11-07-2016, 01:41 PM
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#1
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Registered User
Join Date: Apr 2009
Location: MD
Posts: 268
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Water Pump: Transfer from Old to New Engine?
If you've been following my saga, I've just ordered a used engine with 41k miles to replace the one with 106k in my 2003 Boxster S.
Reviewing my service records, I see that the water pump was replaced just 13k miles and 23 months ago.
Is there value in moving the pump over from the old engine to the new? I'm trying to keep the total build cost down, but not if it doesn't make sense. I assume that it would need a new gasket, but is there a lot of labor involved in the swap before the new engine is installed? What is the recommended change frequency?
Thoughts?
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11-07-2016, 01:55 PM
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#2
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,794
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Yes, you can move it
A new Pierburg pump with gasket can be found for around $200
YMMV
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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11-07-2016, 02:39 PM
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#3
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
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I would not reinstall the old pump. New ones are not that expensive and you don't want to be doing it again to two weeks.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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11-07-2016, 03:37 PM
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#4
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Registered User
Join Date: Nov 2008
Location: Florida
Posts: 1,111
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Transfer the one from your blown engine, it has known miles on it. The one that came with your new engine could have as many as 41 thousand. Have you thought about installing an underdrive pulley while he's in there?
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11-07-2016, 05:07 PM
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#5
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Registered User
Join Date: Jan 2014
Location: New Jersey
Posts: 1,631
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I guess you have to weigh the cost of a gasket plus the cost of your mechanic removing the water pump off the old engine, and cleaning its gasket surface, vs. just putting a new water pump on the new engine.
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11-07-2016, 05:23 PM
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#6
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,492
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why not just remove the WP from old engine and keep it for safekeeping if new one takes a dump.
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11-07-2016, 08:44 PM
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#7
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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I'd install a new water pump. They're not particularly expensive and it can't take more than 15 mins while the engine is out of the car.
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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11-08-2016, 02:22 AM
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#8
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Registered User
Join Date: Oct 2013
Location: Atlanta, GA
Posts: 419
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No.
Install a new PierBurg - they are the OEM supplier for Porsche pumps for the Boxster. It will be 1/2 the price of the Porsche one. Or pay the extra $200+ for the Porsche one and you'll get to keep a cool Porsche branded cardboard box.
I wouldn't save the 13K pump as a spare.
Make sure the pump that's used has plastic impeller blades.
__________________
2001 Boxster S - Speed Yellow, Black Leather, Tiptronic, Jake Raby rebuilt 3.2 with IMS Solution
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11-08-2016, 02:52 AM
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#9
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Registered User
Join Date: Apr 2009
Location: MD
Posts: 268
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Haven't made up my mind yet, but I am sure of a few things
With unknown history on the "new" pump it will get replaced
I am risk averse, so if I replace it with new it will be an OEM part
Will it be obvious looking at the engine if the pump has been already replaced at some point in its life?
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11-08-2016, 05:14 AM
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#10
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Registered User
Join Date: Oct 2015
Location: Scituate MA
Posts: 870
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They are not particularly hard to replace with engine in car. Heck I did it and I am hardly a good DIY. A couple hours with jack stands.
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11-08-2016, 08:31 AM
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#11
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1999 base
Join Date: Dec 2011
Location: Coral Springs FL
Posts: 1,617
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Quote:
Originally Posted by Cbonilla
Haven't made up my mind yet, but I am sure of a few things
With unknown history on the "new" pump it will get replaced
I am risk averse, so if I replace it with new it will be an OEM part
Will it be obvious looking at the engine if the pump has been already replaced at some point in its life?
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usually if the pump was replaced, the gasket is going to be cut in the center.
read this article to better understand:
Porsche Boxster Water Pump and Thermostat Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article
focus on figure 3
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11-08-2016, 08:33 AM
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#12
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,492
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Quote:
Originally Posted by Cbonilla
Haven't made up my mind yet, but I am sure of a few things
With unknown history on the "new" pump it will get replaced
I am risk averse, so if I replace it with new it will be an OEM part
Will it be obvious looking at the engine if the pump has been already replaced at some point in its life?
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You can tell by the gasket but I'm not sure you can tell without removing the WP. If the WP gasket is 'uncut', you have an original WP.
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11-08-2016, 09:35 AM
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#13
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Registered User
Join Date: Apr 2009
Location: MD
Posts: 268
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Quote:
Originally Posted by Meir
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Thanks, I'll inspect the engine when it comes in
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11-08-2016, 09:36 AM
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#14
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Registered User
Join Date: Apr 2009
Location: MD
Posts: 268
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Quote:
Originally Posted by dghii
You can tell by the gasket but I'm not sure you can tell without removing the WP. If the WP gasket is 'uncut', you have an original WP.
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Thanks, I'll inspect the engine when it comes in
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11-08-2016, 04:37 PM
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#15
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,492
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I apologize...missed that the info had already been posted.
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11-10-2016, 11:21 AM
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#16
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Registered User
Join Date: Apr 2016
Location: Monterey
Posts: 56
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Id say just replace it. Had mine go out while I was on a road trip to Oregon. Luckily i was able to find the part and install it borrowing my friends tools, but almost had to extend my trip if i couldn't find the part or have the necessary tools! Planning to just preemptively replace mine every few years from now on just in case!
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2004 Porsche Boxster S
2004 Porsche 996 Targa
boxster S
Linear Mode
