The rebuild of the original Opel 1.5L motor
Kettenkrads are powered with a Opel Olympia 1.5L car motor of 36Hp that was built by the Adam Opel Company of Rüsselsheim (a subsidery of General Motors in pre war days, GM washed their hands of Opel at the end of WWII). My kett came to me with its original 1.5L P1 type motor which is a VERY rare thing as the wartime built units are notorious for being of weak construction and generally poor quality, especially true in the later stages of the war. Lots of kett owners in Europe are in amazement I have the original motor for my vehicle and it is not uncommon for ketts to be running with a post war P2,3 or 4 motor (which are better built and of heavier construction). As there are only two of these motors in Canada and maybe a dozen or so (in ketts) in the US and it is the original I have to go the distance to save this motor.

Verbus marked rod bolt, note the thread not true to shaft and it going off on a bias.

Going to West Carleton Automotive for rebuild.

As the motor turned freely I thought, naive me, that I was not going to experiance to much butt hurt on the motor rebuild, sadly that was not to be. Once Jeff at WCA took off the push rod cover I got the phone call I was hoping I would not get. Seems Euro Bubba, had froze the block and done a repair with lead (got to really contaminate the crack) to keep it running. Two cracks this large C shaped piece of evil and another on the opposite side. Both, according to folks in Europe common failure points, sort of like the MB block failing cracking behind the starter.

So the block takes a nice ride down to David Cromptons in Michigan and is left for him to work his magic. WCA had asked me when I dropped off the block for disassembly if it has Babbit or insert bearings? Christ knows? I did not even know what a babbit bearing was (I do now) and all the torques and specs they would need to rebuild (More ?????? on my part).

^ Note the 44- T-R ###X number from Opel on the block, NSU stamps it number on a second location, either number is good on the data plate with the NSU one generally being the most common.
So to get the info Larry and Jeff needed at WCA I Googled "Opel Olympia Car Clubs" in Europe and it popped up about 15 clubs. I just started at the top contacting clubs and organizations stating what I was seeking for torques and specs, parts contacts, etc. A couple weeks go by with nothing heard from Europe, then the flood gates opened. A fellow in Germany responds, who at first I thought was just some "Euro version of a Opel Gearhead". I could not be more wrong if I tried. Turns out Rainer Weiler is a Prof. Dr. at the University of Augsburg Hochschule für Applied Sciences, who very fortunitely for me, is "into" Opels. I hit a freaking home run connecting with Rainer, a great guy who has passed on a ton of data, further contacts and assisted in the purchases of numerous parts.
With the block back from the US all welded up I treated in internally with Goodsons and just about melted my wifes hairdryer curing the stuff, amazing how much heat that can put out after about five hours of running, externally JB Weld, pressure test, evil cracks gone, or at least not an issue in my lifetime.

With the rods back from Ted Koudys at Precision Bearing Service of Beamsville, a bunch of parts out of Europe and the torques and specs by Rainer, and a nice drive to the United States and back for the welding, West Carleton can, after just about one year of agony rebuild my motor.

Original motor, back home after a year.
BEFORE
AFTER

Next posts will be on the upper bodywork.