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04-30-2013, 09:46 PM
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CC Member
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Join Date: Dec 2012
Location: Edmond,
OK
Cobra Make, Engine: BDR#312
Posts: 9
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Not Ranked
Piece of metal found on oil drain plug
Found this piece of metal (assume its steel) stuck to oil drain plug magnet. Drained the oil just after engine started making a continuous metallic knocking. Idles fine, noise definitely gets worse with rpm increase.
Can anyone ID what this might be a piece of? I'm thinking either distributor or cam gear. I will probably pull distributor and oil pan off tomorrow to have a look see.
Dart 351w block, MSD Pro Billet 8578 dizzy, Trick Flow stage 3 cam, Edelbrock Victor jr heads, not sure about rockers.
Mark
Last edited by Mtgauvin; 05-02-2013 at 08:03 PM..
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04-30-2013, 09:54 PM
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Senior Club Cobra Member
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Join Date: Nov 2003
Location: Parker County,
Tx
Cobra Make, Engine: LoneStar LS427 , 427 Windsor
Posts: 381
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Not Ranked
Is that piece straight or curved?
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Jim
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A Gnat! Quick, get a sledgehammer!
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05-01-2013, 09:51 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Generally, if there is a chunk, it is a good idea to disassemble the engine and findout what 'other' things have been effected by it rattling around. Also see if there are 'other' parts ready to fail, failing or have failed.
Too thin and long to be distributor gear.
Just my opinion.
Tru
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I'm a writer, feed the artist and buy a book.
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05-01-2013, 10:10 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
I have been looking at that piece for 5 mins and I can't place it's origin. Not from distributor, not from oil pump, not from timing chain or cam gear.
Wondering if it could have cam from a piece of cast webbing inside the block? I think a disassembly is in your very near future.....the sooner the cheaper?
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Sunshine, Asphalt and no stop signs...Perfect
"Let's roll"
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from CD "Long Road Out of Eden"
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05-01-2013, 10:55 AM
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Senior Club Cobra Member
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Join Date: Jan 1999
Location: MARKSVILLE,LA.,,
Posts: 3,235
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Quote:
Originally Posted by Clois Harlan
I have been looking at that piece for 5 mins and I can't place it's origin. Not from distributor, not from oil pump, not from timing chain or cam gear.
Wondering if it could have cam from a piece of cast webbing inside the block? I think a disassembly is in your very near future.....the sooner the cheaper? |
I'm with you on this one Clois, looks like a piece of "cast webbing" from inside the block.........definitely need to do an tear down at this point......
David
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DAVID GAGNARD
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05-01-2013, 11:01 AM
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CC Member
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
Posts: 2,703
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it has a machined surface on part of it......could be nothing...but could be everything.
i'd pull the pan first and look around. could be the bottom off one of the bores, kinda thin there, its stroked could be from clearancing for the crank.
in any event it can't be just ignored..
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Fred B
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05-01-2013, 11:10 AM
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CC Member
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Join Date: Jun 2011
Location: hatfield,
ma
Cobra Make, Engine: backdraft racing #470 427sb
Posts: 74
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I can't see how curved it is, looks like piston where the rings would sit explaining your knocking noise or the top of a lifter. Hard to say your there...
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05-01-2013, 03:38 PM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
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dogbone
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05-01-2013, 04:31 PM
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
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chickenbone...... 
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Fred B
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05-01-2013, 07:34 PM
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CC Member
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Join Date: May 2012
Location: Poway,
CA
Cobra Make, Engine: Shelby American, 1965 427 FE, alloy MR heads, Sidewinder intake
Posts: 112
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"...continuous metallic knocking." That can't be good and can only get worse. I'd pull the pan, as you suggested. If you do not get to the source of the problem, don't give up. Pull the valve covers and start methodically removing valve train gear to inspect the lifters, springs, everything.
The piece is a real mystery. Do you have roller lifters? It might be one of the retainers that (otherwise) keep the lifters from rotating within the lifter bore. This kind of thing has happened to the best of us. Good luck!
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Mike
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05-01-2013, 08:06 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Is it Aluminum or Ferrous metal?
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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05-01-2013, 08:46 PM
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CC Member
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Join Date: Jul 2005
Location: Bartlett,
Ill
Cobra Make, Engine: Everett-Morrison LS1
Posts: 2,448
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stuck to the magnetic drain plug means its iron
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05-01-2013, 10:06 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Brain Fart on my part.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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05-02-2013, 03:49 AM
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CC Member
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Join Date: Jun 2011
Location: hatfield,
ma
Cobra Make, Engine: backdraft racing #470 427sb
Posts: 74
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Any way to post the picture bigger or more of them without your fingers?
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05-02-2013, 04:37 AM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
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dogbone--holds the lifters down/in, in the valley, under the spider.
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05-02-2013, 06:04 AM
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Seasoned Member
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Join Date: Apr 1999
Location: Portsmouth,
VA
Cobra Make, Engine: Unique 427 S/C, Dart 427W "Replica" Ford engine
Posts: 584
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Not Ranked
Mark;
I have the same block as you do and I built it up myself. If I found that chunk in my oil pan I would un-build it before I tried to run it again. The piece doesn't look familiar but if it's knocking it can't be good.
Bill |
05-02-2013, 09:06 AM
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CC Member
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Join Date: Mar 1999
Location: Redding,
CA
Cobra Make, Engine: Cobra Maker
Posts: 722
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distributor Pan valve-covers intake in that order
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Bill Emerson
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05-02-2013, 11:57 AM
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CC Member
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Join Date: Feb 2002
Location: Pearland, Texas,
Posts: 60
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I agree with Vector. Remove your intake.
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05-02-2013, 01:57 PM
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CC Member
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Join Date: Feb 2006
Location: Gore. New Zealand.,
SI
Cobra Make, Engine: DIY Coupe, F/T ,MkIV.
Posts: 808
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Looks mighty like a piece of dog bone(roller lifter link), if thats the case it would explain the noise your hearing, roller lifters are quite likely to be doing a bit of a dance & chewing bits off the cam lobes, inlet manifold first to decide on how much further you need to go...
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Jac Mac
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05-02-2013, 08:06 PM
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CC Member
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Join Date: Dec 2012
Location: Edmond,
OK
Cobra Make, Engine: BDR#312
Posts: 9
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And the winner is.....Vector1....
Tore engine down today...it was a dogbone that had one of the ends broken off, which of course caused the roller lifter to rotate enough to stop rolling and flat spot...arrrr...which means new cam, roller lifter and retainer "dogbone"! Got to love engine builders who modify things that shouldn't be modified...note...do NOT machine down dogbones to fit them into the space around the roller lifter on a Dart 351w block, or at least make sure you don't take it so far as to weaken the tempered metal or so thin your grandma could break it with her rocker!!! I replaced the original pic with a pic of the 'culprit'...
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