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08-23-2021, 06:53 PM
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#1 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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Re: Micro Welding of bearing shell to rod housing bore
Glenn I cant find the info on bolts or rods. Bolt stretch is .0055.
I need to finish my engine to race BG this weekend so my response time will be long until we are at BG. Thanks everyone for the help and input. |
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08-24-2021, 12:50 AM
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#2 |
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Senior Member
Join Date: Sep 2006
Location: Fulton County, PA
Posts: 615
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Re: Micro Welding of bearing shell to rod housing bore
Strange.
So there is no indication of an oiling problem? i.e. crank to bearing face contact/damage? Or bearing shell being hammered (detonation)? Any indication of the caps moving on the rod (fretting on the cap/rod contact surface? Fretting/welding indicates parts are moving under load. Initial thought would be to tighten (decrease) the bore size to the minimum to increase the crush. All I got. Will be watching for responses. |
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08-24-2021, 07:37 AM
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#3 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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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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#4 |
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VIP Member
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Location: Northern New Jersey suburbs
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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....
__________________
Rich Biebel S/C 1479 Stock 147R |
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08-24-2021, 11:21 AM
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#5 | |
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Senior Member
Join Date: Sep 2006
Location: Fulton County, PA
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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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#6 | |
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VIP Member
Join Date: Oct 2002
Location: On a hilltop in Pa.
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Re: Micro Welding of bearing shell to rod housing bore
Quote:
__________________
Billy Nees 1188 STK, SS I'm not spending 100K to win 2K |
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08-24-2021, 12:32 PM
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#7 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
Posts: 10,646
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Liked 10,747 Times in 2,235 Posts
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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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