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YOUR RESEARCHWater pump
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gasket
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Reported cause · Original poster
The only thing was a small coolant leak at the bottom of the WP and the problem was the gasket.
Leading evidence: 'gasket' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'gasket' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace " the missing t-stat' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
I will let you know when the job complete and by the way yes i changed the WP because it was starting to leak.
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Performed · outcome unconfirmed
Replaced my WP @ 74,000 miles as PM when "Replacing" the missing T-Stat.
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Use on water pumps inside cylinder heads all the time
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Performed · outcome unconfirmed
I find sealant used on water pumps inside cylinder heads all the time..
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Rennlist: 1 discussions
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Hello folks..,
Yesterday i took off the water pump on my 994 C4 2000.
That easier then i tought . The last bolt on the water pump is not easy to reach but once you onbolt it the job is done.
I also decided to use the original water pump seal (from the Porsche dealer) and not the one i received with the new WP.(not the original one)
Now 2 questions...
Do you think it would be a good idea to use a sealer with the gasket seal
How can i screw the 10mm bolt to the good tork without a tork wrench.How will i know that i reach the good tork with just the use of my 10mm wrench.
Thanks in advance
Robert
Some use sealer. I didn't when I did mine last year. I just used the OEM metal gasket.
You only need 7.5 foot/pound per bolt for the water pump. Not much at all. Torque the others to get a feel of the force. Then approximate the last one. I actually torqued my bolts to about 9 to 10ft/lbs. Main issue is to not over torque these bolts.
Could you do a 1/4 turn past snug? Don't know what the proper torque is.
Couple questions though....
1. Why did you take it off? Leaking?
2. Why did you re-use the gasket? Instead of the new gasket?
I'm sure the wrenchers here will help out.
I think the issue he is facing is getting to one bolt, sounds like he plans to torque them all and is wondering how to reach that one....
right?
do you have a crows foot? (I have not see one of these done in the car...guessing)
Getting them all even and not too tight is the important thing here. You are threading the bolts into relatively soft aluminum and if even slightly over torqued can irreversably damage the threads in the motor case. Sometimes a good measure is to use an easily removable high heat thread locker. This will assure that proper torque when applied, which in this case is very low, will hold the bolts from not working loose. The locker will also help prevent any leakage if any of the threaded holes are not blind. Sometimes a thin smear of a non hardening sealer is advisable. It helps to fill any small small scratches or voids in the case or pump casting and assures a joint that will not seap or weep.
Thanks folks...,
For Pete of corse i bought a new gasket to replace the old one and i bought it at the Porsche dealer.(metal one)
I will try today to find a small torque wrench to torque the bolt at 7.5 foot/pound.
I will let you know when the job complete and by the way yes i changed the WP because it was starting to leak.
The pump was the original one...not bad for a 10 years old car
Thanks to all
Robert
I just bought a Crafstman 0-75 ft-lbs torque wrench from Sears for $24.99 since I needed one for some pulleys replacement on wifey's BMW. You def need one for your car DIY projects...
I just watched my water pump get replaced. Didn't seem to be any sealant from the factory. The tech made sure that the mating surfaces were clean, but didn't use any sealant for reassembly. No leaks.
For you folks....,
The car has currently around 60K on it and no there were no missing pieces on the blades.
The water pump looks still in a perfect condition and the bearings in it are still perfect( no grinding sound).
The only thing was a small coolant leak at the bottom of the WP and the problem was the gasket.
As the gasket is steel fabric the gasket with time get rusty and leak.
Of corse i will not use the old WP but this one is still in a very good condition.
Bye Bye
Robert
2000 996
I find sealant used on water pumps inside cylinder heads all the time.. It has lead to cracks, just like broken pump impellers.
I use the single layer metal gasket and install it dry, with the proper surface prep I have never had one leak. I avoid sealant in this area at all costs.
Ed, Just to add to the thoughts on my favorite part of the 996 - the Cooling System... Replaced my WP @ 74,000 miles as PM when "Replacing" the missing T-Stat. WP was in good shape with a slight bit of movement in the bearing. Blades where all good. My Third Water Pump in four months - First the 968 then the A6 then the 996 I should be good for another 10 years !
Thanks Jack!!
your heat problems all solved now? - you had that unique T-Stat, boy who would have guessed.
I have been good this week.... only been down to the shop once, or twice
No Temp problems Ed. The 996 is just fine... but it has spent more time on the battery tender then on the road. with the weather and tire issues with the 968 - it has been the Porsche of choice for all but the Bad weather duties the Quattro is assigned to. Next week is 996 week as the wife & I alternate carpool duties.
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