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Conflicting data on solid lifter valve lash adjust
By P - 03/13/2003 11:13:32 AM; IP 216.80.152.48
Hi guys,

I'm looking at a new acquisition this morning, its a 352, 390 and 427 Interceptor Marine Owners Manual, and it's got some interesting info. Inerceptor was the "Crusader" of the day, offering Ford big block marine engines to anyone who wanted one. You could get many different boats with a power option, and Interceptor was one of those options.

For one, it shows the 352 was used as a marine engine, with 8.7:1 compression and 240 horsepower.

The 390 was offered with 9.6:1 compression and 280 horsepower.

The 427 was offered with 8.9:1 and the "usual" 300 horsepower rating we've seen frequently in marine motors.

All three engines were solid lifter versions, with hot valve lash settings .024" for the 352 and 390, but a surprizing .030 for the 427.


Now I'm looking at my Chris Craft operators manual for the 427 marine engine. It shows the same power rating at 300, the same 8.9:1 compression ratio, but the valve lash on the Chris Craft spec is between .020 and .022.

The Interceptor and Chris Craft motors appear to be the same. It may have been Fords "generic" marine offering.

The Interceptor manual says " Improperly adjusted valves can cause a rough idle or excess lifter noise. Excess lifter noise can usually be traced to loose valve, and rough idle to tight valves".

FINALLY ! My question to you guys is this. "With seemingly identical engines why is the valve tappet setting so different?

regards, P
(time to crawl back under my rock, all this exposure is frightening)
This thread, so far...
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Collapse <b>Conflicting data on solid lifter valve lash adjust</b>&nbsp;-- <font color=#0000ff>P, <i>03/13/2003</i></font>Conflicting data on solid lifter valve lash adjust -- P, 03/13/2003
Collapse <a href=../ForumFE/reply.aspx?ID=16504&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor16504" onclick="return false;">Is one spec for hot lash and the other cold? N/M</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>03/13/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=16504', contentMargin: 60, icon: $('anchor16504') }); </script>  Is one spec for hot lash and the other cold? N/M -- Royce Peterson, 03/13/2003
 No, both are specifically listed as "hot" -- P, 03/13/2003
Collapse <a href=../ForumFE/reply.aspx?ID=16506&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor16506" onclick="return false;">All Ford 6 and V-8 engines were Interceptors.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/13/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=16506', contentMargin: 60, icon: $('anchor16506') }); </script>  All Ford 6 and V-8 engines were Interceptors. -- Dave Shoe, 03/13/2003
Collapse <a href=../ForumFE/reply.aspx?ID=16510&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor16510" onclick="return false;">Wonder why Interceptor had a different tappet set?</a>&nbsp;-- <font color=#0000ff>P, <i>03/13/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=16510', contentMargin: 60, icon: $('anchor16510') }); </script>  Wonder why Interceptor had a different tappet set? -- P, 03/13/2003
 RE: Wonder why Interceptor had a different tappet set? -- Bob Sprowl, 03/13/2003
Collapse <a href=../ForumFE/reply.aspx?ID=21232&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21232" onclick="return false;">RE: All Ford 6 and V-8 engines were Interceptors.</a>&nbsp;-- <font color=#0000ff>mike barnhart, <i>04/30/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21232', contentMargin: 60, icon: $('anchor21232') }); </script>  RE: All Ford 6 and V-8 engines were Interceptors. -- mike barnhart, 04/30/2004
 I only know about the old stuff. -- Dave Shoe, 05/01/2004
Collapse <a href=../ForumFE/reply.aspx?ID=16512&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor16512" onclick="return false;">You've got the owners manual, I the service manual</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/14/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=16512', contentMargin: 60, icon: $('anchor16512') }); </script>  You've got the owners manual, I the service manual -- Dave Shoe, 03/14/2003
Collapse <a href=../ForumFE/reply.aspx?ID=16515&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor16515" onclick="return false;">RE: You've got the owners manual, I the service manual</a>&nbsp;-- <font color=#0000ff>P, <i>03/14/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=16515', contentMargin: 60, icon: $('anchor16515') }); </script>  RE: You've got the owners manual, I the service manual -- P, 03/14/2003
 RE: You've got the owners manual, I the service manual -- Mark, 11/09/2004
 RE: Conflicting data on solid lifter valve lash adjust -- John, 05/03/2004
 RE: Conflicting data on solid lifter valve lash adjust -- giacamo, 11/11/2004
 Ford 390/285HP Interceptor Manual Needed -- Steve B, 11/11/2004
 RE: Conflicting data on solid lifter valve lash adjust -- John, 11/12/2004
Collapse <a href=../ForumFE/reply.aspx?ID=23365&Reply=16503><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor23365" onclick="return false;">piston ring end gap</a>&nbsp;-- <font color=#0000ff>kirk, <i>11/26/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=23365', contentMargin: 60, icon: $('anchor23365') }); </script>  piston ring end gap -- kirk, 11/26/2004
 RE: piston ring end gap -- giacamo, 11/29/2004
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