First 986 project: Replacing water pump
I was almost home when I looked in the rearview mirror and noticed to my horror that I was trailing antifreeze. A lot of it. "Split hose," I sez to myself. I made it home without the temp in the danger zone. When I got under the car to have a look-see all the hoses looked fine, but antifreeze was dripping from the water pump.
I had to remove the panel behind the seats to obtain access to the top four bolts on the water pump and the serpentine belt. First, however, I had to finish draining the system, including the heater core. After removing the serpentine belt (which looked fairly new, btw) I managed to get the water pump and thermostat (I decided to also replace the thermostat as long as I was in there) off with only a moderate amount of swearing. Inspecting the water pump, I was instantly suspicious that maybe, just possibly, it was bad: http://986forum.com/forums/uploads02...1683430911.jpg The impeller looked like it had met a bear with a taste for plastic. I bought a new water pump, thermostat, and of course gaskets. Installing the new parts was fairly straightforward, although I'm probably the slowest mechanic on the planet because I'm meticulous to the point of it being OCD. I started in the morning and it was nightfall by the time I got her buttoned up again. Two kibitzing neighbors, whose legs and feet you can see in the photo, had abandoned me long before that. Lightweights. In summation, I'll say this: The more I see of the 986's innards, the more I suspect Rube Goldberg had a hand in its design. Not a complaint; merely an observation. |
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LoneWolfGal, first of all congratulations on your first repair! :cheers:
Now that you become more intimately involved with your car, it will put a smile on your face every time you drive your car :) I was surprised to see the melted plastic on the center of the impeller, you have to ensure to get all the air pockets out of the system to avoid any overheating issues. . |
I've got a 97 with 53k mi. Should I replace the water pump to avoid an upcoming failure?
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By all means! There are potential downsides to taking it to where it actually fails. |
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“Classic” status
Porsche has declared the 986 a “Porsche Classic” and is supporting it inside their “Classic” division.
Keep an eye on your water temps. It is possible, just saying, that parts of the plastic impeller have broken off and could block your smaller water passages inside your engine. Good job! |
From what I’ve read there’s a good reason Porsche used a composite impeller and I would recommend replacing with the same type of pump.
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I'm not sure what your EVAP problem is, but checkout this post. I posted some system description stuff I found online that helped me out a bunch.
http://986forum.com/forums/boxster-general-discussions/82728-coke-bottle-noise-fuel-filler-howling-noise.html |
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And speaking of parts, I get great service and prices from Luke at Sunset Porsche in OR :-) |
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The rest of the system is composed of hoses and a canister so also very easy to test. The major issue with the Evap system is access to all of the components. If you have a schematic to the system and understand the layout.... you should be able to test much of it with something like a Handy Vac...with it you can apply vacuum and see if it holds over a period of time. If it does then you know the parts of the system your testing have no vacuum leaks. |
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