 one side magnesium case on the other side aluminum? |
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| wes |
 Feb 25 2026, 06:28 PM
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#1
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wes  Group: Members Posts: 1,597 Joined: 8-December 07 From: Ukiah Ca Member No.: 8,436 Region Association: Northern California 
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Well I got this great deal on 2.0 case except with my excitement and lack of knowledge is it possible said case is actually one side aluminum as was told and the other side magnesium? If so, what heck can I do with it?
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| davep |
Feb 25 2026, 07:55 PM
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#2
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914 Historian Group: Benefactors Posts: 5,358 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
A 2R/3R case combo is normal. See this thread of mine:
https://www.early911sregistry.org/forums/sh...-case-Revisions The mating numbers are on the top about middle on the case stud bosses  |
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| Superhawk996 |
Feb 25 2026, 08:10 PM
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#3
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914 Guru Group: Members Posts: 7,723 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(davep @ Feb 25 2026, 09:55 PM)  The mating numbers are on the top about middle on the case stud bosses @daveP help me here Is 2R / 3R “normal” or is this more of a situation where the factory revised one side before the other? I know I have a 7R (73.5’ 2.4L) pair but perhaps that’s more a unique situation of 7R being the end of the line for the mag cases and the two halves were both at the same revision simultaneously? Similarly I always thought / read the 3R cases were largely equipped with oil squirters vs the early 2.0l 2R cases without? Even in the Bruce Anderson book this is all pretty fuzzy. Want to learn more. Note: cool Matrix - hadn’t seen that before. I guess coincidental I’ve only seen 2R/2R or 3R/3R matched pairs - I’m defiantly not well versed on nuances of 911 history. |
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| davep |
Feb 25 2026, 08:20 PM
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#4
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914 Historian Group: Benefactors Posts: 5,358 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
QUOTE(Superhawk996 @ Feb 25 2026, 09:10 PM) QUOTE(davep @ Feb 25 2026, 09:55 PM) The mating numbers are on the top about middle on the case stud bosses @daveP help me here Is 2R / 3R “normal” or is this more of a situation where the factory revised one side before the other? I know I have a 7R pair but perhaps that’s more a unique situation of 7R being the end of the line for the mag cases and the two halves were both at the same revision simultaneously? Similarly I always thought / read the 3R cases were largely equipped with oil squirters vs the early 2.0l 2R cases without? Even in the Bruce Anderson book this is all pretty fuzzy. Want to learn more. Note: cool Matrix - hadn’t seen that before. I guess coincidental I’ve only seen 2R/2R or 3R/3R matched pairs - I’m defiantly not well versed on nuances of 911 history. Yes, you need to study my thread (post 5) on Early 911S Registry. The R's (revisions) tell the story of constant improvement. |
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| Superhawk996 |
Feb 25 2026, 08:29 PM
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#5
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914 Guru Group: Members Posts: 7,723 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(davep @ Feb 25 2026, 10:20 PM) Yes, you need to study my thread (post 5) on Early 911S Registry. The R's (revisions) tell the story of constant improvement. Bookmark added. Thank you Dave for that history lesson. (IMG:style_emoticons/default/pray.gif) |
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Posts in this topic
wes one side magnesium case on the other side aluminum? Feb 25 2026, 06:28 PM
wes RE: one side magnesium case on the other side aluminum? Feb 25 2026, 06:30 PM Superhawk996 Both case halves are magnesium. 2R case vs 3R case... Feb 25 2026, 07:30 PM
wes
Both case halves are magnesium. 2R case vs 3R cas... Feb 25 2026, 07:49 PM mepstein Top of the case halves at the seam.
I agree, if t... Feb 25 2026, 07:58 PM wes Is this possibly the number? Feb 25 2026, 08:03 PM wes Relief! Feb 25 2026, 08:11 PM Superhawk996
Relief!
:headbanger: :trophy:
Sorry for t... Feb 25 2026, 08:20 PM davep No, that is your engine serial # 6404466. It is a ... Feb 25 2026, 08:14 PM mepstein Now find the owner of the car it came in and sell ... Feb 25 2026, 08:19 PM SirAndy
Now find the owner of the car it came in and sell... Feb 25 2026, 08:52 PM |
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