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c.ruber
Samba Member
Joined: January 23, 2005
Posts: 634
Location: Mid TN
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 Posted: Thu Sep 18, 2014 4:18 pm Post subject: Rocker goemetry changed.... |
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I changed the thickness of the copper head gaskets and didn't take into account that the rocker geometry may change as well. I went from .060" copper head gaskets to .040" copper head gaskets. My question is can I correct my rocker geometry by adding shims under the rocker stands and still reuse my existing pushrods? I realize this has probably been covered here a bazillion times... Thanks for the advise.
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hsosa1
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Joined: January 17, 2005
Posts: 1897
Location: Fontana
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| Posted: Thu Sep 18, 2014 4:20 pm Post subject: |
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yes u can do that u can also shave down the rocker too if u need to.
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modok
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Joined: October 30, 2009
Posts: 26785
Location: Colorado Springs
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| Posted: Thu Sep 18, 2014 7:55 pm Post subject: |
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| .020 is a small difference. Only enough to matter if your pushrods were bordering on too long before. |
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vwracerdave
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Joined: November 11, 2004
Posts: 15303
Location: Deep in the 405
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| Posted: Thu Sep 18, 2014 8:37 pm Post subject: |
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What cam?
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c.ruber
Samba Member
Joined: January 23, 2005
Posts: 634
Location: Mid TN
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| Posted: Fri Sep 19, 2014 6:01 am Post subject: |
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Dave, I'm running a Web 86b.
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jfats808
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Joined: December 10, 2007
Posts: 5022
Location: oahu hawaii
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| Posted: Fri Sep 19, 2014 8:29 am Post subject: |
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Readjust lash and call it good. If geometry was done right like Modok said earlier, .020 mediation wont hurt nothin.
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c.ruber
Samba Member
Joined: January 23, 2005
Posts: 634
Location: Mid TN
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| Posted: Fri Sep 19, 2014 9:00 am Post subject: |
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Jfats, When I went to just re-adjust the lash, I couldn't because there wasn't enough adjustment at the rocker cup. I added shims under the rocker blocks and was eventually able to get close. I just want peace of mind. I have too much wrapped up in this engine to have a failure of some sort because I cut a corner just to get it back up and running. Thanks for any more info. I'll let you know how much shim I added under the blocks here in a few. BTW I'm also running a set of 1.45:1 rockers. Thanks
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Max Welton
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Joined: May 19, 2003
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jfats808
Samba Member
Joined: December 10, 2007
Posts: 5022
Location: oahu hawaii
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| Posted: Fri Sep 19, 2014 10:47 am Post subject: |
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| c.ruber wrote: |
| Jfats, When I went to just re-adjust the lash, I couldn't because there wasn't enough adjustment at the rocker cup. I added shims under the rocker blocks and was eventually able to get close. I just want peace of mind. I have too much wrapped up in this engine to have a failure of some sort because I cut a corner just to get it back up and running. Thanks for any more info. I'll let you know how much shim I added under the blocks here in a few. BTW I'm also running a set of 1.45:1 rockers. Thanks |
I understand. Worst case is a new set of mantons. But if the shims under the blocks work, get her up and running.
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2276 IDA's 86C 11-1 DD !
2017 48 Trijet DRLA's W125
| Rockstar Suzuki wrote: |
You might as well put 10 year build in your bullshit sig, as it will NEVER run. Also your a dick |
You can always learn something new, even from a fool.
Check your oil levels routinely! |
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c.ruber
Samba Member
Joined: January 23, 2005
Posts: 634
Location: Mid TN
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| Posted: Fri Sep 19, 2014 10:51 am Post subject: |
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I'm confident the geometry was correct before. I did the whole process measuring for half lift with the dial indicator and the adjustable pushrod. I added .075" of shim on each rocker stand (all 4) to get the rockers to a point where I could properly adjust them. At this point I'm not real comfortable with the amount of threads sticking out of the adjusting nut. I've always stuck to the rule of thumb that there should be at least 1 1/2 to 2 threads showing outside of the jam nut.
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kielbasa
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Joined: November 28, 2007
Posts: 1443
Location: Garbage Grove, CA
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| Posted: Fri Sep 19, 2014 11:58 am Post subject: |
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.020 difference and didnt have enough room for adjustment? Gotta fix that, what happens when everything breaks in and starts to set and wear?
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