Gambled and Lost
10-07-2013, 10:03 PM
#46
Captain Obvious
Super User
Super User
This doesn't automatically mean it came from one of the valves. Possible that someone dropped one and never bothered to go after it.
10-07-2013, 10:30 PM
#48
Former Vendor
When working with engines we assume nothing and quantify everything. If this keeper is indeed missing it won't be the first time we have seen this with a symptomless, running engine. I see people scatter parts all the time because they assemble things with assumptions.
Just because it runs, doesn't mean that its healthy.
I'd hate to know that the factory was this sloppy, but then again I have found missing O rings from 9a1 engines with 4,165 miles on them since they left the factory. It never even had an oil change before I took it apart to transform it from a 3.4 to a 4.2. It had cylinders wearing like mad and all components that receive boundary layer protection were seeing signs of wear from a lack of oil film strength due to aeration.
Here it is..
Last edited by Flat6 Innovations; 10-07-2013 at 11:10 PM.
10-10-2013, 01:40 PM
#49
It was a solid car for me over 3 years of ownership and 15,000 miles of driving. Even the Porsche dealership said it was in great shape when I had the 60,000 mile service done. Only thing to go bad on it was the battery which was 5 years old at the time, and I bought 2 new key fobs for it because the old ones were worn out.
10-10-2013, 01:57 PM
#50
Nordschleife Master
We must quantify that the valve keeper either is, or is not missing.
When working with engines we assume nothing and quantify everything. If this keeper is indeed missing it won't be the first time we have seen this with a symptomless, running engine. I see people scatter parts all the time because they assemble things with assumptions.
Just because it runs, doesn't mean that its healthy.
I'd hate to know that the factory was this sloppy, but then again I have found missing O rings from 9a1 engines with 4,165 miles on them since they left the factory. It never even had an oil change before I took it apart to transform it from a 3.4 to a 4.2. It had cylinders wearing like mad and all components that receive boundary layer protection were seeing signs of wear from a lack of oil film strength due to aeration.
When working with engines we assume nothing and quantify everything. If this keeper is indeed missing it won't be the first time we have seen this with a symptomless, running engine. I see people scatter parts all the time because they assemble things with assumptions.
Just because it runs, doesn't mean that its healthy.
I'd hate to know that the factory was this sloppy, but then again I have found missing O rings from 9a1 engines with 4,165 miles on them since they left the factory. It never even had an oil change before I took it apart to transform it from a 3.4 to a 4.2. It had cylinders wearing like mad and all components that receive boundary layer protection were seeing signs of wear from a lack of oil film strength due to aeration.
10-10-2013, 02:28 PM
#53
Former Vendor
Car was never tracked. Never had the oil changed from the factory.
This is not just a missing O ring, this missing part impeded the oil from being de-aerated. That meant a huge loss of boundary later protection and a total loss if film strength.
This is not just a missing O ring, this missing part impeded the oil from being de-aerated. That meant a huge loss of boundary later protection and a total loss if film strength.
10-10-2013, 03:25 PM
#56
So there's no vacuum leak detected by the DME even when the o-ring is absent? So anything short of a physical inspection would not catch such defect?
10-10-2013, 03:28 PM
#57
Former Vendor
No vacuum there.. This is the supply side of oil from the scavenge side of the pump to the de-aerators. This is secondary waste oil being returned from the cylinder heads.
We'll see what long term effects are for the 9a1. We have 3 years of development in the 9a1 platform thus far and have already found the weak points and strong points, others will follow suit as time progresses.
We'll see what long term effects are for the 9a1. We have 3 years of development in the 9a1 platform thus far and have already found the weak points and strong points, others will follow suit as time progresses.
10-10-2013, 03:41 PM
#58
No vacuum there.. This is the supply side of oil from the scavenge side of the pump to the de-aerators. This is secondary waste oil being returned from the cylinder heads.
We'll see what long term effects are for the 9a1. We have 3 years of development in the 9a1 platform thus far and have already found the weak points and strong points, others will follow suit as time progresses.
We'll see what long term effects are for the 9a1. We have 3 years of development in the 9a1 platform thus far and have already found the weak points and strong points, others will follow suit as time progresses.
10-10-2013, 03:53 PM
#60
Race Director
^ Yup, same question here. Seems like PNA should have been on the hook for the diagnosis and subsequent remediation, given what the diagnosis revealed.