valve adjustment
Jul 19, 2011 | 07:46 PM
Thread Starter
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Freshman User
Joined: Jul 2011
Posts: 36
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From: Napa CA.
valve adjustment
I have a 76 f-750 with a 391, are the valves adjustable, you can hear the valves clattering the truck has been sitting for 5 years.
Jul 19, 2011 | 07:52 PM
Joined: Jan 2004
Posts: 26,007
Likes: 573
From: Brentwood,CA
If it has adjustable rockers then yes you can adjust the preload! If not its more complex and involves different length pushrods. Is it sludged up inside the engine????
Jul 19, 2011 | 07:54 PM
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Freshman User
Joined: Jul 2011
Posts: 36
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From: Napa CA.
I don't know if it is sludged up In there, the engine seems fairly basic
Jul 19, 2011 | 09:11 PM
Joined: Sep 2003
Posts: 2,110
Likes: 32
From: southwest pa
im looking into adjustable pushrods. not gona spend 400$ on adjustable rockers and dont wana pay the labor to map out custom pushrods.
Jul 19, 2011 | 11:11 PM
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
Does your 391 have hydraulic lifters or solid? If they're hydraulic, pop off the valve covers and tighten them 1/4 to 3/8 of a turn past zero lash.
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