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08-24-2021, 07:37 AM
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#21 |
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Live Reporter
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Re: Micro Welding of bearing shell to rod housing bore
The caps have dowels and the mating surface looks perfect. The upper shell is always not as tight as the cap shell in its bore.
Is there a certain finish that the bore needs to “hold” the bearings? |
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08-24-2021, 08:18 AM
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#22 |
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Re: Micro Welding of bearing shell to rod housing bore
I've been reading this thread and wondered why no one mentioned detonation as being a possible issue.
It can show up in rod bearings.... Usually the shells just fall out....and might have some odd looking wear marks....
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Rich Biebel S/C 1479 Stock 147R |
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08-24-2021, 11:21 AM
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#23 | |
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Senior Member
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Re: Micro Welding of bearing shell to rod housing bore
Quote:
Fly poop on spark plugs? Fuel change? Verify timing and TDC marks? Try another known good timing light? Just reaching here. |
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08-24-2021, 11:29 AM
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#24 | |
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Re: Micro Welding of bearing shell to rod housing bore
Quote:
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Billy Nees 1188 STK, SS I'm OK..........it's everybody else. |
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08-24-2021, 12:32 PM
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#25 |
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Re: Micro Welding of bearing shell to rod housing bore
First noticed it when we started getting close to the 590 hp number. Damper is on TDC, fuel seems to make no difference c11, c12, c10, renegade 116. cam changed made no difference.
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08-24-2021, 02:00 PM
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#26 |
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Re: Micro Welding of bearing shell to rod housing bore
If the engine is apart and obviously it is....
Look at the ring lands and the tops of the pistons for any oddball signs that usually indicate detonation. Pecker tracks on pistons, or on the sides of the pistons above the rings. Ring lands beat up.... If all is clean then you can rule it out.... It's not likely but I thought I'd throw it out there.
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Rich Biebel S/C 1479 Stock 147R |
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08-24-2021, 02:08 PM
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#27 |
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Re: Micro Welding of bearing shell to rod housing bore
Just thinking out of the box, how old is the Harmonic Balancer?
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08-24-2021, 08:05 PM
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#28 |
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Live Reporter
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Re: Micro Welding of bearing shell to rod housing bore
At least 6 to 8 years old. Last time it was down I had crank checked for balance it was ok
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08-25-2021, 08:38 AM
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#29 |
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Re: Micro Welding of bearing shell to rod housing bore
What brand of balancer are you using?
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Ray Bassett I/SA 1687, SS/DA 1687 "SuperPro is both", unknown |
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08-25-2021, 09:46 AM
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#30 |
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Member
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Re: Micro Welding of bearing shell to rod housing bore
A good read on honing the big end of steel rods is in the SA Design Jenkins small block Chevy book I’d how he puts .002 shim stock the hens the rods round then removes it. The rod is now out of round but high rpm it stretch’s back round as I remember it’s when the rod does not have enough material at the parting line.
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