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jays58s
Samba Member
Joined: August 23, 2004
Posts: 2133
Location: Nor-Cal
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 Posted: Sun Aug 18, 2019 9:11 am Post subject: Early vs Late Oil Pressure relief |
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| I know the oil pressure relief screw changed in 1957 or so, but are the plungers and relief springs the same for early vs late 36hp engines? |
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Snort
Samba Member
Joined: April 02, 2005
Posts: 1957
Location: Seattle, WA
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| Posted: Sun Aug 18, 2019 11:38 am Post subject: Re: Early vs Late Oil Pressure relief |
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| The spring and plunger is the same. The plug that holds them in is different. |
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jays58s
Samba Member
Joined: August 23, 2004
Posts: 2133
Location: Nor-Cal
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| Posted: Sun Aug 18, 2019 11:56 am Post subject: Re: Early vs Late Oil Pressure relief |
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| Snort wrote: |
| The spring and plunger is the same. The plug that holds them in is different. |
Awesome, thank you! |
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Zwitterkafer
Samba Member
Joined: November 17, 2007
Posts: 879
Location: Lanark County, Ontario, Canada
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| Posted: Sun Aug 18, 2019 12:11 pm Post subject: Re: Early vs Late Oil Pressure relief |
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The '52 - '57 service manual mentions the change from hollow plug to solid one, at chassis # 1397440, along with the oil delivery channels being increased by 1 mm in diameter. From the drawings, the earlier hollow plug looks to have a larger threaded diameter, so it may not be possible to mix the two plugs up. Only a single spring length is given for checking purposes, and no mention is made of changes to the pressure relief piston.
_________________
"Criticism comes easier than Craftsmanship"
- Zeuxius, 400 BC |
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jays58s
Samba Member
Joined: August 23, 2004
Posts: 2133
Location: Nor-Cal
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| Posted: Sun Aug 18, 2019 12:32 pm Post subject: Re: Early vs Late Oil Pressure relief |
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| Zwitterkafer wrote: |
| The '52 - '57 service manual mentions the change from hollow plug to solid one, at chassis # 1397440, along with the oil delivery channels being increased by 1 mm in diameter. From the drawings, the earlier hollow plug looks to have a larger threaded diameter, so it may not be possible to mix the two plugs up. Only a single spring length is given for checking purposes, and no mention is made of changes to the pressure relief piston. |
Awesome, hopefully the spring and piston are interchangeable then. I know the plugs aren’t because the early hollow one is too big. |
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Kjell Roar
Samba Member
Joined: December 08, 2008
Posts: 1326
Location: Norway
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| Posted: Wed Sep 04, 2019 2:32 pm Post subject: Re: Early vs Late Oil Pressure relief |
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Through the years I have seen several factory refurbished 57 or newer motors, but havent seen earlier 36hp as factory rebuilt ones.
So I assume that VW didnt use the cases with the smaller oil gallerys when the new ones came. Its also more material around one of the main bearings from 57 up.
I have a september 57 factory refurbished engine in my oval, changed in Hamburg in 1964, after 118.000km. Now km is 285.000. Also have 2 low mileage factory refurbished engines on my shelves, one 57 and one februar 58.
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I got a historic car, every scratch got a history...
My car, Aug. 4th, 1955 / an early 56: http://www.thesamba.com/vw/forum/album_page.php?pic_id=610438 |
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