Rocker Box Leak part2
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Tourer
Joined: Oct 2007
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Rocker Box Leak part2
Ok so I am fixing the leak that was addresed in part 1. I have one of those fittings that is used to add an oil pressre gage in place of the end screw. That SOB is on so tight I can't get it off ! I want to replace it with a stock end screw anyway. So I tighten down the other side ( the red nuts) and can't get it tight enough to break lose the fitting. I read the manual and see how it comes apart. So I was thinking to take off the rocker and take the whole box apart and get the rocker bolt in a vice to get that fitting off. Any tips or suggestions ?
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
I would not take the rocker box off!
The fitting screws into a cap (modified with a threaded hole for the fitting) correct?
If that fitting comes straight out of the end cap use a hand held impact driver. This is the best way to remove it or the cap. The impact jolt is what works.
If the fitting is a right angle brass fitting then you cannot use an impact. Just get a very big wrench (Cresent or Pipe Wrench) and grab the fitting. Slowly start to unscrew it. See if the fitting breaks loose or does it turn the rocker arm inside the box?
If this rotates the rocker arm then you are going to have to do something else. I'm thinking, I'm thinking...........
pg
The fitting screws into a cap (modified with a threaded hole for the fitting) correct?
If that fitting comes straight out of the end cap use a hand held impact driver. This is the best way to remove it or the cap. The impact jolt is what works.
If the fitting is a right angle brass fitting then you cannot use an impact. Just get a very big wrench (Cresent or Pipe Wrench) and grab the fitting. Slowly start to unscrew it. See if the fitting breaks loose or does it turn the rocker arm inside the box?
If this rotates the rocker arm then you are going to have to do something else. I'm thinking, I'm thinking...........
pg
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
An impact is the best way to remove the right side cap, but I do not know what his oil gage fitting looks like.
He may have to remove the rocker box then remove the rocker arm shaft from the right side.
He still will have a problem holding the shaft to break loose the fitting/cap.
Holding it in a vise will.......
1) Not work well at all.
2) Surely damage the shaft when it turns. And it will turn.
If it were me and I had to remove the shaft I would chuck it up in my lathe chuck to hold the shaft, then lock the lathe down and have at it removing the fitting/end cap.
He may not have access to a lathe though.
pg
What i call "jam nuts" are ones that are thin, about 1/2 the thickness of regular nuts. I do not know what is the usual application - i think to install against a regular nut as a way to lock it in place. I have used them before in this kind of situation - to remove a stud. Two may fit, tho i have not tried it for this application.
Last edited by IronMick; Dec 8, 2009 at 07:26 AM.
Road Master
Joined: Mar 2006
Posts: 775
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From: OC California
I have used the jam nut idea because the rocker shaft was turning. This was after I tried the impact wrench with no success (the shaft was turning freely and the allen plug was crossthreaded on the shaft. I bought that rocker box from a swap meet so look out there. The dual thin jam nuts will allow a wrench to grab the one nut while the other keeps it from turning. I had good results. Oh, gotta use a thin wrench too. Won't work if you grab both nuts. JMO
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Tourer
Joined: Oct 2007
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I have tried the jam nuts and still couldn't stop the shaft from turning. The fitting is the style that I can put a socket on it and hit it with the impact so we will se tonight if it will break loose or not !
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Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
Good that it is a straight on fitting.
Use the impact with a socket, and also use a large hammer swung with authority!
Those caps get really tight because of the O ring I guess, and using an impact is the only thing I have found that works.
The question remains........ Will the cap loosen or is it going to be the fitting that loosens? See what happens and then give a report.
pg
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