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 25 should you really replace the water pump (Read 5388 times)
slattonfour
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should you really replace the water pump
Jan 3rd, 2011 at 8:47pm
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Should you really do this everythime? I mean replacing the pump everytime is expensive not to mention that when you do replace it its always with a new pump. Now I called Roger B ??? ???easley Porsche in Austin and the service department told me that every other time is more than enough and the timeimg belt should be changed at 45000 not 30000! So who is right here?
  
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Gages_944
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Re: should you really replace the water pump
Reply #1 - Jan 3rd, 2011 at 8:58pm
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Yea Im wondering the same. When I did my belts I didnt do the water pump.
  

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Re: should you really replace the water pump
Reply #2 - Jan 3rd, 2011 at 9:12pm
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Im doing my belts in a few weeks and not the pump.

I think the reason they want you to do both is because the new belt will but more tension on the old pump and cause it to leak
  

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dpoul34
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Re: should you really replace the water pump
Reply #3 - Jan 3rd, 2011 at 9:12pm
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When I changed out the timing belt, I had the water pump done as well, since there were no records of it ever having been done.

I've read and been told to change the timing belt at 30000 and the water pump at 60000 mile intervals.
  

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Re: should you really replace the water pump
Reply #4 - Jan 3rd, 2011 at 10:21pm
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The dealer is giving you good advice......that is if you know when it was done last.
  

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slattonfour
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Re: should you really replace the water pump
Reply #5 - Jan 4th, 2011 at 6:55am
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The last guy put a new water pump on at the last belt change. 8)
  
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IAN - 944ONLINE
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Re: should you really replace the water pump
Reply #6 - Jan 4th, 2011 at 7:18am
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this is my experiance as a Porsche parts seller of 40 years -

the timing belt is driven off the backside of the timing belt -
so that the impeller has been under a certain amount of tension for however long its been on there
when you change the belt
and change the tension that the impeller is now under
more often than not , after a couple to  3  weeks the pump seal starts to leak -
you have to remember that I sit at this desk 5 days a week - sometimes more
my MAIN business for the last 20  or so years has been the sale of  ONLY  944  parts --

how often do I get the call -

" oh I changed my timing belt a few weels ago
and now my pump leaks  -  why is that " ?

more times that I can count

thats my 2 cents worth
l
  

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Re: should you really replace the water pump
Reply #7 - Jan 4th, 2011 at 7:23am
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Quote:
the timing belt is driven off the backside of the timing belt -


haha, a little early for ya ian?  Wink

thats ok. we know what ya mean
  

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IAN - 944ONLINE
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Re: should you really replace the water pump
Reply #8 - Jan 4th, 2011 at 7:33am
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yep
stressed and its still early !!
been here over 2  hours already !!
  

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Re: should you really replace the water pump
Reply #9 - Jan 4th, 2011 at 8:43am
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The bottom line I think we can piece together from this thread is that yes, you can get away with replacing the water pump every 60k instead of 30k, but it's better to do it every time you do the timing belt.

Just like with the clutch hydraulic cylinders - one new part puts stress on the old part you didn't replace, and causes it to fail.

The original Porsche spec for 944 belt replacement was 30,000 miles. But this is 2011, and belt manufacturing technology and materials have advanced quite a bit, meaning they last longer.

That said, it doesn't seem like water pump technology has advanced any... sooo you probably want to do that every 60k or sooner. And of course, you may as well do the belts at the same time, as they have to come off and be retensioned anyway to do the pump. Catch 22 Smiley
  

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Re: should you really replace the water pump
Reply #10 - Jan 4th, 2011 at 9:26am
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IMO it's 'False Economy' to cheap out on the rollers and water pump. Like Ian said, couple of weeks down the road and your in there again.[BTDT] As some experienced, actual, Porsche mechanics have told me, "It's not that the Timing Belt wears out and snaps, its that a roller or WP freezes up first and THEN the belt snaps." As Clint Eastwood once asked..."Do you feel Lucky?" Shocked
  

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IAN - 944ONLINE
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Re: should you really replace the water pump
Reply #11 - Jan 4th, 2011 at 9:29am
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I also spoke to a couple of local Porsche shops
and asked them this question -
they told me that they would leave the decision upto the customer

HOWEVER

they would have the customer sign the repair order that they chose NOT to have the pump changed at this time
and that the repair shop was NOT responceable for any water pump leaks
  

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IAN - 944ONLINE
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Re: should you really replace the water pump
Reply #12 - Jan 4th, 2011 at 9:31am
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Quote:
The bottom line I think we can piece together from this thread is that yes, you can get away with replacing the water pump every 60k instead of 30k, but it's better to do it every time you do the timing belt.

Just like with the clutch hydraulic cylinders - one new part puts stress on the old part you didn't replace, and causes it to fail.

The original Porsche spec for 944 belt replacement was 30,000 miles. But this is 2011, and belt manufacturing technology and materials have advanced quite a bit, meaning they last longer.

That said, it doesn't seem like water pump technology has advanced any... sooo you probably want to do that every 60k or sooner. And of course, you may as well do the belts at the same time, as they have to come off and be retensioned anyway to do the pump. Catch 22 Smiley


correct
and what do you think happens to customers that use the carbon fiber timing belts ?
  

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Re: should you really replace the water pump
Reply #13 - Jan 4th, 2011 at 9:32am
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Yes, it's amazing how many people choose not to listen to professional auto techs.. when they are making you sign a waiver because you're refusing to do the service.. that's probably a sign that they're not effing kidding. Essentially "If you choose not to have this done, your car will break. I need you to acknowledge that."

lol
  

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slattonfour
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Re: should you really replace the water pump
Reply #14 - Jan 4th, 2011 at 12:58pm
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So is it ok to buy and use one of your rebuilt water pumps Ian ????
  
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