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Joined: Jan 2002
Posts: 10
Grease Monkey
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OP
Grease Monkey
Joined: Jan 2002
Posts: 10 |
Has anyone ever resurfaced the valve end of a rocker arm on a 235. Ive SEARCHED all sites and the only ref has used the word GRIND :eek: ,[sounds crude, and rought]. OR is this just not done.
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
Hi T-RUCK, Suggest you take a look here for an explanation of what is done and why. Rocker Arm Grinding Follow the discussion until you find the part on rocker arms. It is extremely important that this procedure be done if there is any wear to the face of the rocker arm that comes in contact with the end of the valve stem. To do the job correctly it must be done on a valve grinding machine. This insures that the curvature is correct. Your local machine shop will know what to do and can assist you. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Dec 2001
Posts: 11,162
ChatMaster - 10,000
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ChatMaster - 10,000
Joined: Dec 2001
Posts: 11,162 |
Everyone that I know of that does this operation do it at home on a fine stone on the bench grinder, practice wuth a couple of really bad ones then do the ones on your engine, you won't have to look at them to see if grinding is needed they will chew up your feeler gage when you try to set the gap with the engine warm and at a idle.
If you really look new old stock rockers are available, those that are worn as bad as Rays probably are worn on the shaft bearing area also. Usually a new shaft (or rotate the old one) will fix that problem,it really isn't much of a problem since the rocker just moves a few degrees.
After I thunk about it, most of the rocker shafts and rocker arms I have salvaged from 216 and 235 engines weren't worn in the shaft bearing area, in fact most of them were barely movable due to crud build up on the shafts and arms.
Life's a long winding trail, love Jesus and ride a good horse!
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Joined: Mar 2002
Posts: 421
Backyard Mechanic
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Backyard Mechanic
Joined: Mar 2002
Posts: 421 |
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Joined: Jan 2002
Posts: 10
Grease Monkey
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OP
Grease Monkey
Joined: Jan 2002
Posts: 10 |
Thanks to all for replies.
Antique Mechanic SIR I have read your[ Schools in session] spelling==== And im inpressed,[ my eyeballs need to be replaced ],but impressed nun the less. WELL DONE and a pleasure to read.
WELL back to rocker arms, After reading all posts it sounds like i have a choice, 1. SPEND$$$$$. OR 2. BE CREATIVE. Well sence money is not a problem :rolleyes: YEA RIGHT. I pic door #2. BUT FIRST let me make sure ive got this right.
1. removeing material from the tip of rocker must be kept to a minimum.
2 the tip of the rocker MUST sit flat on the valve stem. in same plain as rocker shaft.
3.THE CURVE OF THE TIP SHOULD NOT BE CHANGED.
4.WHEN IN OPERATION, the tip of the rocker should move across the center line valve stem tip, this should minamise guide wear and give max valve lift.
well i guess im going to build some type jig to do this with. if i left anything out let me know,
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
You have covered all the bases and good luck on your project.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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