one side magnesium case on the other side aluminum? Options

[wes]

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?

[wes]

[Superhawk996]

Both case halves are magnesium. 2R case vs 3R case.

Unfortunately it’s not a great plan to be mix and matching case halves. There are multiple reasons for this. Probably not worth going into details here but case halves are machined as a pair. You can’t just mix and match two separate case halves without line bore, and incremental machine work.

Sorry to be the bearer of bad news. Even if you went to the trouble of doing the machine work, any future buyer would be suspect of the mismatched case halves.

Would make for a great coffee table. (IMG:style_emoticons/default/confused24.gif)

Perhaps I’m off my rocker and others will correct me.

edit: you could do a quick check - case 1/2’s are factory stamped as a matched pair (ex: 931, 123, etc) before they are machined to keep them in matched pairs. You could check to see if both 1/2s have the same number and came from factory as a 2R/3R pair.

Another tell: early cases don’t have oil squirters. Are both 1/2’s the same (ie no squirters) on both 1/2’s?

[wes]

Both case halves are magnesium. 2R case vs 3R case.

Unfortunately it’s not a great plan to be mix and matching case halves. There are multiple reasons for this. Probably not worth going into details here but case halves are machined as a pair. You can’t just mix and match two separate case halves without line bore, and incremental machine work.

Sorry to be the bearer of bad news. Even if you went to the trouble of doing the machine work, any future buyer would be suspect of the mismatched case halves.

Would make for a great coffee table. (IMG:style_emoticons/default/confused24.gif)

Perhaps I’m off my rocker and others will correct me.

you could do a quick check - case 1/2’s are factory stamped as a matched pair (ex: 931, 123, etc) before they are machined to keep them in matched pairs. You could check to see if both 1/2s have the same number and came from factory as a 2R/3R pair.

Another tell: early cases don’t have oil squirters. Are both 1/2’a the same (ie no
squirters) on both 1/2’s?

Where would I find that number?

[davep]

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

[mepstein]

Top of the case halves at the seam.
I agree, if the case halves don’t match, it’s better as a coffee table than an engine build.
I’m not sure of the big picture but buying an engine a piece by piece, is definitely the most expensive way to build an engine.

[wes]

Is this possibly the number?

[Superhawk996]

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.

[wes]

Relief!

[davep]

No, that is your engine serial # 6404466. It is a type 901/38 engine for a 1970 914/6 North American markets. That matches with the 2R / 3R case combo for 1970.

[mepstein]

Now find the owner of the car it came in and sell it for $$$

[Superhawk996]

Relief!

(IMG:style_emoticons/default/aktion035.gif) (IMG:style_emoticons/default/smilie_pokal.gif)

Sorry for the bad advice when I didn’t have all my facts squared up.

[davep]

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.

[Superhawk996]

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)

[SirAndy]

Now find the owner of the car it came in and sell it for $$$

(IMG:style_emoticons/default/agree.gif)

Find the original car this goes with and sell the lot for big bucks ...
(IMG:style_emoticons/default/king.gif)

PS: Looking through the VIN database, the original car should be somewhere around VIN 914.043.0750

PPS: Also found this thread:
http://www.914world.com/bbs2/index.php?sho...&hl=6404466

...