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11-04-2008, 07:59 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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Not Ranked
Not sure I can answer all of that but here goes...The engine builder is warrantying this...very, very upset andd fells bad. I don't want to drop names as things like this can go wrong and possibly not a reflection on him or his work, so far he is taking care of it...I am only out an hour and half of my time pulling the engine out...no problem...and I learn alot
Yes he is tearing down the engine today, so I will fimd out about the adjacent rod and the others
It was cap #3 oil hoiles have been chamfered etc, eased etc. not sure which oil pump was used...but had 60 pounds at start up.
Oil pressure never bottomed...but I never again had 60...now 50 at startup and 40 when warm. The bearing never turned or spun around...but came out of the cap and was all worn...copper in oil and filter after I cut it open
The knocking became more pernounced when the engine was warm...I think maybe the piston hitting the head....was the light knock...will see today when torn down.
Rod bolts were torqued to 50 pounds...sure seems like that when taking off the cap...but .....I'm no expert, I can't answer about the crank pin
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11-04-2008, 08:34 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
What was the stamped size on the back of the bearing? Did it match the others?
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11-04-2008, 08:35 AM
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CC Member
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Join Date: Mar 2004
Location: miami,
FL
Cobra Make, Engine: E-M Cobra Ford FE 427 w/ Webers 48 IDA
Posts: 1,383
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Not Ranked
Here's my .02
I would replace the rod bolts and recondition the rods. Also, would clean out the motor and and all oil passages in the motor and head and any nocks and crannies.
If your running a oil cooler clean that out as well.
Things happen!!!!!
It could have been contamination, clearances, or torque pressure.
I am sure this time around you will have better success. Retorque your bolts 3 times and dont take anything for granted.
Even the best of us make mistakes. At least your engine builder owned the problem. |
11-04-2008, 08:54 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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all tolerances were at .002 or 2 thousandths both the mains and the rods
John
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11-04-2008, 08:58 AM
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CC Member
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Join Date: Mar 2004
Location: miami,
FL
Cobra Make, Engine: E-M Cobra Ford FE 427 w/ Webers 48 IDA
Posts: 1,383
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Not Ranked
If you did not see any bluing, I would say your clearances are fine.
I would check the crank clean inside crank if it serviceable.
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11-04-2008, 09:31 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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The crank was brand new..a scat cast crank. that journal will be polished.,..but no marks or scratches...or by feel. Obviously a better inspection once its tore down
The engine ran for all of 45 minutes to maybe 60 minutes top
We did not open the second cap on the same journal...thats happening today
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11-04-2008, 09:38 AM
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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
Just an outside chance but with the 69 block which has a marginally shorter deck height I think there is a specific piston pin height for that engine which is different from the later 351's, check into it. Outside of a twisted rod, be sure the rod cap is installed in the correct orientation and the rod fasteners are retaining their clamping force and have not been overstressed and most importantly that the finished bore of the rod is correct, it must create "Crush" on the bearing shell to keep it captive.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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11-04-2008, 09:50 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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Not Ranked
A question now about the rod bolts...we have already ordered new eagle connecting rods, why take chances as the last set of stock rods were reconditioned.
We did use the old ARP rod bolts as the engine has only 3800 miles. Whats everyones thought that when the first bearing spun...it maybe streached or tweaked those 2 bolts??
is it common to reuse the old bolts when so few miles are on the engine?
John
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11-04-2008, 09:54 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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DA...I was just thinking....the rod bolts are studs, and the new rods will come with them
John
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11-04-2008, 10:01 AM
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CC Member
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Join Date: May 2000
Location: Northern VA,
VA
Cobra Make, Engine: Classic Roadsters
Posts: 2,765
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If it is a new aftermarket crank, maybe it is not drilled thru from the main to the rod journal. or maybe there is crud in there.
.
__________________
LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
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Utinam logica falsa tuam philosophiam totam suffodiant!
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11-04-2008, 10:12 AM
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CC Member
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Join Date: Jul 2000
Location: Cleveland, Ohio,
Posts: 91
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Yes it was a new SCAT crank.....I hoped he would of checked that
thanks
John
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11-04-2008, 10:27 AM
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CC Member
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Join Date: Oct 2008
Cobra Make, Engine:
Posts: 95
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JohnM,
If you get them, pictures please.
f
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