300 Pushrods

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Dec 22, 2005 | 09:34 AM

FBerger

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From: Murdock, KS

300 Pushrods

OK, here is the deal. I had my head rebuilt. I installed it following the Haynes manual. It said to torque the rocker arm bolts/nuts to 35 ft/lbs. When I did this and tried to start the truck it bent all the pushrods, cause of course nothing could move. I have worked on quite a few ford engines, but have never had this problem occur. Any ideas as to why it said that?

Dec 22, 2005 | 09:38 AM

ford390gashog

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From: Brentwood,CA

are the pushrods the same length? did you set preload? or if its adjustable , lash?

Dec 22, 2005 | 10:27 AM

FBerger

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From: Murdock, KS

They are all the same length. What I did to fix it was of course put in all new pushrods, then tightened them down some. I started it up, and adjusted them until the engine was running smooth.

Dec 23, 2005 | 12:18 AM

mrider1

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My haynes book says 17-23 ft pounds on the rocker arm bolts/nuts. Maybe you should double check that book to see if maybe you didn't look at it wrong.

Dec 23, 2005 | 09:39 AM

fordborn

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From: Northwest, Arkansas

Thread moved to " Inline Six, 200, 250, 4.9/300" tech forum. Should have more information available in this forum.

Dec 27, 2005 | 06:38 AM

FBerger

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From: Murdock, KS

Checked it 2x that is what I torqued it to. I talked to my buddy who is an avid Ford man. To adjust the valves you bring #1 to TDC. Split the harmonic balancer into 3rds. Tighten #1 down until you cannot turn the pushrods with your finger. Turn the engine to the next mark and tighten the next one in firing order. Worked good, and runs great. Thanks