New Water Pump Hose Doesn't Fit
Thread Starter
Three Wheelin'
Joined: Apr 2010
Posts: 1,708
Likes: 78
From: Delaware, USA
New Water Pump Hose Doesn't Fit
I installed a new water pump this weekend, and I decided to replace a few hoses while I was at it. I ordered the water pump hose from Porsche (p/n 996-106-850-05), but it doesn't fit. It is slightly different than the existing hose, and given the tight spaces involved, the differences create angles that kink the hose.
I'm contacting Porsche about this, but does anyone have any thoughts? If this new hose is the current "standard substitiution", what have you done?
Thanks for any help.
See pic below.
*SOLVED* SEE POST BELOW
I'm contacting Porsche about this, but does anyone have any thoughts? If this new hose is the current "standard substitiution", what have you done?
Thanks for any help.
See pic below.
*SOLVED* SEE POST BELOW
Last edited by frisbee91; Nov 26, 2012 at 03:42 PM. Reason: Update 11-26-2012
Captain Obvious
Super User
Super User
Joined: Aug 2003
Posts: 22,846
Likes: 348
From: Cambridge, Ontario, Canada
You have to ask the dealer what other parts are needed to make the redesigned hose fit. I asked them when another hose was replaced but lucked out as it was a direct fit.
Race Director
Joined: Sep 2006
Posts: 19,035
Likes: 269
From: Bentonville, AR
Just a general comment that it is a very good idea to get part info from a dealer parts department. The part is looked up based on the car' VIN.
I can give two examples of why this rather important. In the case of my Boxster when the OE battery failed I got the battery part number from the parts department. The part number had changed. The new battery had more capacity and was physically larger. It fit though without any difficulty in the battery tray.
In another case I ordered new windshield washer nozzles. I learned the parts numbers had changed and for these new ones in order to work required two small additions to the wiring harness were needed. The original nozzles were not longer available either.
I can give two examples of why this rather important. In the case of my Boxster when the OE battery failed I got the battery part number from the parts department. The part number had changed. The new battery had more capacity and was physically larger. It fit though without any difficulty in the battery tray.
In another case I ordered new windshield washer nozzles. I learned the parts numbers had changed and for these new ones in order to work required two small additions to the wiring harness were needed. The original nozzles were not longer available either.
Thread Starter
Three Wheelin'
Joined: Apr 2010
Posts: 1,708
Likes: 78
From: Delaware, USA
Solved:
So, it turns out that in 1998, Porsche used one combination of water pump hose and lower rigid pipe on the 996 (shown as the top pair in the photo below. The rigid pipe has a goose-neck end). Sometime later (mid 1999?) they changed over to different design, where part of the curve is in the hose rather than in the pipe. (shown as in the bottom pair below.) However, the Porsche catalog indicates that ALL of the 99's have the later design, when they do not. The solution is to replace the rigid pipe along with the hose, which is annoying, but at least my car is back together.
Not sure which you have? Climb under the car and follow the hose up from the water pump. Just above the water pump, the hose has a tee that connects to the rigid pipe. If the rigid pipe has a nearly 180° gooseneck, you have the old style. If it is basically a 90° bend, you have the new style. I hope this helps someone in the future.
Old water pump hose: 996.106.250.52-2
Water pump hose: 996.106.850.05
Old hard pipe: 996.106.243.51 AS01
New hard pipe: 996.106.243.54
So, it turns out that in 1998, Porsche used one combination of water pump hose and lower rigid pipe on the 996 (shown as the top pair in the photo below. The rigid pipe has a goose-neck end). Sometime later (mid 1999?) they changed over to different design, where part of the curve is in the hose rather than in the pipe. (shown as in the bottom pair below.) However, the Porsche catalog indicates that ALL of the 99's have the later design, when they do not. The solution is to replace the rigid pipe along with the hose, which is annoying, but at least my car is back together.
Not sure which you have? Climb under the car and follow the hose up from the water pump. Just above the water pump, the hose has a tee that connects to the rigid pipe. If the rigid pipe has a nearly 180° gooseneck, you have the old style. If it is basically a 90° bend, you have the new style. I hope this helps someone in the future.
Old water pump hose: 996.106.250.52-2
Water pump hose: 996.106.850.05
Old hard pipe: 996.106.243.51 AS01
New hard pipe: 996.106.243.54
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Every Era of 911 Owner Explained in One Sentence
Verdad Gallardo
Thinking of Buying a Porsche? Do These 10 Things First
Joe Kucinski
Pixar Pals Turned Into 1-of-1 Porsches!
Michael S. Palmer
Theon Goes Full Carbon Fiber With Stunning New Build
Verdad Gallardo
Genius Porsche-Themed Gifts That'll Make Any Dad or Grad Smile
Joe Kucinski
10 Used Porsches Are Selling for Way Too Cheap
Joe Kucinski
Tuner Is Converting Porsche 911s Into Shooting Brakes
Verdad Gallardo
This Coachbuilt Creation Is A Modern Take on the Legendary Porsche 917
Verdad Gallardo
