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RE: You need shop manual
By McQ - 03/14/2005 12:51:28 AM; IP 4.242.60.148
The reason someone installed the adjustable rockers might be that the hydraulic lifters installed at the time the cam was installed may have been anti pump-up. These generally required the adjustable rockers. It's also possible that the builder/owner wanted the advantage of the 1.76 adj. rockers ratio over the non adjustable.

Adjusting the rockers with hydraulic lifters is fairly easy/straight-forward. Just make sure that you're adjusting a rocker where the cam lobe for that valve is on the base or fully closed. Heres' a technique I learned years ago that doesn't require a shop manual:

Start with #1, turn the 428 over by hand or with remote starter while watching the first valve, which is exhaust. Just as this valve starts to open(when the valve-spring starts to compress), the intake valve will be on the base circle of that lobe. It's time to adjust the intake valve rocker. Now all you have to do is tighten down the adjuster of that intake valve rocker until you've taken up the slack. Just turn the pushrod with your hand as you tighten down the rocker adjuster. Just as the pushrod tightens, stops spinning easily by hand...Stop! Now set your wrench(I use a 3/8" drive socket wrench) at something like high noon and give the adjuster a half a turn, like from noon to half past - 12:30. Make sense? With hydraulics, it's very easy. Just don't over tighten.

Now for that exhaust valve, turn the CJ over until that #1 intake valve just starts to open, when then intake valve spring just starts to compress. Now that exhaust valve is on the base of the exhaust lobe and it's ready for the same adjustment you just did to the intake valve rocker. Just go right down the right bank there, 1-4, jump over to 5-8, doing the same thing and that should do it.

Again, it's simple, just don't go too tight. Once the slack is taken up, a half a wrench turn should do it.

This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=24272&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24272" onclick="return false;">cj heads</a>&nbsp;-- <font color=#0000ff>tommy walton, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24272', contentMargin: 60, icon: $('anchor24272') }); </script>  cj heads -- tommy walton, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24276&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24276" onclick="return false;">RE: cj heads</a>&nbsp;-- <font color=#0000ff>Jack W, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24276', contentMargin: 60, icon: $('anchor24276') }); </script>  RE: cj heads -- Jack W, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24277&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24277" onclick="return false;">RE: cj heads</a>&nbsp;-- <font color=#0000ff>tommy walton, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24277', contentMargin: 60, icon: $('anchor24277') }); </script>  RE: cj heads -- tommy walton, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24278&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24278" onclick="return false;">RE: cj heads</a>&nbsp;-- <font color=#0000ff>Jack W, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24278', contentMargin: 60, icon: $('anchor24278') }); </script>  RE: cj heads -- Jack W, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24280&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24280" onclick="return false;">RE: cj heads</a>&nbsp;-- <font color=#0000ff>tommy walton, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24280', contentMargin: 60, icon: $('anchor24280') }); </script>  RE: cj heads -- tommy walton, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24281&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24281" onclick="return false;">You need shop manual</a>&nbsp;-- <font color=#0000ff>Jack W, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24281', contentMargin: 60, icon: $('anchor24281') }); </script>  You need shop manual -- Jack W, 03/13/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24282&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24282" onclick="return false;">RE: You need shop manual</a>&nbsp;-- <font color=#0000ff>tommy walton, <i>03/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24282', contentMargin: 60, icon: $('anchor24282') }); </script>  RE: You need shop manual -- tommy walton, 03/13/2005
Collapse <b>RE: You need shop manual</b>&nbsp;-- <font color=#0000ff>McQ, <i>03/14/2005</i></font>RE: You need shop manual -- McQ, 03/14/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24284&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24284" onclick="return false;">RE:'66 390GT heads...</a>&nbsp;-- <font color=#0000ff>McQ, <i>03/14/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24284', contentMargin: 60, icon: $('anchor24284') }); </script>  RE:'66 390GT heads... -- McQ, 03/14/2005
Collapse <a href=../ForumFE/reply.aspx?ID=24285&Reply=24272><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24285" onclick="return false;">RE:E-brock Perf./CJ heads</a>&nbsp;-- <font color=#0000ff>McQ, <i>03/14/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24285', contentMargin: 60, icon: $('anchor24285') }); </script>  RE:E-brock Perf./CJ heads -- McQ, 03/14/2005
 NO R&R Fe cast intakes -- Jack W, 03/14/2005
 RE:'66 390GT heads... -- Jack W, 03/14/2005
 RE: You need shop manual -- tommy walton, 03/14/2005
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