Searching for an answer
Thread Starter
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Tuned
Joined: Nov 2009
Posts: 250
Likes: 1
From: Austin, Tx.
Searching for an answer
Keeping a long story short...
Lost oil pressure on my sig truck. Removed intake(to remove motor), and found a bent push rod, and displaced lifter. Straightened rod for testing, and found no evidence of binding. Decided to replace them all. Whoa! 2 different lengths available!
Have searched lots of places, found reference to both sizes, but what I can't seem to find an answer to , is
WHY?
Different for intake and exhaust?
To allow for different gasket thickness?
I don't have the tools to properly measure the old ones, so I have no idea what is the appropriate size.
Lost oil pressure on my sig truck. Removed intake(to remove motor), and found a bent push rod, and displaced lifter. Straightened rod for testing, and found no evidence of binding. Decided to replace them all. Whoa! 2 different lengths available!
Have searched lots of places, found reference to both sizes, but what I can't seem to find an answer to , is
WHY?
Different for intake and exhaust?
To allow for different gasket thickness?
I don't have the tools to properly measure the old ones, so I have no idea what is the appropriate size.
Elder User
Joined: Jun 2004
Posts: 800
Likes: 6
From: Edmonton, Alberta Canada
ford changed the deck height of the engines in i think in 71. they went to a taller deck height so this would change the pushrod lenght required. also went to a different rocker arm setup in 72 from the earlier early style engines. the 71 and older engines used a rocker stud and nut on the rocker arm while the 72 and newer use a bolt down style rocker arm.
the only way to make sure which pusrod you require is to take one of the old non-bent ones out and take it in to get measured.
rgds
Mike
the only way to make sure which pusrod you require is to take one of the old non-bent ones out and take it in to get measured.
rgds
Mike
