It is currently Wed Oct 17, 2018 5:00 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Wed May 02, 2018 11:57 pm 
356 Fan

Joined: Tue Apr 01, 2008 10:19 am
Posts: 105
Location: austin, usa
Question for the experts.....are 2 pc and 3 pcs head studs the same or do 2 pcs engines use vw 25/36 hp studs?
Also, when was the through bolt used on 2pc engines? Only supers? Is the same as the later 3 pcs bolt?
Thanks

_________________
Ignacio Vivancos
Austin TX

53 PreA
56 A
65 912
77 carrera 3.0
78 SC
88 911 coupe


Top
 Profile  
Reply with quote  
PostPosted: Thu May 03, 2018 11:59 am 
356 Fan

Joined: Fri Aug 14, 2009 8:26 am
Posts: 188
Hi Ignacio
No not the same. Not VW.
Thru case bolts, same

_________________
mats carlsson


Top
 Profile  
Reply with quote  
PostPosted: Thu May 03, 2018 12:43 pm 
356Talk Moderator
User avatar

Joined: Thu Aug 15, 2013 9:15 am
Posts: 2109
Location: Baltimore, MD
As Mats says, head studs on 2-piece case engines are the same as for later 3-piece case Porsche engines. They need to be matched to the Porsche heads. VW heads are very different in size because the different valve layout.

The through case bolts were introduced 5 Feb 1954 for Supers and on 20 June 1954 for normals. This corresponds to to engines:

P-40707
P-50037
P-33189
P-21787

and up.

Of course if an earlier engine was overhauled by the factory or dealership, it was very common to drill the Ø 11mm hole at the top and bottom and install through bolts. So some earlier engines have these through bolts as well.


Top
 Profile  
Reply with quote  
PostPosted: Thu May 03, 2018 9:26 pm 
356 Fan

Joined: Tue Apr 01, 2008 10:19 am
Posts: 105
Location: austin, usa
thanks!

_________________
Ignacio Vivancos
Austin TX

53 PreA
56 A
65 912
77 carrera 3.0
78 SC
88 911 coupe


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group