Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 07-14-2016, 10:06 AM   #1
Registered User
 
Join Date: Apr 2016
Location: Norway
Posts: 132
Found impeller bit in coolant but the pump seems new

I am working through the problems on my newly aquired boxster. When flushing the coolant I found an impeller blade. The blade is black but the current pump has brown blades. The PO must have had a failure and changed the pump.

What is the best way to deal with this situation now considering I don't know what was done when it occurred? Judging from other goofs I've found, such as camshaft bearing bridges upside down etc. anything is possible.
__________________
1990 944 Turbo
2007 Renault Clio RS 197 (Sold)
1998 Boxster 2.5L Track Day/ Race Car
2011 Mistubishi i-MiEV
Norway
Bebbetufs is offline   Reply With Quote
Old 07-14-2016, 10:33 AM   #2
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,011
Check the heat exchanger on top of the engine. That is where other parts of the impeller my accumulate and obstruct coolant flow.
Gelbster is offline   Reply With Quote
Old 07-15-2016, 03:42 AM   #3
Registered User
 
Join Date: Apr 2016
Location: Norway
Posts: 132
Thanks.

Can it be flushed, or should I replace it?
__________________
1990 944 Turbo
2007 Renault Clio RS 197 (Sold)
1998 Boxster 2.5L Track Day/ Race Car
2011 Mistubishi i-MiEV
Norway
Bebbetufs is offline   Reply With Quote
Old 07-15-2016, 06:48 AM   #4
Registered User
 
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,322
Better replace it. I suspect you'll never get all parts out of it. Also it will not that easy to flush, because it's an combined water/oil cooler and you shouldn't mix up water and oil and you might need pressure to get everything out. So i think it's easier to replace.

Also replace all the seals. That is very important.

Regards, Markus
Smallblock454 is offline   Reply With Quote
Old 07-15-2016, 11:15 AM   #5
Registered User
 
Join Date: Apr 2016
Location: Norway
Posts: 132
Thanks guys.
__________________
1990 944 Turbo
2007 Renault Clio RS 197 (Sold)
1998 Boxster 2.5L Track Day/ Race Car
2011 Mistubishi i-MiEV
Norway
Bebbetufs is offline   Reply With Quote
Old 07-15-2016, 12:01 PM   #6
Registered User
 
seningen's Avatar
 
Join Date: Jul 2008
Location: austin
Posts: 730
Remove the water pump and see if you can flush the system backwards to see if any broken impeller parts have collected in a point that might be able to be dislodged and removed.

Not an expert -- but I have heard of blade parts breaking off and blocking passages in the heads which lead to hot spots and ultimately cracked heads.

Mike
__________________
Drivers: '08 Cayenne Turbo, 96 993 Çab/Tip (wife's) & '92 964 Cab
Race Cars: '75 911 RSR Clone & '99 Spec Boxster
mike@lonestarrpm.com
seningen is offline   Reply With Quote
Old 07-15-2016, 12:10 PM   #7
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,011
Not to start a ruckus but this is why I prefer metal blades to plastic.Yes, you need to check the w/p bearings regularly but I would do that anyway. As this thread indicates ,dismissing metal blades because the plastic ones do not abrade the crankcase half is only a part of the issue and open to rebuttal. Distributed broken plastic impeller blade parts cause different but expensive problems.
I do so wish Porsche had waited a little with the M96 and just copied/scaled up the Honda Valk flat 6. Lancia Flavia, & Subaru.
Gelbster is offline   Reply With Quote
Old 07-15-2016, 01:56 PM   #8
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,260
Let's hope no small impeller bits are blocking head cooling passages or you will have cracked heads and intermix
clickman is offline   Reply With Quote
Old 07-15-2016, 02:00 PM   #9
Registered User
 
seningen's Avatar
 
Join Date: Jul 2008
Location: austin
Posts: 730
Quote:
Originally Posted by Gelbster View Post
Not to start a ruckus but this is why I prefer metal blades to plastic.Yes, you need to check the w/p bearings regularly but I would do that anyway. As this thread indicates ,dismissing metal blades because the plastic ones do not abrade the crankcase half is only a part of the issue and open to rebuttal. Distributed broken plastic impeller blade parts cause different but expensive problems.
I do so wish Porsche had waited a little with the M96 and just copied/scaled up the Honda Valk flat 6. Lancia Flavia, & Subaru.
If you did that with a plastic one -- you would never have a problem either -- and in case of failure, you wouldn't have to toss the block.

I've seen the damage a metal blade causes.... not good.

I've also seen what non-OEM WPs have done -- had 2 die on me <1000 miles on two different Boxsters.... never again.

YMMV, but I'll stick to OEM plastic.

Mike
__________________
Drivers: '08 Cayenne Turbo, 96 993 Çab/Tip (wife's) & '92 964 Cab
Race Cars: '75 911 RSR Clone & '99 Spec Boxster
mike@lonestarrpm.com
seningen is offline   Reply With Quote
Old 07-15-2016, 09:51 PM   #10
Registered User
 
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,322
I'll do the metal one.

And i'm not afraid to do, beause i know what i do and why i'm doing it. But i don't want an endless discussion with people who don't understand the why. Only thing i can say is that you never put a metal impeller one in an engine where a plastic one has failed – NEVER! Also very important: there is a GT3 and a non GT3 version. And they are different!





Regards, Markus – the non conformist.

Last edited by Smallblock454; 07-15-2016 at 09:57 PM.
Smallblock454 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 01:29 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page