Zero Lash/ Silent Lash Rockers
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Joined: Mar 2003
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From: Canyon Lake Texas
Zero Lash/ Silent Lash Rockers
Help! I was led to believe my 63 F100, 223 had zero lash (Ford's Silent Lash Rocker Arms) rockers, but now I see also listed for 63 223 engine the "adjustable" type. I bought a complete rebuilt rocker assembly on eBay, but now must specify adjustable or zero lash. Do all 1963 223 truck engines use Zero Lash? Are the assemblies interchangeable? The "Factory" Shop Manual I purchased (1961, with 62-63 supplement) does not mention Silent or Zero lash, and goes about instructing regular "go-no go" feeler gauge type adjustments. I have to tell my seller which to send me when I mail him his Money Order in the morning. Help!!
Tuned
Joined: Jul 2001
Posts: 430
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From: Deatsville, AL
Zero Lash/ Silent Lash Rockers
As I recall the silent lash rockers arms were only on the later engines, the 144-170-200-250s and perhaps the 240-300s.
The few 223 I worked on all had standard adjustable rocker arms.
The few 223 I worked on all had standard adjustable rocker arms.
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Joined: Apr 2001
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I have a book that i bought years ago, that has about a half page on how to adjust the silent lash rocker arm. Looks like the best way to tell what type you have is to look at the rocker arm, where it hits the stem of the valve. The silent lash has a rocker/eccentric that contacks the valve stem. The book list them as 1962-1963 223 cu. in. six. I have only seen them on a car engine, But I will not say they were not used on the trucks.
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