View Full Version : Engine: Commander 226 vs 246

Neal in NM
11-13-2018, 04:42 PM
I thought that I had done enough research in the difference of these two engines before I decided to try to install the bigger one in my ‘48 M16. I have run into small annoyances like, the motor mounts from where the 246ci came from not working and, the engine mounting plate clocked wrong for my starter. I knew that the water pump was different but, I didn’t anticipate an interference issue. The flange which carries the pulley and fan is too close to the radiator to install the fan or even the fan shroud. The water pump pulleys are not interchangeable, the one off of the 226ci is about an inch too short.

To make up some of the difference, I have thought about pressing the waterpump flange further on the shaft ( it can go about 3/8”) but, if I do, the pulley may not line up. Right now I don’t have the correct pulley for the 246ci so I don’t know if the flange is in the proper location.

Another thing I am concerned about is how close should or can a fan be to the radiator.

Does anyone have the correct pulley for the 246ci they could measure the height and diameter?

Has anyone else run into this engine swap problem?

Thanks, Neal

Mrs K Corbin
11-14-2018, 06:51 AM
do you have any sort of spacer on the pulley?

Neal in NM
11-14-2018, 08:55 AM
do you have any sort of spacer on the pulley?

I tried to install the fan without the pulley. There is no spacer.

Mrs K Corbin
11-15-2018, 07:07 AM
I presume that the water pump is different from 2 engines? You state that you don't have the correct engine mounts. Could the engine be spaced back a little, and still line up with tranny, etc?

11-15-2018, 09:18 AM
Some have the pulleys behind the inertia dampener, and perhaps later versions were in front, like a v8? (just wondering, I don't know)

t walgamuth
11-15-2018, 10:09 AM
I'd want at least an inch clearance to a mechanical fan.

11-15-2018, 12:39 PM
I recall it shows in the book that there were different pulleys.

There was also a change in water pumps, and an optional HD Fan. There are several *notes in the book, that would change everything from one set up to the next---so in this case you need to know what the donor engine was from, its serial number, and data on the original engine to figure it out. It sounds like you are trying to put a HD fan onto a NON HD water pump hub...... which will put the fan too far out there.

I'd look up if there was a difference in radiator, water pump/s and pulleys/ fans. To do that you need serial numbers.

Neal in NM
11-19-2018, 10:04 AM
The water pump is the problem. I was able to sneak in the four blade fan but, there was only about a quarter of an inch clearance. If I had known this before I would have found a 226ci water pump and rebuilt it. There is no way to move the engine back. According to the casting numbers, the engine is a 1960.

So, I have thought of three different solutions

1) Locate a 226ci pump and rebuild it

2) Machine a new offset pump pulley that will accept a different fan blade

3) Install an electric pusher fan in front of the radiator

I would like to do the custom pulley (because I can) but I think I am just going to go with the electric fan for now.