Cayenne 957 - Coolant Pipe Issue - Water Distributor
#61
I had my barb blow out a few months ago and tried repairing it by using JB weld to glue it back in but, that is now leaking after 3 months. I am now replacing the coolant distributor with the new threaded barb version. I have unbolted the old distributor and am now trying to figure out how to remove it. Is removing the fuel pump going to provide enough clearance or is there anything else I need to take off to get the distributor out? Is that cam stopper part something that will be needed if removing the fuel pump? I did not see that part and have only ordered the fuel pump o-ring.
#62
I had my barb blow out a few months ago and tried repairing it by using JB weld to glue it back in but, that is now leaking after 3 months. I am now replacing the coolant distributor with the new threaded barb version. I have unbolted the old distributor and am now trying to figure out how to remove it. Is removing the fuel pump going to provide enough clearance or is there anything else I need to take off to get the distributor out? Is that cam stopper part something that will be needed if removing the fuel pump? I did not see that part and have only ordered the fuel pump o-ring.
#63
I bought pretty much all the parts from ECS. https://www.ecstuning.com/b-genuine-...94810606106kt/
You will also need 2 coolant distributor gaskets - part no: 94810615401
And then I got 8 new screws just to be safe: 90038507201
The fuel pump O-ring should be part: 99970758141
Intake Manifold gaskets 8 needed: 948-110-146-01-M100
If you are doing the whole coolant pipe upgrade then some additional parts will be needed.
Updated aluminum coolant pipe: 948-106-069-10-OEM (Updated)
Aluminum thermostat socket - ECS part: ES#2771205
Thermostat gasket: 94810612402
Water pump housing sealing ring gasket: 94810653300
Not necessary but I replaced this hose as well: 95510632310
Will need some silicone synthetic grease on orings of coolant pipe. I used a small amount on inside of new hoses as well to get them on easily.
Good luck. PM me if you need parts manual or other assistance.
#66
Thanks a lot for the reply, good to know! I checked my v6 cayenne consumes about 50mL coolant fluid over 1500 miles and it got some white exhaust smoke from two tailpipes at stop. Is that related to the issues discussed here?
#67
That sounds more like a blown head gasket. I believe you need to do a leakdown test to check for that.
#68
That really makes me sweat in my air-conditioned office. I just checked: both oil and coolant caps are clean and normal. I didn't find oil or milk on top of coolant reservoir either, no engine check light either...
Last edited by douglas61; 12-19-2017 at 11:31 PM.
#69
Perhaps I should be commenting on a different thread since this is a little old but my 2008 S popped today. Confirmed the barb came out of the distribution tube. Fortunately it didn't happen when I drove to Ohio two weeks ago. Man, that would have been a bummer. Anyway, I have parts ordered and will start dropping the transmission and transfer case tomorrow....or over the weekend. I'm headed to NHTSA to leave a nice note.
Still love the vehicle and will shop for a Porsche after the wife's new what ever she decides to get is paid off.
Still love the vehicle and will shop for a Porsche after the wife's new what ever she decides to get is paid off.
#70
Perhaps I should be commenting on a different thread since this is a little old but my 2008 S popped today. Confirmed the barb came out of the distribution tube. Fortunately it didn't happen when I drove to Ohio two weeks ago. Man, that would have been a bummer. Anyway, I have parts ordered and will start dropping the transmission and transfer case tomorrow....or over the weekend. I'm headed to NHTSA to leave a nice note.
Still love the vehicle and will shop for a Porsche after the wife's new what ever she decides to get is paid off.
Still love the vehicle and will shop for a Porsche after the wife's new what ever she decides to get is paid off.
#71
Just to confirm, Porsche never did an actual recall to address this issue, correct?
I'm looking at a 2003 Turbo and the current owner is suggesting that this was taken care of by PO via recall, I just don't think that is true.
I'm looking at a 2003 Turbo and the current owner is suggesting that this was taken care of by PO via recall, I just don't think that is true.
#72
There are folks more educated on 955 recalls than I am but there are no recalls for the distribution pipe issue for 957 and with high confidence 955. I replaced mine with the updated part number with the threaded barb. It was a bear but it's done and I am up and running.
So there are two main categories of OEM related service on their dime. Recalls are for safety related issues, brakes, fuel, seat belts, air bag sometimes transmission cables etc, then there are campaigns which are non safety related issues such as defective intake manifolds, transmission coolers etc. Then there are cases where dealers or regional managers rather that will help you out if you are a avid customer.
There are articles here specific to 955s and the issues you will run into. If you are a wrench, I say BUY it or shop for a 957 which has many of the 955 issues resolved. If you can't wrench you will need a deep pockets for the up keep. I think there are issues with front suspension bushing issues, cooling pipes, maybe fuel pumps.....need to look it up. Just take the time, the info is here.
Last note, the Cayenne is a great way be to introduced into Porsche genetics and what I say is "proper" in regards to steering feel, brake feel and suspension. Mine has adjustable coil overs so I have dialed it in better than OEM damping but the handling of a 5500 lb vehicle almost defies the law of physics. Plus I tow a 20ft boat with mine.
ONE MORE THING, So my advice is research repairs here, get estimates on those repairs, how much can you set aside each month for maintenance, drive several before buying and if you don't have service records go back to the beginning of my sentence. It's not a 4runner but you could possibly lap a 4runner at any track!
So there are two main categories of OEM related service on their dime. Recalls are for safety related issues, brakes, fuel, seat belts, air bag sometimes transmission cables etc, then there are campaigns which are non safety related issues such as defective intake manifolds, transmission coolers etc. Then there are cases where dealers or regional managers rather that will help you out if you are a avid customer.
There are articles here specific to 955s and the issues you will run into. If you are a wrench, I say BUY it or shop for a 957 which has many of the 955 issues resolved. If you can't wrench you will need a deep pockets for the up keep. I think there are issues with front suspension bushing issues, cooling pipes, maybe fuel pumps.....need to look it up. Just take the time, the info is here.
Last note, the Cayenne is a great way be to introduced into Porsche genetics and what I say is "proper" in regards to steering feel, brake feel and suspension. Mine has adjustable coil overs so I have dialed it in better than OEM damping but the handling of a 5500 lb vehicle almost defies the law of physics. Plus I tow a 20ft boat with mine.
ONE MORE THING, So my advice is research repairs here, get estimates on those repairs, how much can you set aside each month for maintenance, drive several before buying and if you don't have service records go back to the beginning of my sentence. It's not a 4runner but you could possibly lap a 4runner at any track!
#73
There are still many threads popping up with people trying to find the source of coolant leaks so I wanted to add this one to the list of things to look for:
It's been a couple of years now since I did the water distributor connection fix on the Cayenne. Link here : https://www.6speedonline.com/forums/...ml#post4262401
On the 8th Jan 2017 the temp in Atlanta got down to 15degF. Colder than usual.
I noticed a disturbing pool of coolant on the garage floor about a foot and a half inside the right front wheel of the Cayenne.
I had this sinking feeling that maybe my fix had failed (even though the pool was on the opposite side of the vehicle) or that somehow the aluminum T or pipes had somehow developed a leak.
After inspection with a scope I was able to confirm that there was nothing wrong with either of these areas. I then also checked the expansion tank for cracks as well as the overflow and found nothing.
After a lot of searching I spotted the source of the slow drip as shown in the pic below (borrowed a pic from RenaissanceMan to illustrate location).
The low temperature must have contracted certain parts just enough (and possibly in combination with bolts which were incorrectly torqued or loosened over time) to allow the location where the water distributor joins the block to seep some coolant.
With a long socket extension and some elbow connectors (going in from below) I was able to tighten the 2 bolts shown in the pic. The left bolt was definitely not as tight as the one on the right and I got about a 1/3 turn on it with minimal effort. The right side bolt only turned about a 1/8 turn at most.
I used very little effort because 1 - the difficulty in getting to the bolt with the elbow connectors and, 2 - size of the head didn't allow for much grip from that angle, and 3 - I did not want to risk over torquing. Problem solved immediately and no issues in the 2 weeks since.
It's been a couple of years now since I did the water distributor connection fix on the Cayenne. Link here : https://www.6speedonline.com/forums/...ml#post4262401
On the 8th Jan 2017 the temp in Atlanta got down to 15degF. Colder than usual.
I noticed a disturbing pool of coolant on the garage floor about a foot and a half inside the right front wheel of the Cayenne.
I had this sinking feeling that maybe my fix had failed (even though the pool was on the opposite side of the vehicle) or that somehow the aluminum T or pipes had somehow developed a leak.
After inspection with a scope I was able to confirm that there was nothing wrong with either of these areas. I then also checked the expansion tank for cracks as well as the overflow and found nothing.
After a lot of searching I spotted the source of the slow drip as shown in the pic below (borrowed a pic from RenaissanceMan to illustrate location).
The low temperature must have contracted certain parts just enough (and possibly in combination with bolts which were incorrectly torqued or loosened over time) to allow the location where the water distributor joins the block to seep some coolant.
With a long socket extension and some elbow connectors (going in from below) I was able to tighten the 2 bolts shown in the pic. The left bolt was definitely not as tight as the one on the right and I got about a 1/3 turn on it with minimal effort. The right side bolt only turned about a 1/8 turn at most.
I used very little effort because 1 - the difficulty in getting to the bolt with the elbow connectors and, 2 - size of the head didn't allow for much grip from that angle, and 3 - I did not want to risk over torquing. Problem solved immediately and no issues in the 2 weeks since.
#74
Follow up. So got under there yesterday and to my surprise, the leak I was having now isn’t anywhere on the water distributor. This leak was coming through the tranny bell housing holes so got the endoscope and stuck it under the intake and bingo, coolant sitting in the valley.
While checking out the water distributor, it appears it was already previously replaced with the threaded in barb fitting. Good news.
Took the intake off and both of the coolant vent lines were leaking, and when I touched one of them, the plastic was so brittle it snapped right off. Can replace them without removing fuel lines but going to take them out anyways so I can clean the coolant crust out of the valley.
Threaded barb fitting on water distributor
Broken coolant vent line
While checking out the water distributor, it appears it was already previously replaced with the threaded in barb fitting. Good news.
Took the intake off and both of the coolant vent lines were leaking, and when I touched one of them, the plastic was so brittle it snapped right off. Can replace them without removing fuel lines but going to take them out anyways so I can clean the coolant crust out of the valley.
Threaded barb fitting on water distributor
Broken coolant vent line
#75
I circled the pipe in question in red on the picture that was posted by Renaissance.Man in one of his initial posts...