Appia engine main bearing size

Dave Stebbins · Unread post by **Dave Stebbins** » 29 Jan 2009, 21:55

Greetings All,

I am just starting the rebuild of my series 3 Appia engine. It came in several boxes with lots of spare parts and I am in the process of sorting through them and finding out what is good and what is not.

This is my first Appia engine and I have a couple of questions regarding the main bearings. First, I have an Appia shop manual on loan from a friend. I cannont find any specification for the diameter of the main bearing journal, I can only find a "sketch" specifying the assembling clearances. This shop manual is missing the first few pages - the first page present is 00/5. Could the crank bearing specs be on one of the missing pages?

I have a copy of the Automobile Engineer article about the first series Appia engine. It states that the main bearing diameter is 55mm, but I would like to confirm that this is correct for the series 3. Also, I would like to know if 55mm is the diameter of the journal or the bearing. My crank journals measure 54.22mm with a digital caliper. I am going to find a micrometer to make a more accurate measurement. Two or three sets of main bearings came with the engine, but each one has part or all of the indium lining worn off, so I assume I need to find new bearings - unless it is possible to have the lining renewed.

Many thanks,
Dave

lucasgeheniau · Unread post by **lucasgeheniau** » 01 Feb 2009, 16:27

Hi,

Attached pictures come from Appia CD2 (available at this site)

Hope this will do.

Kind regards

Lucas

Dave Stebbins · Unread post by **Dave Stebbins** » 02 Feb 2009, 04:23

Hi Lucas,

Thank you for the pictures. I did not understand the specifications for the under-size bearings until I read them again in the pictures. I now know I need to find 2nd under-size bearings.

Kind Regards,
Dave

Geoff · Unread post by **Geoff** » 03 Feb 2009, 02:10

Are you familiar with Don Cross' Appia Consortium in England? He may have what you need, and as an Appia owner, please consider joining.

Dave Stebbins · Unread post by **Dave Stebbins** » 10 Feb 2009, 19:36

I read about the consortium on this web site. That's all I know about it. I thought Mike K? in PA is the guy to go to for parts in the USA.

Geoff · Unread post by **Geoff** » 11 Feb 2009, 01:09

Mike definitely is. But what Don is doing is different - he's trying to build a base of Appia parts that might not well be served through commercial interests - like remaking some stuff, having a tech'l newsletter, etc. Its not big, its not glorious, but its good someone is doing it.

There will come the day you need a part that Mike doesn't have, and the Consortium does.... and you'll thank them for being there. Supporting them up front isn't such a bad idea.
(altho I've been a bit late myself!)

TonyC · Unread post by **TonyC** » 28 May 2009, 23:57

Hi Dave,
What Geoff says is really true. I have done an almost complete resto. on a 3rd series and have purchased parts from both Micheal and Don. Both are indispensible if you are working on the Appia. The Appia conso. is definately a recommendation to join. Don does a great job finding and having things made.
Tony C

Dave Stebbins · Unread post by **Dave Stebbins** » 11 Jun 2009, 19:43

Hi Geoff & Tony,
I did join the Appia Consortium. Don is a great resource and was very helpful. Patient also as we had a little trouble getting my credit card to work. It all got sorted out in the end. Unfortunately it got warm enough outside for the Summertime house projects to start so work on the Appia has been set on a lower priority.

-Dave

Appia engine main bearing size

Appia engine main bearing size

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Re: Appia engine main bearing size