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| Valve not staying lashed http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=6801 |
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| Author: | brglass [ Tue Dec 29, 2009 9:02 am ] |
| Post subject: | Valve not staying lashed |
I have a 35 GTR with decked heads, GT cam, mikuni, and MPE and the exhaust valve on #1 head will not stay lashed. 1 hr of ride time and it will ping and the tappet will slap obnoxiously. I have tightened the nut as tight as i can get it. Any ideas what could be causing it? or suggestions to fix it? |
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| Author: | coondik [ Tue Dec 29, 2009 9:11 am ] |
| Post subject: | Re: Valve not staying lashed |
check your rocker bolt for tightness cam may be bad |
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| Author: | brglass [ Tue Dec 29, 2009 9:45 am ] |
| Post subject: | Re: Valve not staying lashed |
Thanks coondik, i replaced rocker, stud, set screw and nut thinking it was a bad rocker/set screw. Stud has remained tight. GT recommended loctite on the set screw and nut so i guess i'll try that. im hoping its not the cam... |
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| Author: | coondik [ Tue Dec 29, 2009 11:00 am ] |
| Post subject: | Re: Valve not staying lashed |
swap that rocker, bolt, adjustment stud, nut, & push rod with the one right next to it. that will help u isolate the problem. if the problem still occurs it may be that lobe on the cam. make shure your settin' @ 1/4 past TDC. may wanna check the valve as well. could be a bent stem or bad guide that's causing it to stick & not fully close! |
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| Author: | Brinkleydog [ Sun Jan 03, 2010 10:18 am ] |
| Post subject: | Re: Valve not staying lashed |
what did u find out? |
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