The 930 rebuild.........beginning to end, the process in pictures
08-01-2006, 04:40 PM
#76
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That engine has been REALLY HOT in those last 32 hours (looks like to me based on the look of that rocker arm).
When I built mine I did everything myself, except for the machine work. Costs me $22K with the EFI components. That was with ME doing the work, and not paying someone else (except machine shop of course).
Brian
When I built mine I did everything myself, except for the machine work. Costs me $22K with the EFI components. That was with ME doing the work, and not paying someone else (except machine shop of course).
Brian
08-01-2006, 04:47 PM
#77
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That is the underlying thing about this engine rebuild - the oil temps were verified as nice and low -- BUT the internal heat just killed it.
P&Cs
Turbo
Rockers
Heads
all got way too hot, beyond their thermal capacities.
This evaluation comes not from me, but from the numerous parties directly involved in the rebuild.
P&Cs
Turbo
Rockers
Heads
all got way too hot, beyond their thermal capacities.
This evaluation comes not from me, but from the numerous parties directly involved in the rebuild.
08-01-2006, 05:26 PM
#78
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Originally Posted by RSRS
That is the underlying thing about this engine rebuild - the oil temps were verified as nice and low -- BUT the internal heat just killed it.
P&Cs
Turbo
Rockers
Heads
all got way too hot, beyond their thermal capacities.
This evaluation comes not from me, but from the numerous parties directly involved in the rebuild.
P&Cs
Turbo
Rockers
Heads
all got way too hot, beyond their thermal capacities.
This evaluation comes not from me, but from the numerous parties directly involved in the rebuild.
08-01-2006, 05:32 PM
#79
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the oil temps were verified as nice and low
What was the temp on the gauge?
It definitely looks like it was hot. Not sure though how that's anyone else's fault (Snowboarder)...
Brian
08-01-2006, 07:45 PM
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Originally Posted by RSRS
Word is:
Plugged cam spray bar
Plugged cam spray bar
And what about the turbo, was that an oil blockage too, what has got in there to block up your oil delivery?
08-01-2006, 07:55 PM
#84
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I'd agree with the cam/rocker spray bar. That's completely possible. If the engine has been running hot, the way it looks, then potentially the spray bar could get clogged with sludgy oil/other misc material.
How do the cam housings look now (I assume they've been cleaned up in prep for re-install), have you tried shooting brake cleaner in there (the spray bar), or pressurizing the spray bars and watching the kind of spray pattern you get?
Brian
How do the cam housings look now (I assume they've been cleaned up in prep for re-install), have you tried shooting brake cleaner in there (the spray bar), or pressurizing the spray bars and watching the kind of spray pattern you get?
Brian
08-01-2006, 09:13 PM
#85
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If the spray bars blocked up, wouldn't you hear the extra noise from there being no lubrication ?
I had it in my 3.2 carrera and freed the holes with a pin. The noise alerted me that something was wrong and the lobes are still perfect.
Are you sure the valve springs were ok for the lift of that cam (I think you call it coil bind) ?
I had it in my 3.2 carrera and freed the holes with a pin. The noise alerted me that something was wrong and the lobes are still perfect.
Are you sure the valve springs were ok for the lift of that cam (I think you call it coil bind) ?
08-01-2006, 09:59 PM
#86
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Kinda like hearing detonation in a whirring, clicking, igniting..... aka a normally noisy 911 or 930......(usually) just ain't gonna happen ;-)
Couldn't hear the laterally loose rod, either.
Cam is fine - just a 964, about as 'wild' as youcan get in a CIS motor.
Really, it turned out to be a clogged spray bar but thanks for the ideas
Couldn't hear the laterally loose rod, either.
Cam is fine - just a 964, about as 'wild' as youcan get in a CIS motor.
Really, it turned out to be a clogged spray bar but thanks for the ideas
08-01-2006, 10:19 PM
#87
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RSRS: I don't like watching other people suffer, but this thread is like watching from the outside spellbound by the gore. It also makes me wonder what I would find if I tore my engine apart. Good luck with the rest of the build - it looks really good so far. Keep the pics coming.
I have 80K miles now with an increasing number of those under track conditions. I use 100 octane fuel, 3 oil coolers and 0.8 bar boost in hopes I can keep the engine going.
This scares me even more:
OMG!
BKS can you PM a list of the components you used? If it's all top secret, no problem.
I have 80K miles now with an increasing number of those under track conditions. I use 100 octane fuel, 3 oil coolers and 0.8 bar boost in hopes I can keep the engine going.
This scares me even more:
Costs me $22K with the EFI components
BKS can you PM a list of the components you used? If it's all top secret, no problem.
08-01-2006, 10:28 PM
#88
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Jeffrey:
Stick with the 100 octane and the .8 boost and you'll be fine!
Especially with those 3 coolers. Just keep the oil changed. I change mine after every other event, sometimes every event if I go to an event where I get a ton of mileage, say 400 miles or so at an event.
I'll send you the list.
Brian
Stick with the 100 octane and the .8 boost and you'll be fine!
Especially with those 3 coolers. Just keep the oil changed. I change mine after every other event, sometimes every event if I go to an event where I get a ton of mileage, say 400 miles or so at an event.
I'll send you the list.
Brian
08-01-2006, 11:32 PM
#89
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JBH -
Smart move. What more insurance? If I were you, I'd check the AFRs on a dyno, and if needed invest in the IA fuel head. Great advice from Brian, btw.
I try to lay it all on the table.......facts, observations, and a few questions (and a few emotions tossed in for good measure as the gore keeps piling on). I'll ask the shop about the spray bar area - perhaps he saw something - he wasn't in when I stopped by today. Oil had been regularly & fanatically changed (as it should have been), and the entire internals were clean as could be.
One thing is certain, the engine didn't suffer for lack of maintenance.
The SOB just got very, very hot inside, and the rod bearing....well, it is a mystery and we'll accept it for what it is.
Smart move. What more insurance? If I were you, I'd check the AFRs on a dyno, and if needed invest in the IA fuel head. Great advice from Brian, btw.
I try to lay it all on the table.......facts, observations, and a few questions (and a few emotions tossed in for good measure as the gore keeps piling on). I'll ask the shop about the spray bar area - perhaps he saw something - he wasn't in when I stopped by today. Oil had been regularly & fanatically changed (as it should have been), and the entire internals were clean as could be.
One thing is certain, the engine didn't suffer for lack of maintenance.
The SOB just got very, very hot inside, and the rod bearing....well, it is a mystery and we'll accept it for what it is.
08-02-2006, 12:10 AM
#90
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Wow RSRS,
That was really close to inertially welding rotating machinery into a homogeneous lump! I agree with JBH though, its like watching a train wreck, you just can't take your eyes away. You must have the patience of Job. I'm sure when you get it together this time it'll be right. Good luck man.
That was really close to inertially welding rotating machinery into a homogeneous lump! I agree with JBH though, its like watching a train wreck, you just can't take your eyes away. You must have the patience of Job. I'm sure when you get it together this time it'll be right. Good luck man.