Bearing experts??
#2722367
12/07/19 06:27 PM
12/07/19 06:27 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
HOTMOPR
OP
mopar
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OP
mopar
Joined: May 2011
Posts: 625
Oakville, Wa
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Any ideas what's going on here? Front to back. Lefty to right.. This is out of my 500" turbo motor . Stock 440 block stock caps. The mains look good except the thrust bearing. The thrust faces look pretty much untouched. The rear 4 rod bearings damage I would say probably from the junk that got pumped through it at the end. Just some scratching.
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: HOTMOPR]
#2722369
12/07/19 06:32 PM
12/07/19 06:32 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
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Not sure how many passes it has but it hasn't been apart some 2011. Been running 12-16ish psi
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: HOTMOPR]
#2722373
12/07/19 06:39 PM
12/07/19 06:39 PM
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Joined: Aug 2003
Posts: 43,237 Bend,OR USA
Cab_Burge
I Win
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I Win
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Bend,OR USA
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I would check the crank for run out to see on the all the main bearing surfaces to see if it is bent or not I don't like to see any run out at all on any of the mains EDITED, look real closely for cracks in the main webbing between the bottom of the block cylinder walls down into the main webbing also I'm not trying to alarm you but better to find it, any problems, now instead of running over the crankshaft later
Last edited by Cab_Burge; 12/07/19 06:43 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Bearing experts??
[Re: Cab_Burge]
#2722379
12/07/19 06:49 PM
12/07/19 06:49 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
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Ok thanks Cab. This motors race days are done. I am building a new short block for the race car. This 500 will be going in my 63 for street duty. unless the block is cracked.. lol. Ill pull the crank and get it checked too
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: Twostick]
#2722452
12/08/19 01:27 AM
12/08/19 01:27 AM
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Joined: May 2011
Posts: 625 Oakville, Wa
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ya there was a ton of build up around the dowel. Luckily it didt spin. Crank still looks great! Or great enough for me .. lol
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: HOTMOPR]
#2722579
12/08/19 04:43 PM
12/08/19 04:43 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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My best guess is you are starving it for oil on the launch. Middle sump pan? Oil climbs to the rear of the engine and splash oils the rear half of the rotating assy. Are you logging oil pressure?
"use it 'till it breaks, replace as needed"
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Re: Bearing experts??
[Re: TRENDZ]
#2722581
12/08/19 04:54 PM
12/08/19 04:54 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
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Yes center sump road race pan. Running 8 quarts. All the baffles are cut out. Has a single line Milodon pickup. Logs show 70-75 psi whole run.
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: TRENDZ]
#2722652
12/08/19 09:35 PM
12/08/19 09:35 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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master
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Posts: 2,540
Milwaukee WI
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Why is it apart? Were there symptoms? Im surprised the logs never showed a change.
"use it 'till it breaks, replace as needed"
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Re: Bearing experts??
[Re: TRENDZ]
#2722658
12/08/19 10:15 PM
12/08/19 10:15 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
HOTMOPR
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Building a new short block. I was checking bearings after the beating this block has taken. This combo has been 138-140 mph in the 1/8th mile at 3550 pounds so it been making some power I was expecting main bearing damage but not much rod bearing issues. Was planning to throw a different cam and heads on it and roll some new bearing in it. Then run it in my street car.
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: HOTMOPR]
#2722659
12/08/19 10:20 PM
12/08/19 10:20 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
HOTMOPR
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mopar
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I did notice some light bearing material in my K&P when I was creeping up on 18 psi. So I turned it down for the last race. Assuming it was main bearing material. That's the main reason I pulled caps. As for logs there was zero change in oil pressures throughout the year.
Last edited by HOTMOPR; 12/08/19 10:21 PM.
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Bearing experts??
[Re: HOTMOPR]
#2722872
12/10/19 04:18 AM
12/10/19 04:18 AM
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Joined: Aug 2003
Posts: 43,237 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,237
Bend,OR USA
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I think the #3 main bearing trash mostly went into #4 rod and some of that material may have been caught a tiny bit by #3 rod I'm really surprised that none of the main bearing trash from the center main bearings wasn't wash into #5 rod bearing also Did the motor have at least .0040 or more thrust clearances new? Was #3 main bearing straight with no taper front to rear on the clearances? I've seen between .0002 to .0004 taper on some of the new main bearings with block that had been align honed with new main caps and studs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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