joseph702
Zone Head
Posts: 598
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posted July 08, 2012 06:48 PM
rod bearing noise?
last year spit shim and blew up cam bucket and so on, so have a guy rebuild it and he pulled one rod bearing cap to see if stuff got in. so had new bolts and recon the rod .
get motor in and running sounded good and ran good .
2 weeks later (today) at track pull 6.0 at 119 (mph still not right) then 6.3 then 6.6 then i heard a what i think is a rod bearing knock shut it down right on track . got home and droped oil filter and pulled plugs every thing lools new and nothing to me looks like a bearing.
so know im sitting here going crazy not knowing. my setup is ss head at 107 107.5 and .030 head gasket 47mm tb .
  
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smokinZX14
Needs a life
Posts: 10197
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posted July 08, 2012 06:59 PM
Having asked cnc about his SS head for jesses bike he told me he sets the cam timing to what ever number gives you safe valve clearence .. I'm pretty sure 107 107 was not the number he used .. 107 107 is not far off from factory 105 105 .. You have a 40 60 angle mill SS head and that puts the valves very very close to the pistons ...I would give a call to Jim at CNC and ask .. I do know you don't want to miss a shift with a SS head package .. More than one SS racer has told me this .. Do a compresson Check and that should tell you ..
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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quick6
Expert Class
Posts: 257
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posted July 09, 2012 07:53 AM
pull the oil pan. if you see copper shavings you have hurt a bearing. if no shavings then the problem is probally in the top end
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2006 zx14, fully dressed and sliding(Charlie Sheen)
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edszx14
Expert Class
Posts: 271
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posted July 09, 2012 08:43 AM
If you are running an SS head, to get the piston to valve clearance Jim recommends, the exhaust cam should be at 108 and the intake will be at 109-110. Mine is at 108 exhaust and 110 intake. I have missed a few gears with it and so far no problems noted.
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Ed
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Big_T112
Pro
Posts: 1061
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posted July 09, 2012 08:44 AM
When you say recon the rod did you mean recondition? If the rod was resized and the builder did not check for a proped clearence then you could have a rod issue. Just me and others may have had good luck but if i have any problems I would replace the rod with a new one. It would have to come out anyway to be fixed. You can pull the filter and cut it open to check for bearing material. The first layer will be silvery grey color then gold. By the MPH slowing down sounds like it turned a bearing and it got tight. Check it before you do anymore damage to be sure. When you pull the pan also look for a discolered rod.
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Shane661
Needs a life
Posts: 11494
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posted July 09, 2012 12:54 PM
Yeah, I would pull the oil pan and look for any shavings, and any signs of heat on the rods. You can see a whole lot once the pan is off.
Shane
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joseph702
Zone Head
Posts: 598
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posted July 09, 2012 04:32 PM
got pan off every thing looks like new. i think lee is right i think it taped a valve. gana drop motor this week and find out
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1badzx12r
Needs a life
Posts: 8321
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posted July 09, 2012 04:36 PM
quote:
got pan off every thing looks like new. i think lee is right i think it taped a valve. gana drop motor this week and find out
or spit a shim .. it sounds like shit when it does
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http://www.youtube.com/watch?v=S06nIz4scvI
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joseph702
Zone Head
Posts: 598
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posted July 09, 2012 04:55 PM
like it dont sound bac at idel at all but rev it some and u hear it and studers a lil . under load u hear it alot more.
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