225 flywheel choices? bolt patterns and tooth counts..

hey all,

i recently purchased a flywheel on ebay that was listed as coming out of a commando with the 225, being that the 225 i've got built for my jeep was suppose to be out of a commando as well i figured i couldn't miss with this purchase.

well the first thing i noticed is that it was way too lightweight, on my bathroom scale it barely tipped 30 some pounds, i didn't think much of it even though i've read they correct flywheels are 45 and 100lb behemoths.

then when i went to bolt it up the pattern was wrong for the sixth bolt, so i assume it's for a 231 and the listing was incorrect. i gave the guy a ring 2 months after the puchase and he said he'll send the heaviest one that came off a 225 v6 he's got.

now i figure i really can't miss, or can i? are there different tooth counts on these things? are the 45 and 100lb models interchangable to balance the motor the same?


also should there be a serial number of sorts on the block or on the flywheel he will send me?

thanks guys you are always a big help.

 

Note that flywheel bolts are un-evenly spaced and will go on only one direction to maintain balance.

 

pics would help.

and it's 75-80#, not 100.

 

The 225 and 231 flywheels are identical in bolt pattern. It's the weight and balance that are different between even fire and odd fire. I know this for a fact as I've interchanged them both ways with appropriate balancing. The car flywheels (monza, Skyhawk, etc.) are about 35-45 lbs and the Jeep Commando and CJ flywheels are about 80 or so lbs. It's possible the motor he got the flywheel from was not original or a po had changed stuff around. It's also possible he simply made a mistake. Sounds like he is trying to make it right...
I've not run into different tooth counts between the 225 and 231 but anything is possible as the 231 was used in many different applications, even El Camino's. I know there are tons of clutch possibilities depending on application of the 231. Nickmil

 

The 225 and the 231 flywheels will interchange. The 231 odd fire wheel is lighter than the 225. Like posted before, 35-45 lbs. The odd fire 231 out of the skyhawks, monzas, use a smsller diameter clutch also. I do not know if a stock 225 clutch and pressure plate will fit the odd fire wheel.

 

The clutch, motor, and trans I used in my CJ-5 came directly from a 1980 Monza and is 10.5" in diameter. I thought that's about the size that Jeep used? Not sure on that part..
I know I've found a flywheel from an El Camino with a 231 that was a smaller clutch... oddly enough.
Nickmil

 

i tried every bolt on each opening and it really didn't match up, i know it only bolts on one way but this thing is just not happening. are you all sure 231 and 225 crankshafts are the same on the mating surface for the flywheel? i'll try it again when i have the bellhousing off....

either way the guy is sending me a heavier flywheel to replace the one he sent me so kudos to him. here are a few pics of what i'm looking at. including a casting number.

thanks for your input

flywheel
http://s73.photobucket.com/albums/i231/thenoblesock/?action=view&current=P2130001.jpg
casting no.
http://s73.photobucket.com/albums/i231/thenoblesock/?action=view&current=P2130003.jpg
rear view
http://s73.photobucket.com/albums/i231/thenoblesock/?action=view&current=P2130004.jpg
front view
http://s73.photobucket.com/albums/i231/thenoblesock/?action=view&current=P2130005.jpg

not sure why but no matter what i do the pictures won't load. the links underneath should do it though..

 

I am certain that the crank flange bolt patterns are identical between the 225, 231 and 252 engines. I believe the 350 Buick V8 is the same as well.

 

You are correct sir.