Re: Post mortem on Challenger engine
[Re: CokeBottleKid]
#680792
04/27/10 03:15 AM
04/27/10 03:15 AM
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Joined: Jan 2003
Posts: 2,697 Renton Wa
topfueldart
master
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master
Joined: Jan 2003
Posts: 2,697
Renton Wa
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Quote:
I should re-phrase that, how do you not know you're 3 quarts down, and proceed to make a pass? That's more irresponsible than a teenage kid driving their car 5k miles without so much as checking the oil .
I was gonna make a smartazz comment about it not being hard to keep the oil level high when you don't make any hits in multiple years, but then I remembered Brad took a long break too
11.48 @ 120 with a 1.80 60' 318, stock 1.88 heads, stock 904, Pump Gas, 13 lbs of boost.
9.94 @ 134, 318 on pump gas, 14 lbs w/ Eddies, transbrake 727, 3600 lbs, 3.54 gear and 28's.
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Re: Post mortem on Challenger engine
[Re: Challenger 1]
#680796
04/27/10 05:00 PM
04/27/10 05:00 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
Wondering if the cracked pickup tube could have caused the oil starvation?
Honestly, I don't think it was cracked before I had to on it to get it to come out.
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Re: Post mortem on Challenger engine
[Re: CokeBottleKid]
#680797
04/27/10 05:02 PM
04/27/10 05:02 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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CBK - Isn't it time to update your signature from: "Just me and The Haze now. It waits in darkness... soon, soon " to: "Just me and The Haze now. It waits in darkness... eventually, eventually " ?
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Re: Post mortem on Challenger engine
[Re: BradH]
#680798
04/27/10 08:15 PM
04/27/10 08:15 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Post mortem on Challenger engine
[Re: BradH]
#680799
04/27/10 11:23 PM
04/27/10 11:23 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Another update: Yep, the local HD had a set of those slick internal pipe wrenches. And what was left of the pipe was too thick (or distorted) for any of them to work. So I improvised using something w/ a long taper (a cylinder head stand, believe it or not) that allowed me to wedge it in and managed to get the broken piece out anyway. As easy as that came out, I'm confused why the pickup twisted and snapped off. The best news is the threads in the block still look good. I also mocked up the new Milodon pickup I bought w/ the new pan and it doesn't fully tighten until it's turned 30-40 degrees past where it "should" stop to be level w/ the bottom of the pan. I figure it'll need some sort of sealant on the pickup that will allow me to position it properly, yet not allow for any air leaks around the perimeter of the threaded section. If anyone has any preferences for what to use here, let me know. Also took a better look at the cylinder bores and there's no way I can just put it back together as is w/ a clear conscious. It's definitely going to need to be honed. So much for just slapping a new set of bearings in it and throwing it back in the car.
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Re: Post mortem on Challenger engine
[Re: CokeBottleKid]
#680806
04/28/10 12:08 AM
04/28/10 12:08 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
Sooo still haven't answered why you don't check your oil before making passes .
Here's the deal (and I've stated this before, but it's been months): The car had no history of oil consumption, so I rarely felt the need to check the level for normal street use. It had been less than 1000 miles since the last change and I'd ASSUMED it was fine.
Well, it turned out that a spot weld holding the front baffle in the pan had broken loose and oil was escaping through the pinhole where the weld broke. I didn't clue in to what the slightly lower oil pressure at cruising speed was trying to tell me on the way to the track, and also had a temporary glitch w/ my oil pressure sending unit while in the staging lanes that made me disregard what I believed to be bogus readings after that.
It wasn't until I my second pass that day at the track when I noticed the pressure dropped noticeably on the big end. I checked the level and found it way low, and also saw oil collecting under the engine. At that point I added oil, packed up my stuff, and drove the car home, pulling over periodically to check the level and add oil as necessary.
The amount of time it was running low on oil, including some full-out 1/4 mile passes on the track (it turns about 7000 RPM going through the traps) was all it took to do the damage I've described above.
There's really nothing else I can say on the subject.
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Re: Post mortem on Challenger engine
[Re: M_D]
#680809
04/28/10 09:38 AM
04/28/10 09:38 AM
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Joined: Nov 2003
Posts: 2,131 New Lenox IL
cudadon
top fuel
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top fuel
Joined: Nov 2003
Posts: 2,131
New Lenox IL
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The pickup tube on most big block oil pans is long, and heavy. After twice finding cracked tubes + some of my friends having cracks. I welded a brace from the windage tray to the tube to support it from G forces, oil slosh etc. That worked. I and some of my friends have since gone to static/swinging pick ups in the pan. Nothing quite like taking engine apart and having the pick up break off when HARDLY ANY force was exerted to remove it. Don
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