Catastrophic Coolant Hose Coupling Failure Registry - Page 2 - Rennlist Discussion Forums



Catastrophic Coolant Hose Coupling Failure Registry

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Old 09-23-2010, 12:50 PM   #16
rlightfine
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2004
GT3
27,500 miles
Coupling attached to heat exchanger for oil cooler blew out top left side of engine) Porsche dropped the engine and replaced the part. 2 track events later the same thing occurred. a different dealer reattached the coupling with a stonger bonding agent and it has lasted through 5 track events. Coolant dumps all over the rear left tire when the part fails.
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Old 09-23-2010, 12:53 PM   #17
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2004
GT3
27,500 miles
Autobahn Country Club
drop engine and replace oil cooler hear exchanger.
2 events later same failure occured. Different dealer used a stronger chemical bonding agent and its held for 5 track events.
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Old 09-23-2010, 02:02 PM   #18
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Quote:
Originally Posted by 4porsh View Post
Year: 2004
Model: 996 GT3
Mileage: 40k
Circumstances surrounding failure: Button Willow Raceway park
Specific Coupling: J-fitting right side top of motor
Repair Solution: Safety wired J-fitting to near by bar for tension. Repaired myself.
So this car has had it happen twice then! Before I sold it to Joe I had the coolant hose fail (around 25K miles) but luckily it failed when I was just done pulling the car onto the lift at home. So no near death on track experience. Rather, just a mess of coolant to clean up on the floor below. Thank God there wasn't another car parked underneath.
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Old 09-23-2010, 03:05 PM   #19
fc-racer
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Year: 2007
Model: 997 GT3
Mileage: 23,000km
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Old 09-24-2010, 12:53 PM   #20
fdorn
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Year: 2001
Model: 996 TT
Mileage: 67,000 mi
Circumstances surrounding failure: shortly after a trip across the rumbles.
Specific Coupling: I believe 996 106 477 73 hose - but it was a glued fitting - not the hose
Repair Solution: 996 106 501 74 to superseded part 996 106 501 76
996 106 502 74 to superseded part 997 106 502 00 and 996 106 477 73 hose and fitting.








Last edited by fdorn; 09-24-2010 at 05:12 PM.
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Old 09-24-2010, 09:13 PM   #21
puma
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Year: 2001
Model: 996 TT
Mileage:65k miles
Circumstances surrounding failure: rolling on the highway
Specific Coupling:One of the glued and pressed fitting poped out
Repair Solution: Put some high time glue and glued it back.
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Old 09-24-2010, 11:17 PM   #22
himself
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Year: 2004
Model: 996 GT3
Mileage 28,000 miles [2009]
Circumstances: Turn 2 at Texas Motor Speedway
Specific coupling: one of the press fit heat exchanger couplings popped, not sure which one.
Repaire solution: new part from Motorsport division.
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Old 09-26-2010, 05:55 AM   #23
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A friend of mine with a 2004 GT3 has had this specific problem twice.
First at 26,299 miles and now at 30,525 miles. First time at
California Motor Speedway and then 2 track events later at
Buttonwillow. Dealer fixed it the first time (2 fittings) under
extended warranty, but now the warranty expired and the dealer wants
$1000.00 for 1 fitting.
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Old 09-26-2010, 12:45 PM   #24
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Quote:
Originally Posted by puma View Post
Year: 2001
Model: 996 TT
Mileage:65k miles
Circumstances surrounding failure: rolling on the highway
Specific Coupling:One of the glued and pressed fitting poped out
Repair Solution: Put some high time glue and glued it back.
High temp RTV or even JB Weld might well be the answer, but once we're resorting to the chemicals display at the local auto parts store, I think that's part of the problem, not part of the solution.
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Old 09-26-2010, 12:49 PM   #25
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Quote:
Originally Posted by andrew2008 View Post
A friend of mine with a 2004 GT3 has had this specific problem twice.
First at 26,299 miles and now at 30,525 miles. First time at
California Motor Speedway and then 2 track events later at
Buttonwillow. Dealer fixed it the first time (2 fittings) under
extended warranty, but now the warranty expired and the dealer wants
$1000.00 for 1 fitting.
At least in California, any fault or failure covered by warranty, which occurs during warranty is thereafter covered until permanently remedied. The given repair itself is covered only for a limited period -- for Porsche I think it can vary from 30 days to 90 days or a year in some cases and may or may not include labor costs. Porsche has clearly started a "cost control" process in its service organization and these are the kinds of cost they've tried to stop. I think this is a clear cut situation where Porsche cannot indemnify itself by making a temporary fix and denying subsequent failures.
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Old 09-26-2010, 06:22 PM   #27
Crazy Canuck
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Year: 2004
Model: GT3
Mileage: 12,000
Circumstances surrounding failure: No failure YET. Fear has prompted me to go with water and Water Wetter while waiting for a permanent solution.
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Old 09-26-2010, 10:24 PM   #28
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My 2005 996 GT3 had the same/similar problem that coolant was leaking from the J-hose (I think it is) at the right hand side behind the belts while I was at the turn 8 of Mosport International Raceway, no big issue and I was black-flagged back into the pit immediately. I don't know the root cause yet, lucky enough I was able to drive the car back to the Garage which is 100 km away from the raceway but I needed to add 1-2 liter of water for 2 times .
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Old 09-27-2010, 12:54 AM   #29
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Quote:
Originally Posted by H1386 View Post
My 2005 996 GT3 had the same/similar problem that coolant was leaking from the J-hose (I think it is) at the right hand side behind the belts while I was at the turn 8 of Mosport International Raceway, no big issue and I was black-flagged back into the pit immediately. I don't know the root cause yet, lucky enough I was able to drive the car back to the Garage which is 100 km away from the raceway but I needed to add 1-2 liter of water for 2 times .
Good to see you here. I am the yellow C2S who poked my head under your hood in the paddock.

Circumstances: Today... JUST LIKE PHOTO BELOW....VVV

J fitting was popped out of the block, unglued, and we pushed it back in. We could see the glue/epoxy on the approx 1 inch of exposed coupling. Glad to see you made it back safely.

Many cars, myself included, slipped and got sideways without knowing why as there was no apparent spill (turns 8, 9, 10 + front straight and even t1). Most pitted and started to check tire pressures, trying to figure out what was happening. Then we saw you come in with the smoking butt.

BTW, my offer still stands, want to trade cars

Last edited by FFaust; 09-29-2010 at 12:27 AM. Reason: Add comment about photo below
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Old 09-28-2010, 06:58 PM   #30
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Default GT3 Coolant line failure

Rennlisters, during my race at Miller Motorsport Park I had a coolant line failure that should not have occured. My 2004 GT3 has a secondary coolant line from the waterpump next to the primary coolant line. This secondary line has a press fitting into the waterpump with no fastner. It then travels up to the powersteering pump where it is connected. Both pumps have the pressed fitting with metal pipe, both pipes are joined with a rubber hose using hose clamps, I would image for vibration. It appears to have been bonded with adhesive, and after 7500 miles it failed, just popped out during a race which cost me my National Championship and possibly a engine. No warning, no drips or leaks, just pop and a spray of coolant on to the engine and right rear suspension.

Would like to hear if others have had the same problem, because trust me, I will give Porsche and ear full...

Look and weep...
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