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Joined: Mar 2008
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Grease Monkey
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Grease Monkey
Joined: Mar 2008
Posts: 22 |
Greetings All ! I am preparing to replace the head on my ’32 chevy. It has been running on 5 cylinders for quit a while now and as a tribute to the stove bolt six, it has performed pretty well. Now I’d like to see what 6 cylinders feels like. Some years ago I was told that the head on my ’32 was actually a ’31. I decided to look for the correct head, have it reconditioned and put it on the car. I now have the reconditioned head and as I do the planning for the job some questions have come up. I made an identification of the new head which may not be accurate. The numbers on my new head are 836718 CONV 12 and D 14 2. Can anyone out there id this head for me? Also, since the head currently on the engine is a ’31, are the rocker assembly and push rods going to be an issue or could I assume that if they work with the ’31 they will also work with the new head (a ”˜32 I hope). Finally, I would appreciate your views and guidance on having the rocker assembly reconditioned (recondition the shaft, grind the rocker arm and install new bushings). I see that the Filling Station offers this service. I have not taken the valve cover off yet but I am not sure how to evaluate the need for replacing the bushings when I get there. Any advice and or information is welcomed.
P.S. I have been reading the posts on this forum (I finished about 65 of the 171) and I wish to thank you all for the education and information I have received. ……..Greg
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
Yes, according to the cylinder head casting number and the casting date, you definitely have a 1932 cylinder head. I would stay with the 1932 rocker arms and shaft. Also, going with reconditioned rocker arms, shaft and bushings is highly recommended.   
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Mar 2008
Posts: 22
Grease Monkey
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Grease Monkey
Joined: Mar 2008
Posts: 22 |
Junkyard Dog, thanks for the confirmation and advise. I'll be starting this week.
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Joined: Jul 2005
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ChatMaster - 3,000
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ChatMaster - 3,000
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There was a change in the ratio of valve rockers in 1932 .
The 1932 rockers increased the Valve lift from .277" in 1931 to .309" in 1932. this was to compensate for an advance of 8 degrees in valve timing.
You may have to measure valve lift with a dial indicator to check and see if you have 1931 rockers or 1932 rockers.
1932 valves were also a one year only valve.
JACK
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
The '32 rocker bushings and shafts are also larger diameter than '29-'31. If the push rods center in the holes in the head then you should have the right rocker arms for the head. If to one side then they are not. The part numbers are on the rockers, shaft supports so you can tell that way also.
How Sweet the roar of a Chevy four!
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Joined: Mar 2008
Posts: 22
Grease Monkey
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OP
Grease Monkey
Joined: Mar 2008
Posts: 22 |
Jack and Chipper thanks for your help from ”˜Down Under’ and ”˜Deep in the Heart of’…… it will take me a few days to get to a dial indicator and I am sure the valves are ’32. I did pull the valve cover and found the number on the shaft support matched my 29-32 Parts Price List (836813) the rocker arm was another story. The number in the Parts book was 836765 the rocker arm I removed is 836873. It can’t be 29-31 since there is no ”˜wick’ hole and the shaft diameter obviously matches the shaft support. My parts book seems to have some flaws or it is incomplete……..Any thoughts???......Thanks….Greg
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Joined: Dec 2001
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Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
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The parts book number does not match the number on the part. In the parts book you find the part number. Perhaps the number on the part is a casting number. Life is NOT simple.  
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: Nov 2001
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Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
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Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Jul 2005
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ChatMaster - 3,000
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ChatMaster - 3,000
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The 1931 rockers i have has a forging number on the valve end
which is 335549.
The shaft diameter measures approx .725"
I don't have any 1932 rockers or shafts to compare numbers.
JACK
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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
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In your case you are seeing the casting number.
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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