997.2 3.8 Engine Failure
02-04-2019, 06:03 PM
#271
Former Vendor
All 6 injectors have been marked with their cylinder locations, and will be heading to the lab tomorrow to be tested. Thats another piece of the puzzle.
02-04-2019, 06:06 PM
#272
Three Wheelin'
02-04-2019, 06:06 PM
#273
RL Community Team
Rennlist Member
Rennlist Member
02-04-2019, 07:02 PM
#274
Dammit - just when I had consolidated down to only stocking 2 oils in the garage for my 7 motors - DT40 for the 997s, Cayenne, and truck and DT50 for the 914 & 928 and Indmar Hammerhead marine engine, I now need to change to a different Driven oil for the DFI 957 Turbo S Cayenne
02-04-2019, 07:26 PM
#275
This post nailed it. This is exactly what has been occurring, and exactly why we’ve kept things under our roof.
l have the engine disassembled down to the long block now, l plan to stay on it the next 2 days and get it all disassembled, and measured up.
Here it is in my Morgue as of this morning at 0900... Stripped of it’s outerwear, its time to be gutted. I have been shooting video along the way, once its all said and done we will edit it into a Rennvision youtube video.
It will be great information and insight to see on your "Rennvision" youtube channel as well .
I will admit, some vids are tough to watch, especially rod bolt failure, because of the engine carnage, not because of you!
Very informative. Thanks!
Last edited by qikqbn; 02-04-2019 at 07:43 PM.
02-04-2019, 07:40 PM
#276
Rennlist Member
Thread Starter
Just spoke with Jake. He showed me the evidence and he was right on the money with his initial diagnosis. Stay tuned for the video
02-04-2019, 07:51 PM
#277
Former Vendor
Yeah, I was fairly confident in my assessment while the engine was still together. I went way out on a limb to tell you what I believed it was, and I normally won't do that :-)
The results of the latest used oil analysis backed things up really well, based on the elements I did see, but moreover by the elements I did not see in the oil. That helped firm up the hypothesis.
02-04-2019, 08:07 PM
#279
Dammit - just when I had consolidated down to only stocking 2 oils in the garage for my 7 motors - DT40 for the 997s, Cayenne, and truck and DT50 for the 914 & 928 and Indmar Hammerhead marine engine, I now need to change to a different Driven oil for the DFI 957 Turbo S Cayenne
02-04-2019, 08:09 PM
#280
Could you provide more detail on this? I guess if one wanted to use a UOA to monitor bore scoring what could they look for to catch it earlier? Or did Bronz pretty much catch it at a point where the end result would have still been the same?
02-04-2019, 08:13 PM
#281
RL Community Team
Rennlist Member
Rennlist Member
Just taking a break to wipe my tools down...
Yeah, I was fairly confident in my assessment while the engine was still together. I went way out on a limb to tell you what I believed it was, and I normally won't do that :-)
The results of the latest used oil analysis backed things up really well, based on the elements I did see, but moreover by the elements I did not see in the oil. That helped firm up the hypothesis.
Yeah, I was fairly confident in my assessment while the engine was still together. I went way out on a limb to tell you what I believed it was, and I normally won't do that :-)
The results of the latest used oil analysis backed things up really well, based on the elements I did see, but moreover by the elements I did not see in the oil. That helped firm up the hypothesis.
02-04-2019, 09:40 PM
#283
3rd Gear
Join Date: Dec 2012
Location: Indian Trail, N.C
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02-04-2019, 10:07 PM
#284
Bgoetz, ive been doing UOAs to monitor bore scoring, I think the key markers are aluminum and silicon per Charles N in an earlier response . I don't believe the Fuel % is a key marker as ive had Trace fuel for the last 45k miles on my UOAs, although Blackstone has advised that Techron/SI2 can escalate this.
02-04-2019, 10:20 PM
#285
Racer
I just pulled out my old Blackstone reports from before my engine rebuild. Guess what? Fairly dramatic increase in aluminum and silicon over several (5,000 mi) oil changes, ending with fuel dilution. That said, we already knew what the problem was from the classic, more obvious symptoms.