Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 Cart  | Project List | Order Status | Help    
  We salute a legendary member of the community.
Thank you for selflessly sharing your wisdom with us...
Go Back   Pelican Parts Technical BBS > 1- Porsche Technical Forums > 911 Engine Rebuilding Forum

Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Doc Speed
 
Neil '67 911S's Avatar
 
Join Date: Mar 2008
Location: Massachusetts
Posts: 208
2.2/2.4L biral cylinder specs

Listers,

Does anyone know the as-new spec and max limit spec fo 2.2/2.4L biral cylinder bore vertical taper and ovality? I have only seen these specs for a SC/912 biral cylinder.

Thanks!

- Neil
'67 911S (Ol' Ivory & the Rust Bucket)
Old 03-20-2008, 11:42 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Dec 2000
Location: philadelphia, pa
Posts: 477
Neil,
From the tech specs book, max bore wear limit is .1 mm oversize, max ovality is .04mm. Ovality is to be measured at 2-3mm below the top as well as at the level of the base gasket, max bore only at the 2-3mm from the top. The new tolerance is .01 mm, actual size depends on the cylinder markings(0,1,2) Hope this helps.Paul.
Old 03-30-2008, 06:55 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #2 (permalink)
Registered User
 
al lkosmal's Avatar
 
Join Date: Jul 2001
Location: mt. vernon Wa. USA
Posts: 4,838
Per Waynes rebuild book:
for 2.2/2.4 cylinders
Standard size 0: 84.000-84.010
Standard size 1: 84.010-84.020
Standard Size 2: 84.020-84.030

The measuring point for cylinder wear is 30mm below the upper edge and at the base gasket height. The cylinder is worn if the measurement is greater than the installed measurement by .1mm or greater
Cylinder ovality is measured at the same heights, as above, and considered out of spec if out of round by .04mm or more.

Note: The 30mm height differs from the 2-3mm in the previous post. also, Waynes book shows the ovality apec at .04mm vs the new tolrance of .01mm in the previous post.

Perhaps pjh69911 and others will chime in to help clarify.
__________________
70-914X resto-mod
73 911X Cafe Racer...off to San Francisco....77 911S...off to NY.....71E....off to Paris, 66-912.... off to France
Early S #1240
RGruppe #669
Old 03-30-2008, 09:11 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #3 (permalink)
Registered User
 
Join Date: Dec 2000
Location: philadelphia, pa
Posts: 477
Per my spec book, the ovality and wear are 2-3 mm below the return point of the top ring, which is below the top of the cylinder. I think 30 mm would be far beyond this and might underestimate the actual degree of wear. Hope this clarifies my prior post. Paul.
Old 03-30-2008, 05:44 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #4 (permalink)
Registered User
 
al lkosmal's Avatar
 
Join Date: Jul 2001
Location: mt. vernon Wa. USA
Posts: 4,838
2.2/2.4 cylinder specs

I think that the 30mm from the top spec and the 2-3mm below the contact must refer to the same place, I.E. where the ring(s) contact/wear area is located. Here is a factory reference that matched Wayne's book.


__________________
70-914X resto-mod
73 911X Cafe Racer...off to San Francisco....77 911S...off to NY.....71E....off to Paris, 66-912.... off to France
Early S #1240
RGruppe #669
Old 03-31-2008, 06:41 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Dec 2000
Location: philadelphia, pa
Posts: 477
Al,
I've found your reference in my '72 manual. In my 69 spec book, it is as I have indicated. In my large early manual, it says "diameter of the cylinder bore should be measured 30mm above the bottom edge of the cylinder. I guess I'd check the diameter at several spots, and if out of spec, don't use. Paul.
Old 03-31-2008, 01:49 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #6 (permalink)
 
Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
Old 03-31-2008, 01:49 PM
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 12:36 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.