Re: Alloy types used in Alfa motors (was: main bearing cap removal)

[bearbvd@xxxxxxxxxxxxxx (Greg Hermann)]

At 1:35 PM 5/26/03, Jon Pike wrote:
>I appriciate all the suggestions..
>
>Tom's is a good one.. I tried a vise grip and rag, and didn't get enough
>grip to get anywhere.  I sure did not want to chew up my bearing cap!
>The soft aluminum strip will be a good buffer, since that cap is HARD stuff!
>
>It kinda brought up the question, what kind(s) of alloys are used in the Alfa
>motor?
>
>I have a kind of a long splinter on the edge of one cap, apparently from the
>forging process, and though it looks scary, it's going to take lots of
>force to
>remove.  The thing rings like a tuning fork, and even though it's very thin,
>is hardly bendable with your finger.  It acts much more like steel, than the
>aluminum I've dealt with.
>
>I know there's dozens of Al alloys out there.. was wondering if there is a
>listing
>of various ones for various parts.

In general, not for Alfas specifically, you could find a listing of the
various Al alloys and their properties and typical applications in an SAE
handbook.

Greg
>
>Just curious..
>
>Jon
>
>Tom Sahines wrote:
>
>>Get a piece of aluminum sheet, soft 1/16" thick. Cut a strip about an
>>inch wide and 4 inches long. Put it over the center of the cap (I assume
>>#2 and #4 are the problem). Clamp a vise grip over the cap (the aluminum
>>strip protects the bearing cap) and use a scewdriver from the edge of the
>>crank to pry off the cap. If you can not pry then use a slide hammer on
>>the end of the vise grip. Harbor freight makes a nice slide hammer kit
>>that has an adapter to mount the slide to a vise grip.
>>
>>Tom Sahines ARA tech hot line.
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