991 Coolant Leak - DIY
#16
Where else have I seen a Triple Square? Used on a Constant Velocity joint?
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IXLR8 (03-26-2023)
#18
I am in the process of changing the gasket/ seal on a 2009 997.2 S unfortunately with my design it is extremely difficult to do. Reason being the thermostat housing has a long pipe which goes up and under the alternator where it connects to one of two main distribution cooling pipes. Even removing the thermostat housing and pulling that cover rearward a few inches does not help. I spent most of the day on and off cleaning both sides of the U shaped plastic pipe and the thermostat housing. Why, there is only a 1/4" space between the two pieces with which to work. A very tedious job. Looking back at this job I woulld go the shop manual route and pull the bumper, exhaust, alternator and r engine carrier bolts. Not a job for the faint of heart.
Rod
Rod
#19
Dealer warranty, water pump replacement
So I bought a 2017, 991.2 and before purchasing, I noticed some coolant residue did some research found a bunch of forms which was very helpful. Took it to the dealer and realized that the water pump had a 10 year warranty, which was awesome the dealer in Woodland ca. Porsche took care of it then 1000 miles later it is dripping again the Porsche dealership in Woodland is about 500+ miles away from me where I bought my car the Porsche dealership in Stevens Creek where I live says it’s not the water pump it’s the pipe leaking behind it and that wouldn’t be covered under warranty. Feeling a little bummed as this is most likely due to the original install by the dealer in Woodland. I don’t think my black pipe behind the water pump was upgraded, what should I do? Don’t want to drive it all the way back down to Woodland. Thanks in advance.
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norcal 991.2 (02-13-2024)
#21
Last edited by MingusDew; 02-13-2024 at 02:25 AM.
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norcal 991.2 (02-13-2024)
#22
I’m willing to do some repairs myself, but I’d rather build this relationship with this Porsche dealer just in case any further leaks occur. Just hoping they would have put it under warranty as it is related to the water pump.
#23
You need to remove the coolant pump to replace the black coolant pipe and it is far more of a job to do so. Since mine is not leaking, I just replaced the O-ring at the other end at the thermostate housing that was easy to get to. So far so good in 2+ years. Don't cheap out; get all new O-rings when doing the job.
Maybe call Porsche NA.
Last edited by IXLR8; 02-13-2024 at 04:35 AM. Reason: Typo, as usual.
#24
How does coolant pipe 3 come off? And is it this seal?
999 707 657 40 now 9A7 008 281 00 - O-ring 31 x 3.
999 707 657 40 now 9A7 008 281 00 - O-ring 31 x 3.
#25
How does coolant pipe 3 come off? And is it this seal?
999 707 657 40 now 9A7 008 281 00 - O-ring 31 x 3.
999 707 657 40 now 9A7 008 281 00 - O-ring 31 x 3.
#26
Once you remove coolant pipes 1 and 2 and remove the single E-Torx bolt holding the thermostat housing to the engine, the thermostat housing is loose and can be moved towards the rear, it will slide off coolant pipe 3. Coolant pipe 3 stays in place. And those are 31 x 3 O-rings.
Now to order the parts.
#28
By the way, I can't remember hiring any trades in well over 45 years, be it for HVAC, plumbing, electrical, concrete work, carpentry, vehicle repairs/maintenance, etc. except for the gas line installation, but only for legalities. Having to do it all myself to make sure it is done right is a burden, but one I am willing to live with. Do you want me to get going on aircraft maintenance next. Knowing it is done right and the money I save is a huge bonus.
Last edited by IXLR8; 04-14-2024 at 06:57 PM. Reason: Added HVAC and final comments.
#29
Coolant pipe leak
Thanks for sharing in detail the repair for the coolant pipe leak, I feel confident now for my repair. Unfortunately, I was the cause of my leak when I backed into a parking spot and lightly bumped the thermostat housing against a parking curb. Totally my fault but it really surprised me that just the slightest bump caused a leak. After my repair I will design and install a protective skid plate for that area.
#30
You need to remove the coolant pump to replace the black coolant pipe and it is far more of a job to do so. Since mine is not leaking, I just replaced the O-ring at the other end at the thermostate housing that was easy to get to. So far so good in 2+ years. Don't cheap out; get all new O-rings when doing the job.
Dealership told me $2000
an Indy told me $1400...sold, had my car towed there.
They then sheepishly called me back a couple times apologizing as they underestimated this job. Told them to just get it done. $3200 later I had no more coolant leaks. However I have been find a bunch of vacuum tubes they failed to reconnect. Think I got them all and can finally enjoy my car without the 'coolant fault warning' popping up. Sometimes just because you take your car to the pros doesn't mean they'll do a better job than you.