10-09-2015, 08:30 AM
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#1
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Registered User
Join Date: Mar 2013
Location: Spencer, MA
Posts: 112
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Testing Oil cooler?
Ok it was easy to remove but how the heck do you test it? Either these are impeller chunks or spark plug tube chunks:
__________________
Located in Central Mass.
'00 Boxster
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10-09-2015, 09:11 AM
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#2
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Registered User
Join Date: May 2014
Location: S.California
Posts: 2,029
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The heat exchanger (not a cooler to be pedantic) is exactly where the broken black plastic impeller pieces lodge. Not good for coolant flow.
If you read the water pump impeller threads you will notice a couple of things:
1. Helpfully ,Raby mentions the circulation of broken impeller vanes, few respond.
2. Preventative maintenance -replacement every 50/60K gets groans of derision.
3. If you suggest using a metal impeller+ routine replacement howls of derision.
4. The heat exchanger is not the only place the small plastic pieces accumulate...you find this out when you totally dismantle and clean the engine for rebuilding.
Somehow you need to remove all the broken pieces left by the mechanic when he slapped in a new w/p. Do a coolant flow test ?
Good luck and tell us what you find?
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10-09-2015, 09:38 AM
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#3
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,538
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Quote:
Originally Posted by Duquette5
Ok it was easy to remove but how the heck do you test it? Either these are impeller chunks or spark plug tube chunks:
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Easy, if the debris is in an oil passage, it is spark plug tube bits or chain tensioner wear pads; if it is in the coolant passages, it is from the water pump.
Pulling and holding a sustained vacuum for 1 hour on both the coolant and oil sides is the best test.
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“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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04-14-2022, 06:29 AM
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#4
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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Quote:
Originally Posted by JFP in PA
Pulling and holding a sustained vacuum for 1 hour on both the coolant and oil sides is the best test.
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Wondering what you use to do this? I've been chasing a small leak that replacing the O rings didn't fix.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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04-14-2022, 08:38 AM
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#5
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,538
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Quote:
Originally Posted by Paul
Wondering what you use to do this? I've been chasing a small leak that replacing the O rings didn't fix.
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To vacuum test it, an hand held MityVac vacuum pump system and some rubber plugs gets the job done:
__________________
“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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04-14-2022, 09:32 AM
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#6
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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Thanks for the quick reply. I have one of those, just have to search the shop to find the correct sized rubber plugs, etc.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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05-23-2022, 10:55 AM
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#7
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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My leak was the coolant passage cover which is directly below the oil cooler.
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05-23-2022, 12:15 PM
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#8
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,064
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Glad to hear you got it covered! What's next? Self-repair? Indy?
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1998 Porsche Boxster
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05-23-2022, 01:24 PM
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#9
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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I’m a retired Indy, A new updated gasket solved the leak.
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