bent pushrods
bent pushrods
Super Moderator
Joined: Apr 2004
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What was happening with the engine before you tore it down? High RPM? Sitting a long time? Recent head work? Mysterious loss of coolant? Poor running?
Could be anything. Maybe the neighbor pulled them and bent them for you while you were asleep.
Could be anything. Maybe the neighbor pulled them and bent them for you while you were asleep.
FTE Leadership Emeritus
Joined: May 2004
Posts: 18,787
Likes: 30
From: Melbourne, Aus
You didn't say what kind of vehicle?
Is it a 7.3l F-Series?
They are known to do it if you let the vehicle sit for some time, and a sticky film gets created on the valve guide, and the valve stops moving, and well...
Is it a 7.3l F-Series?
They are known to do it if you let the vehicle sit for some time, and a sticky film gets created on the valve guide, and the valve stops moving, and well...
Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
With the push rods on the driver side, sounds like a combination of inadequate oil to the shaft assembly and/or excessive wear on the rockers and shaft, resulting in seizure. Better pull the shaft and rockers and take a look. What is the oil pressure running at? How old is the timing chain? It could have jumped a tooth.
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Joined: Sep 2004
Posts: 323
Likes: 3
From: m571.com/yblock
46yblock has the goods
When oil (or enough oil) can't get to the rocker arms, then the rockers seize on the shaft and the valves get sticky in their guides, all of which will bend your pushrods.
Most likely, the passage for oil along the head deck or the passage thru the head to the rocker stand is plugged up. Also, in 3rd place, your rocker shaft could be clogged with gunk.
Fix it now, because all you'll do is bend more pushrods if you try to keep running the rig.
Most likely, the passage for oil along the head deck or the passage thru the head to the rocker stand is plugged up. Also, in 3rd place, your rocker shaft could be clogged with gunk.
Fix it now, because all you'll do is bend more pushrods if you try to keep running the rig.
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