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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,517
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996 engine from recycler with high leak down
I am helping a friend with his 996 which blew the IMS and its engine. He bought a used engine from a breaking yard in SoCal. We did a leak down test on it and one cylinder is at 80% leakdown. I am trying to contact the seller to find the history of the engine.
What is the likelihood of the engine sitting around for a long time having a bad leak down getting better after it has been run in a bit?
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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08-04-2017, 07:01 AM
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Registered
Join Date: Apr 2007
Location: wisconsin
Posts: 2,553
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Quote:
Where is the air going? Take off the valve cover, look at the valves... Get a cheap scope and look into the cylinders. |
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08-04-2017, 07:58 AM
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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,517
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Air is going out the exhaust ...
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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08-04-2017, 08:40 AM
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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,517
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No way to save this one. Rigged up the engine to do compression test and got zero compression on 6. The engine is going back.
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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08-05-2017, 04:50 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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That's the problem with a used 996 engine. Before install I'd scope the bores with #5 and 6 getting special attention, remove the sump/filter and inspect, oil analysis, crank push/pull test, 2000- replace the IMS, etc., etc.
Even then it's still a crap shoot.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. |
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08-07-2017, 08:37 AM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,476
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It's a shame they didn't check it. There is so much more to these watercooled motors than just the IMS.
Bruce |
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08-07-2017, 12:50 PM
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