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Alan Brase
Samba Member
Joined: March 28, 2004
Posts: 4570
Location: Cedar Falls, Iowa
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 Posted: Sat Oct 09, 2010 12:06 am Post subject: rocker stands early 40hp |
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I know the early 40 hp heads are different in the rocker stand boss area. Are the stands for the rocker shafts different too? I have an early set of heads putting on a later 1964 or so engine. What do I need?
Al
_________________
Al Brase
Projects: 67 sunroof bug, 67 Porsche 912 Targa, 70 Westy
Dec 1955 Single Cab pickup WANT 15" BUS RIMS dated 8/55, thru 12/55
To New owners: 1969 doublecab, 1971 Dormobile
Vanagons:
80 P27 Westy JUL 1979, 3rd oldest known US
83 1.6TD Vanagon, 87 Wolfie Westy daily driver, swap meet home |
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26533
Location: Douglas, WY
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| Posted: Sat Oct 09, 2010 12:11 pm Post subject: |
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They should fit OK. The big difference on like later heads is the stud has a slightly larger diameter at the very bottom and the rockers need to be large enough to fit there. Going the other way is no problem.
The early heads you have, what casting/part number do they have on them? Do they still have the "long studs" or have they been converted to short studs? And if converted, which conversion type was it - slotted insert in the head, pull-through insert into the original hole, giant metric step-stud installed?
Also, what kind of heads were on the engine before this? if they were the heads VW started using in November 1964, those used longer upper head studs than previously.
-Andy |
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Alan Brase
Samba Member
Joined: March 28, 2004
Posts: 4570
Location: Cedar Falls, Iowa
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| Posted: Sat Oct 09, 2010 1:29 pm Post subject: |
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| glutamodo wrote: |
The early heads you have, what casting/part number do they have on them? Do they still have the "long studs" or have they been converted to short studs? And if converted, which conversion type was it - slotted insert in the head, pull-through insert into the original hole, giant metric step-stud installed?
Also, what kind of heads were on the engine before this? if they were the heads VW started using in November 1964, those used longer upper head studs than previously.
-Andy |
Not sure about the number, but it seems like a /A. The others I have are /c. I'm just putting this together from some piles of parts so its not original to the car. The car is a 63, actually, I guess. People talk about how good the original 40 hp cars were, I picked up these heads on ebay for $80 and they are beautiful. Left overs from a machine shop.
The area where the rocker stands fasten is like a big slotted screw with a threaded hole in the middle.
So a bolt goes into it.
Actually I can remember working on 40's that needed the rocker stud repair back in 1966 when I worked in a shop as a kid. But I just pulled the motors and a better mechanic actually did the repairs.
Al
_________________
Al Brase
Projects: 67 sunroof bug, 67 Porsche 912 Targa, 70 Westy
Dec 1955 Single Cab pickup WANT 15" BUS RIMS dated 8/55, thru 12/55
To New owners: 1969 doublecab, 1971 Dormobile
Vanagons:
80 P27 Westy JUL 1979, 3rd oldest known US
83 1.6TD Vanagon, 87 Wolfie Westy daily driver, swap meet home |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26533
Location: Douglas, WY
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| Posted: Sat Oct 09, 2010 1:56 pm Post subject: |
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| 69doublecab wrote: |
I picked up these heads on ebay for $80 and they are beautiful. Left overs from a machine shop.
The area where the rocker stands fasten is like a big slotted screw with a threaded hole in the middle.
So a bolt goes into it.
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Okay. yours have the kits in them then. Good. You shoudln't have any issues with the rocker arms. And you can set your valves to .006". I switched to the stronger square-boss heads several years ago, but I ran round-boss for many years before that. I did have some issues, aside from "stud kit" problems, one or two heads wore out the valve seats, I'm guessing unleaded fuel contributed to this - they just eroded further and further down - so was always finding tight valves on adjustments. And I had one head crack on me and blew out a spark plug.
Oh, one tip - I find that over time a little bit of oil likes to "wick" down that rocker arm bolt on those kind of kits, and leak out the back. What I did was, from underneath the head, fill the back of those stud kit inserts in the heads with orange RTV silicone. (it's about the ONLY place I'll let that stuff touch my engine. Don't use it anywhere else please!)
Another tip about round boss heads, from the factory manual:
-Andy
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