The International Cessna 170 Association

Pdogace wrote:I really, really, really want one of those Electronic International engine computers. Hope you can do a second thread on that once you have it up and flying again.

Hi Preston,

I will see what I can do. I installed one on a 182 recently and now I have mine and another one going into a Cardinal in the shop. I will take some pictures.

Thanks for the pics! I love freshly cut and oiled metal ... mmmm, I can smell it from here!

nippaero wrote:Through bolts get wire wheeled, chased and cleaned. Then the O-rings go on.
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I would guess that the through bolts have rolled threads. If so, chasing threads with a standard die would be a mistake on rolled threads, as it would create a stress riser by cutting into the root radius.

Someone had asked about the old gears and how bad they were worn. I have heard that a big source of metal in the oil on these engines if from the starter gears. I should mention that I am switching to a SkyTech starter. Not because of this, I had already bought the SkyTech before I torn down my motor.

The engine is back upright on the stand. I am waiting for a few more parts to arrive from Western Skyways before we can go much further. The cases are together again at least. Hopefully for a LONG time.

We got a few more things done while waiting for some parts. I am using all new hardware (nuts/bolts/washers etc). For some reason we received the wrong accessory case gasket so I had to order a new one.

Putting the cylinders together.



CMI piston boxes have ECI pistons inside




Installing rings on the pistons.


Lots of oil. Then stick your hand in and smear it all around.


I am still waiting for the piston pins to show up. So the pistons are temporarily installed for now.


Rinse and repeat 5 more times.

I'm curious. Was the gasket and the seal for the prop control and the AN6227-28 o-ring for the crank piston included in the gasket kit or did you have to purchase/procur them elsewhere?

BTW remember that -2H case I told you I would likely have you might have been interested in. Well turns out our -A crank had a cracked flange and we had to go to plan B and use the -B (-2H) crank we found in our 0-300-A to rebuild the -2H case up for a motor. This was the only clearly legal path we had without doing some magic paperwork.

So I'll also be building up a -2H in the next month.

The gasket kit I got did not have any gaskets for prop control. I was wondering the same when I ordered it. I ordered the oil seal and gasket from Univair. The other thing I am missing is the piston pins. I overlooked them when I ordered my cylinders. I thought they came with the cylinders but they don't. The 470/520 cylinders we have been buying included the pins.

The other thing to make sure of is the gasket for the accessory case. Note that there are a couple different styles. The gasket "kit" I received had the wrong one.

Bruce Fenstermacher wrote:I'm curious. Was the gasket and the seal for the prop control and the AN6227-28 o-ring for the crank piston included in the gasket kit

Bruce, where is the AN6227-28 O-ring you are referring to?

Look in the center of your crank. The piston which is held in with the snap ring takes this o-ring.

Yes, I knew the accessory case gasket might be (is likely) wrong but won't know till I get the one in the kit and match it to my accessory case. Same thing happened on my first C-145 overhaul.

And I did catch the piston pins. Adds another $50 per cylinder. This is why in another thread I said the Continental original cylinders, which come with a piston pin, at $1032 a cylinder, is the cheapest cylinder option going.

A very popular price for the Superior is $1069 though I've seen them offered at $1031 but then you add the $50 and change piston pin to it and thats if you can get that price which not all offer.

Ok, I gotcha. The plug on the crank was installed by Aircraft Specialties when they overhauled my crank.

Do the CMI cylinders come with valve covers? It seams like you get one or the other.

I'm still scratching my head a little bit on the accessory gasket. My accessory cover is a 530007 which I believe is the old style.

Got the right accessory gasket installed.

My original mags are getting overhauled and are getting new drive gears and impulse couplings.





Mags are original to the plane on one serial number apart.



Fresh paint.



New Slick Harness.

Just one more quick picture. Here I have the generator and starter test fit.

Look ma, no more palnuts!

Arash, Mike can make his own comment but if I was to document the rebuild of my -2H which I'm about to start assembling, you will see the same rubber hoses and clamps. If these engines where cheap to overhaul maybe I'd have splurged an extra $600 to stop some oil dripping a couple of years down the road.

But they are not cheap to overhaul and a couple of drops of oil down the road is well, down the road. 70 year old technology, which BTW matches the rest of the engine, mags, carb, and starter in my case, is whats going back into the 70 year old plane.