Bob,
If you don't have a data plate on the engine, the only way to determine the size will be to start taking the engine apart. The pistons will typically have a stamp on them on the top that can be read with the cylinder head removed. That will give you their diameter size, 90/92/94,etc in mm. If the engine has been run, you'll need to clean them up to find it. Harder to tell the throw on the rods. You'll need to take the engine apart further. I would highly recommend you buy several books on this before you do it, I bought all my references through either Great Planes or Revmaster. There is also a ton of VW engine videos on youtube that are pretty good but don't help on the aviation mods that are typically done. I was able to tear down my Revmaster VW 2100D and rebuild it in approx 20 hours. Not bad for my 1st time. I had a case crack that required it. My crank, rods, and pistons were all fine and did not need to be replaced. I did replace the CAM to increase performance. The cylinder heads are really the only thing that requires constant attention (valve adjustments) and most likely replacement, I am on my second set of heads at 630 hours. My dual Bendix Magneto was also serviced/repaired once. Overall my engine reliably has been pretty solid. Rob Schmitt KR2S N1842Z www.robert7721.com -----Original Message----- From: Paul via KRnet <krnet at list.krnet.org> To: KR2List <krnet at list.krnet.org> Cc: Paul <airguynh at comcast.net> Sent: Thu, Jun 4, 2015 6:24 am Subject: Re: KR> Vw questions There is an accessory case on the "back" of the engine that can have a mag and a starter motor. Search the Great Plains for the part. Actually they are a great source for everything VW. ----- Original Message ----- From: "Bob Boyd via KRnet" <krnet at list.krnet.org> To: "KRNET" <krnet at list.krnet.org> Cc: iflyexp at gmail.com Sent: Wednesday, June 3, 2015 6:57:48 PM Subject: KR> Vw questions If I purchased a VW engine that is currently on a plane and appears to have been flown in the past, how can I tell what size it is and can I add electric start to it being that it is currently hand prop Total rebuild without question but just wondering about those two things Bob Boyd Sent from my iPhone _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options