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351w Valve Adjustment

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NickMorton View Drop Down
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    Posted: 20-November-2020 at 3:17AM
Hi All,
 
Having been used to working on British engines mainly 4 cylinder petrol's it was really easy to set the valve adjustment using the rule of 9 eg. valve 2 closed adjust valve 7 /valve 7 closed adjust valve 3 working in a set sequence from the shop manual and all that was needed was appropriate spanner / feeler gauge / flat head screwdriver. Now I have a 73 351w is there an easy guide to adjusting the valves on them as I have a couple that are just starting to tap slightly ?
 
Valve adjust sequence
Gap ?
adjustment method
NCMTORINO1973
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 72 RS 351 Quote  Post ReplyReply Direct Link To This Post Posted: 20-November-2020 at 5:07AM
Hi Nick, have you seen the valve rockers on that 351W yet? If it is stock, then they should be non adjustable bolt down rockers. Many high performance Ford engines in the 60's had adjustable rockers, but very early in the 70's that stopped. Around 1972 you should rarely ever find an OEM Ford engine that doesn't have bolt down rockers.

If that has aftermarket stud rockers(some form of roller), those you can set just like what you learned, except the preload for hydraulic lifters is typically .030-.040" down. Solid lifters would be what you are likely used to in European engines, a simple gap adjustment like .012" I'd throw out.

If the pushrod will compress downward(push it down gently), then the lifters are hydraulic and have to have a preload(valve closed there should be no clearance(negative clearance of say .035")).

So check to see what valvetrain type that 351W has first.
Don
73 Ranchero Sport "72 front end", floor shift/console, planning EFI 7000rpm 351-4V &4R70W
73 Ranchero GT 351C-4V 3.70 gears for sale later.
92 Lincoln Mark VII SE, OBDII 347/4R70W
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