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AMC Flywheel ID |
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smills61074
AMC Nut Joined: Feb/05/2011 Location: savanna, il Status: Offline Points: 270 |
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It has a full height counter weight.
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68 Blue AMX Perfect California Body going for 401/6 speed
1 1/4 ton Power Wagon Ex Colorado Brush Truck 2006 Caddy CTS V with LS2 and manual trans Corsa Exhaust Beater car (daily driver) |
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Have2SC's
AMC Addicted Joined: Nov/30/2011 Location: Norwalk, OH Status: Offline Points: 1253 |
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according to the list of casting numbers i have its for a 70-71 360. i have one just like it. Lee
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1971 SC360 Hornet 4 speed 1970 Javelin 390 4 speed "Base Model" 1967 Rambler 220 X code 343 4 speed
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smills61074
AMC Nut Joined: Feb/05/2011 Location: savanna, il Status: Offline Points: 270 |
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Those casting number are for a 70 360 or 390. If the odd hole is put at 12 o clock, I believe it is a 70 390. Can anyone chime in and verify?
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68 Blue AMX Perfect California Body going for 401/6 speed
1 1/4 ton Power Wagon Ex Colorado Brush Truck 2006 Caddy CTS V with LS2 and manual trans Corsa Exhaust Beater car (daily driver) |
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asifnyc
AMC Nut Joined: Apr/30/2008 Location: SF Bay Area Status: Offline Points: 390 |
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I just wanted to chime in here as I was trying to ID a few flywheels this morning...
I have TWO 3197219 flywheels (no "-c"). Most of the other posts talk about setting the casting number to the 12 o'clock position and then seeing where the weight is. When I do this I get the weight at different positions (2:30, 7:30). But if I do as amc67rogue says -"All clocking should be from the 1 off set hole. All of the offset holes ARE in line with the key way on the front of the crank." THEN the counter weights are in the exact same position. approx. 1 o'clock. both have the 4.625 ish flange bore and the counter weight is not full height. based on all this I'm pretty sure these are both '72 up 360 flywheels. the main thing I want to clarify here is if acm67rogue is right, that the clcocking should be based off the offset bolt hole and NOT based on the part number (and I believe that he is), then there is a lot of confusing info out there about clocking from the part number and stating that 3197219 part number is actually 3 or more different flywheels. it'd be nice to clear this up as I see it's been copy/pasted everywhere... so, is 3197219 actually multiple different flywheels or are there only 3197219 and 3197219-c and all 3197219s are actually the same? would love to hear from someone who feels they have definitive info here. thanks! |
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mmaher94087
AMC Addicted Joined: Apr/01/2008 Location: Arizona Status: Offline Points: 1676 |
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It is my understanding that the 3197219 was only a casting number for the raw blank that was later used for the flywheel. If the raw casting number matched the part number used in the AMC Parts Book; it was a coincidence at best. At the time the castings were put into production; the assigned part number that was used on the casting may or may not correspond to the part number assigned to the part in the Parts Book.
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Mike
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6762 |
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Just from the balance perspective, the 3197219-C that I put on a stock (crank, rods, pistons) 74 401 had to be significantly weight reduced approximately 90 degrees to the counter weight.
So guessing it was from a 360 originally. The stock front balancer was untouched and the crankshaft had just a few ounces removed.
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Steve_P
AMC Addicted Charter Member Joined: Jun/28/2007 Status: Offline Points: 3760 |
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I, and others, have posted this many times but this legend won't die.
The location of the casting number as far as application determination is IRRELEVANT. Think about it, it is just something that changed over time and has NO meaning as to application. Do you think workers on a moving assembly line were looking for casting number locations to determine application? The 68-9 343 and 390 used the same head casting. If a cylinder head on a May 68 343 has the casting number in one location and the head off a Feb 69 390 has the same casting number, but in a different location, does that mean anything? Yes, it means the casting location moved over time. That is all. As said, the balance pad location to the offset hole is what matters. The 70 360 and 390 used the SAME flywheel, it's in the parts book; the casting number location is irrelevant. Edited by Steve_P - Dec/19/2018 at 9:41am |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6762 |
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I am not saying the legend should not die. What I'm trying to say that 3197219 flywheel could have been put on a 360 or 401 and the casting number is irrelevant. But the balance of these different engines is not the same. So you cannot assume that this casting was for a 360 or 401.
So if the flywheel is not identified when taken off an engine, then the rotating assembly must be re-balanced.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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The 3197219 part number is stamped in nearly every configuration of flywheel so, going by part numbers is confusing. You have to measure that one to know for sure. 304 & 360 Flywheels: Generally speaking... the counter wight is 1/2 as deep as what is found on a 390-401 flywheel
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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AMC did things to make it work and keep production flowing. And when AMC started putting 6 cylinder flywheels on 79 304s, and someone asks for that flywheel and you say, yeah I got one, you get beat up by forum members claiming it isn't a 304 flywheel. I used to own a 79 AMX with a 304 4 speed. Factory trans, factory bell ,factory flywheel. I parted it out, it was a rust pile. The flywheel looks like a 6 cylinder flywheel but is balanced to the 304. So don't bomblast people over it anymore. Whew glad I got that off my chest, hopefully it will rest now.....
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70 Javelin SST, second owner, purchased 1972
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