52concord Posted June 12, 2012 Report Posted June 12, 2012 im installing my flywheel and i cant seem to get it to sit right. is their a easy way to install it? and also my crankshaft flange is threaded and so is the flywheel its from a 52 218 Quote
james curl Posted June 12, 2012 Report Posted June 12, 2012 They both can not be threaded and work. If the flywheel is a four bolt flywheel it is from a non fluid drive engine where the bolts have special heads and install from the engine side of the crankshaft flange before the rear main cap is installed. They use nuts on the flywheel side to secure the flywheel to the crankshaft as the P-15 does. The fluid drive cars used an eight hole flywheel. you can use a four hole flywheel on an eight hole crank but you must rotate the flywheel to get the correct alignment of the four holes as the pattern in the crankshaft is not symmetrical. None are threaded as far as I can remember, hope this helps. Quote
wayfarer Posted June 12, 2012 Report Posted June 12, 2012 Threaded flywheel? Not likely... Are both pieces, engine and flywheel, 218? What is meant by 'cant seem to get it to sit right' ? If the bolt holes are not lined up, rotate it one hole at a time and you will find the proper location. If the wheel does not sit flush on the flange the look for some garbage that is in the way or perhaps there is a burr on the crank flange. The 4-hole and the 6-hole pattern are both part of the 8-hole pattern so they will align in some fashion if you have a mixed bag-o-parts... Quote
52concord Posted June 12, 2012 Author Report Posted June 12, 2012 well the engine is a 218 and im not sure if the previous owners changed it out, but yeah both the flange and the flywheel is threaded, and it is hard to make it flush Quote
Don Coatney Posted June 12, 2012 Report Posted June 12, 2012 well the engine is a 218 and im not sure if the previous owners changed it out, but yeah both the flange and the flywheel is threaded, and it is hard to make it flush Was this flywheel originally bolted to this crankshaft when you started or are you trying to bolt a new flywheel to this crankshaft? Either way if both are threaded it will not work. I have never seen both threaded. As James said the flywheel holes and the crankshaft holes will only line up one way. If you failed to mark everything as you disassembled then you must find the right combination before re-assembly can be completed correctly. Best to mark things before disassembly using a center punch, paint mark, or both. Quote
52concord Posted June 12, 2012 Author Report Posted June 12, 2012 (edited) it was originally bolted on the cranksshaft but then the bolts from the flywheel snapped when i was driving, and im replacing the bolts now, originally which has the thread? the crankshaft or flywheel? Edited June 12, 2012 by 52concord Quote
Don Coatney Posted June 13, 2012 Report Posted June 13, 2012 it was originally bolted on the cranksshaft but then the bolts from the flywheel snapped when i was driving, and im replacing the bolts now, originally which has the thread? the crankshaft or flywheel? Do you have a fluid drive car using a 4 bolt flywheel? The flywheel has the threads. Are you sure about that? Quote
Niel Hoback Posted June 13, 2012 Report Posted June 13, 2012 Hmmmmm,,,, never saw a threaded flywheel,,,,,,,,,,,, Quote
52concord Posted June 13, 2012 Author Report Posted June 13, 2012 its not a fluid drive its a 3sp manual Quote
52concord Posted June 13, 2012 Author Report Posted June 13, 2012 so i already got the flywheel on, just had to rotate it so it goes on right, it sits flush. maybe the 52 plymouths got threaded crankshaft flange and flywheel?? Quote
james curl Posted June 14, 2012 Report Posted June 14, 2012 If they are both threaded the same size how do you get the flywheel tight on the crankshaft flange? Quote
Don Coatney Posted June 14, 2012 Report Posted June 14, 2012 If they are both threaded the same size how do you get the flywheel tight on the crankshaft flange? Good question James! I awate a good answer. Quote
52concord Posted June 14, 2012 Author Report Posted June 14, 2012 hah i just tighten it as hard as i could, hopefully it holds up haha and i was thinking of putting a nut since theirs some bolt thread sticking out a little, just need to find one thats thin enough Quote
ptwothree Posted June 14, 2012 Report Posted June 14, 2012 How about posting a pic of the broken bolts?? I'm betting they are not the ones that are suppose to be there....Broken bolts suggests either the wrong size or strengh.. Quote
54Illinois Posted June 14, 2012 Report Posted June 14, 2012 The flywheel has threads protruding so the crank connects, then screw the nuts on...is that what he means? Quote
52concord Posted June 14, 2012 Author Report Posted June 14, 2012 The new bolts are a bit longer so they stick out a little more so i can put a nut on their, and thats what i was thinking that they are not stock bolts since im using 1/2-13 bolts, and stock are 7/16 bolts right?? Quote
Frank Elder Posted June 14, 2012 Report Posted June 14, 2012 This is why the last set of bolts snapped........both items cannot be threaded and maintain tightness....they will loosen as you drive.... Quote
52concord Posted June 14, 2012 Author Report Posted June 14, 2012 alright so in this situation what should i do? Quote
Don Coatney Posted June 14, 2012 Report Posted June 14, 2012 alright so in this situation what should i do? Follow this link and read everything. http://www430.pair.com/p15d24/mopar_forum/search.php?searchid=1262255 Quote
RobertKB Posted June 14, 2012 Report Posted June 14, 2012 I have not seen a single picture by the original poster. I cannot believe that both the flywheel and crankshaft flange are threaded. I believe on my car that there is no thread on either and specialty bolts are used with matching lock washers and nuts. Please post some pictures so the majority of us can understand your problem. As far as I am concerned, no one is going to be able to help you properly unless we see pictures. Quote
wayfarer Posted June 15, 2012 Report Posted June 15, 2012 OP indicates he is using ½-13 bolts... If the flange is tapped then there is minimal thread engagement, and very dangerous in my book...all factory flywheel bolts are fine thread. Also, if the flange has been tapped for the 13tpi then it cannot be properly/safely re-tapped for 20tpi. A ½" bolt will not fit through a stock flywheel or crank flange. I'll make a guess that the 'appearance' of both parts having threads is from using an undersized full threaded bolt and that the flywheel moved around and left 'thread-like' marks. YES, pictures are required. Quote
Frank Elder Posted June 15, 2012 Report Posted June 15, 2012 This thread is worthless without pictures. Quote
Don Coatney Posted June 15, 2012 Report Posted June 15, 2012 This thread is worthless without pictures. Hold on a minute, I did post some pictures. Quote
RobertKB Posted June 15, 2012 Report Posted June 15, 2012 Hold on a minute, I did post some pictures. Actually one, but I think most readers know we mean pictures by the original poster. Don, you do have lots of pictures that help a great deal on many threads, and it is nice you are willing to share them. Quote
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