are the other 3? I will get this done in the week or sumthing!
 
Old Nov 27, 2011 | 04:05 PM
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^ the fix that Sharkwerxs posted about is a good, cost effective solution to prevent the aluminum bungs from blowing out completely and ultimately causing harm or damage to both person and property. However I do agree that if the motor is out for any reason it's a better solution to take the necessary steps and have the bungs welded in. You don't even have to buy those fancy billet ones, the stock parts can be extracted safely and cleaned up/welded back in.

The benefit to Shark's fix is that most of the connections points can be done in mere minutes saving a good chunk of change, with the two PITA sections being the oil cooler housing fittings.
 
Old Nov 27, 2011 | 04:11 PM
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Originally Posted by Yazz911TT
Can some1 put pics up of exactly where the other 3 water pipes are. I'm going to do 6. I understand where 3 are on the left side branching off the main large coolant pipe that ripped in the OP's picture of this thread. Where are the other 3? I will get this done in the week or sumthing!

3 off the water pump housing, one off the right-upper coolant neck, two on the oil cooler housing(under the plenum), two off the left-upper coolant neck.


Send me an email to Rennessyfabrication@gmail.com and I'll forward an email to you with photos from the PET of the failure points that I had sent to another member.
 

Last edited by RennFab; Nov 27, 2011 at 04:23 PM.
Old Nov 27, 2011 | 04:44 PM
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the sharkwerks mod is for people who dont have the engine out. Even if you do the sharkwerks mod its only going to prevent the fitting from blowing out, it will still leak so Welding the fittings into place (with engine out) is the proper way of fixing the issue, The way porsche should have made the damn thing in the first place.

The hose issue is another thing all together (tho both are coolent related)
If samco made a hose kit it would be great update to old hoses, but if the fitting are not welded in place your going to have a nice samco hose attached to a blown out fitting. I think this is really going to be coming up much more often in the next few years.
 
Old Nov 28, 2011 | 06:22 AM
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Yazz911TT, there are 8 fittings total, 2 curved fittings and 6 straight ones.

Aerodude, just to be clear, the hoses are attached to the fittings with clamps, it is the fittings themselves which have been glued into the coolant manifolds that fail and blow out. Like was mentioned earlier, the Sharkweks fix will prevent a fitting blowout, but will not prevent a leak once the glue fails. Also, the Sharkweks fix is limited to the pipes that are accessible without taking off all the paraphernalia on the top of the engine, so many go unaddressed, at least that is my understanding of it.
 

Last edited by landjet; Nov 28, 2011 at 06:36 AM.
Old Dec 19, 2011 | 02:23 PM
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another one

I had my coolant fitting come out of the block in September at Pacific Raceway. I was running Water Wetter so the run group was able to drive under yellow caution instead of having to come in. I was going from full throttle to heavy breaking when it went and it threw me sideways going into a hard right hander (turn 3A). The person behind me when all this happened was the track chairman for our Porsche club and he knew I had water wetter in my car. I just got my car back today from the shop. It was really expensive to remove all the fitting and have new fittings welded in. I did several other items while the motor was out to take advantage of the situation. New Guards LSD, transmission cooler, intake plenum, under drive pulley, new hoses etc so now I am really broke. I attached a few picture of the process to remove and weld the new fittings in. Also note that the fitting that went on my car was the one under the manifold and this is the fitting that typically is not fixed or avoided with the less expensive work arounds. The shop said they will no longer do partial fixes now that they have seen this one go.
 
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Last edited by gbhstrat; Dec 19, 2011 at 02:29 PM.
Old Dec 19, 2011 | 05:26 PM
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nice fix. this is really crazy that it has to be done. It would be one thing if you just blew a seal and lost coolent but the fast that people are spinning out at high speed is abit crazy. Just what is it going to take for Porsche to step up and make something of it? I cannot beleave it
 
Old Dec 19, 2011 | 06:06 PM
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Originally Posted by lopro
nice fix. this is really crazy that it has to be done. It would be one thing if you just blew a seal and lost coolent but the fast that people are spinning out at high speed is abit crazy. Just what is it going to take for Porsche to step up and make something of it? I cannot beleave it
A good attorney needs to be willing to take this on and run with it before someone gets killed.
 
Old Dec 19, 2011 | 06:26 PM
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problem is whos going to front the retainer
 
Old Dec 19, 2011 | 06:28 PM
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Group buy?
 
Old Dec 19, 2011 | 06:48 PM
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im sure porsche has good counsel backing them

I would imagine we would benifit if our lawyer was a porsche fan and knew all the details or owned a car/engine with this type of coolent fittings.

surly there has to be a lawyer on rennlist thats a porsche enthusiast
 


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