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vwpackrat
Samba Member
Joined: December 12, 2001
Posts: 611
Location: TX
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 Posted: Sun May 11, 2014 7:10 pm Post subject: what size crank pulley? |
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I have a couple different stock oem VW crank pulleys in my box of junk......one is 6 5/8" od. and the other is 7" od......which pulley is for what size of motor?
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Zundfolge1432 
Samba Member
Joined: June 13, 2004
Posts: 12467
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| Posted: Sun May 25, 2014 7:39 pm Post subject: |
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| The old 36 hp pulleys were larger in diameter than the later 40 hp and up. However the later pulleys while same in diameter timing mark location is different. John Muir's book has a nice breakdown of pulleys, years and timing specs, it's worth a look as there are at least 10 different ones. Me I'd use the larger pulley because the stock pulleys are interchangeable . That larger pulley spins the cooling fan just a little faster |
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Stocknazi
Samba Member
Joined: June 18, 2004
Posts: 5150
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| Posted: Sun Dec 21, 2014 6:24 pm Post subject: |
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Can someone post the breakdown of the different crank pulley sizes?
I have looked and can not seem to find this info on The Samba.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24759
Location: Olympia Wash Rinse & Repeat
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| Posted: Sun Dec 21, 2014 8:32 pm Post subject: |
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Just use the 7" one. It is for DH cooling system, but will work better on any earlier non-DH engine that is 40 HP and bigger.
Check out the 1963-67 Transporter Workshop Manual in the 40 HP section VW mentions using a slightly bigger than stock crankshaft pulley to help prevent engine pinking.
VW increased a few times since 1960 the size of both the cooling fan width, number of fan blades and crankshaft pulley diameter. For instance the biggest non-DH fan was 29 mm inside width measurement, DH started out with 33, then 34, and finally 35 mm.
You can research this more through the type 1 (thru the "upcoming" button) and type 2 parts reference manuals here:
http://oacdp.org/
Also another great source of info there is the "Progressive Refinements" manuals there that list by date the changes VW did to each of the VW production lines.
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Stocknazi
Samba Member
Joined: June 18, 2004
Posts: 5150
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| Posted: Mon Dec 22, 2014 5:49 am Post subject: |
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| Eric&Barb wrote: |
Just use the 7" one. It is for DH cooling system, but will work better on any earlier non-DH engine that is 40 HP and bigger.
Check out the 1963-67 Transporter Workshop Manual in the 40 HP section VW mentions using a slightly bigger than stock crankshaft pulley to help prevent engine pinking.
VW increased a few times since 1960 the size of both the cooling fan width, number of fan blades and crankshaft pulley diameter. For instance the biggest non-DH fan was 29 mm inside width measurement, DH started out with 33, then 34, and finally 35 mm.
You can research this more through the type 1 (thru the "upcoming" button) and type 2 parts reference manuals here:
http://oacdp.org/
Also another great source of info there is the "Progressive Refinements" manuals there that list by date the changes VW did to each of the VW production lines. |
I thought the 7 inch one was the biggest diameter VW used; It is a 1600 bus pulley, 7 inch D-pulley so i'll use it, thanks.
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WANTED:
58 Westfalia cabinet knobs (3 needed), roof rack, and (7) privy tent poles (silver painted).
"When the people are afraid of the government, that's tyranny. But when the government is afraid of the people, that's liberty."
"Resistance to tyrants is obedience to God."
Thomas Jefferson |
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