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29 standard 8 valve setting cold and compression
#1
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29tons
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I saw in the packard manual the valve setting should be done hot but with the exhaust manifold there its hard to work on. I was wondering what should the setting be cold. also what is exceptable compression for the engine. thanks for any help

Posted on: 2011/6/12 12:12
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Re: 29 standard 8 valve setting cold and compression
#2
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Owen_Dyneto
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Just off the top of my head, the compression, all plugs removed, choke and throttle wide open, after 3 compression strokes should probably be about 85 psi.

I know it's more than a bit of a pain, but for best results I'd suggest trying to adjust the valves hot and running. I never look forward to it but have managed it a number of times. If not, there are some classic "rules of thumb" for correcting valve clearances when doing them cold, but if you go that route, don't forget to factor into the rule of thumb that you have considerably longer valve stems than typical flathead engines that don't employ the roller cam followers.

EDIT - Compression specs for 6th-7th series Eights are 84-87 psi.

Posted on: 2011/6/12 12:49
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Re: 29 standard 8 valve setting cold and compression
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32model901
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29tons,

IMHO hot adjustment is the best method.

An easier way is not to try doing this with the engine hot and running, but with the engine hot and stopped.

The attachment is a procedure I ran across.

Regards,

Dave

Attach file:


pdf Size: 96.50 KB; Hits: 33

Posted on: 2011/6/12 17:32
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