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Old 02-15-2008, 07:19 PM   #1
farrell
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Default stuck crank pulley

ok so i have an unorthodox racing lw crank pulley. it looks like the pre made notch in the pulley is much narrower then the notch on the crank gear looking thing. anyone know anything about this?
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Last edited by farrell; 02-15-2008 at 07:47 PM.
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Old 02-15-2008, 09:32 PM   #2
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wont go on or wont come off
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Old 02-15-2008, 09:40 PM   #3
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i can get it on. but im going to have to force it. the notch on the pulley is like this |_| but the nitch on the thing the pulley slides onto is like |____| so it wont go on with out forcing it. i dont care, but i have to set up the timing belt, so it may or may not be off a little bit

Last edited by farrell; 02-15-2008 at 09:47 PM.
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Old 02-15-2008, 10:58 PM   #4
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Well as a machinist I can tell you that the broach/keyway/slot in the unorthodox crank pulley is probably held to a tighter tolerance then the broach in the OEM Subaru pulley. There is also more then likely a heavy build up of anodizing on the unorthodox pulley in the keyway. Hit it up with a small file or some light sand paper, also use some anti-seize when you put the pulley on, it will help keep it from seizing to the shaft.
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Old 02-15-2008, 11:18 PM   #5
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yeah. what he said. and use a big hammer.
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Old 02-16-2008, 02:16 AM   #6
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ok but even if i do that how will i know exactly what tdc is? due to the fact that the notch in the pulley may be in the wrong spot
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Old 02-16-2008, 09:18 AM   #7
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You didn't mention it(which pulley) but unless it is a cam pulley or the crank shaft sprocket for the timing belt, as in it is just the front accessories pulley for the ac, ps, alt that many replace you don't have to do any thing with the timing.
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Old 02-16-2008, 10:49 AM   #8
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it is the CRANK pulley im speaking of. which does have a notch on it to help setup the timng belt. but the keyhole is not the right size. it was on my engine before, but i was not the one that installed it.
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Old 02-16-2008, 10:56 AM   #9
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just hit it with a torch till its cherry red, then smack it on with a large steel hammer.. i can't see how that wouldn't work...
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Old 02-16-2008, 11:03 AM   #10
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k, there are two pulleys on your crank.. one which drives the timing gears on your cams and one which drives the accessories. Unorthodox does not make timing pulley (sproket) as far as I can tell from their website products page. If your pulley was a crank driven timing pulley it would have some type of indexing on it so the belt could not slip. commonly the timing belt has teeth that fit into recessions on the pully. these recessions do NOT follow the circumference of the pully but go from the engine side to the front side. hard to explain. the accessory has a V-type or Poly V-type and the grooves on the pulley do follow the circumference of the pulley. im pretty sure you are making this way more complicated than it is. that keyway (notch as you call it) is only there to keep the accessory drive pulley from slipping on the crank, not for timing purposes whatsoever. And if it was once on your engine then it is physically impossible for the keyway to not fit the woodruff key on the crank unless the woodruff key grew or the keyway shrunk for some magical reason. or you changed the crank.

Last edited by RaceFaceXC; 02-16-2008 at 11:13 AM.
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Old 02-16-2008, 11:56 AM   #11
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i know it sounds complicated. its not. the crank pulley (the one that turns the belt) has a grove in it. for the keyway. the keyway on the piece with groove for the timiing belt is much bigger then the keyway notch in the pulley. i did not origionally put the pulley on myself so i was unaware of this. when i see the back of the pulley you can see that it was forced on.
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Old 02-16-2008, 01:30 PM   #12
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timing belt sprocket, I could be wrong but unorthodox does not make these to my knowledge. They are also not listed on their site.






Unorthodox crank pulley, drives accessory belts ac, ps, alt. and does not affect timing.


view 2





Unorthodox adjustable cam sprockets, does affect timing. Goes on the cams not the crank shaft.




Which do you have?? RaceFaceXC and I am not trying to be rude, I just think there is a mis understanding as to which pulley is being referred to. You said: "the crank pulley (the one that turns the belt) has a grove in it. for the keyway.", that doesn't help much since all pulleys turn a belt and have a keyway. Hope this helps to clear this up.

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Old 02-16-2008, 02:03 PM   #13
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He said it's the crank pulley in the first post...
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Old 02-16-2008, 02:33 PM   #14
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^^^ he also says it has a notch to set up timing in the 8th post. A crank pulley dose not affect timing.
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Old 02-16-2008, 02:40 PM   #15
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yeah, like me and flstffxe figured out, unorthodox only makes accessory drive pulleys, so to make this simple, make the keyway in your lw crank pulley fit the woodruff key on the crank and put it on. it has nothing to do with timing and will only go on one way so it cant make any difference anyhow. We can't make it any more simple and straight forward than that. if it was on once, it will go on again just use some common sense and do it already! if you still don't understand, have someone with some experience do it for you because you probably shouldn't be messing with it if you still don't know what your doing. i don't mean that to sound condescending just don't know how else to help you without doing it for you.
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Old 02-16-2008, 11:39 PM   #16
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just look at the pics.........i know its simple, but not in this case




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Old 02-17-2008, 09:12 AM   #17
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That pulley wont affect the timing at all. The key in the slot on the crank does hold both pulleys from slipping, BUT the crank sprocket(timing belt sprocket, cogged one) has its own slot to go over the key and is not affected by the slot on the crank pulley. They may sit on the same shaft and share a key but they are still independent of each other. You could rotate the crank pulley how ever you wanted and the cogged timing belt sprocket will still be in the same spot. The crank pulley only drives the ac, ps and alt. and is not used for any thing related to the timing.

As far as the slot goes in your crank sprocket, Your right it looks as if the installer slid the pulley on and just torqued the bolt down forcing the key to cut its own groove. Being the damage is already done I would just put it on using the groove made when it was forced on. The right thing to do would have been for them to file the groove or get the right pulley.

Once you put the timing belt on you will see what we mean when we say the crank pulley is not part of the timing set up.
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Old 02-17-2008, 10:23 AM   #18
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i give up.
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Old 02-17-2008, 11:01 AM   #19
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^^^patience.
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Old 02-17-2008, 02:59 PM   #20
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im not sure if suby's do this but in some makes the woodruff key's aren't fixed, like you can pull them out.. make sure its uniform on both ends, because if you took it out and put the wrong side up its possible that its bigger at the bottom than top and now the pulley wont fit.. other than that its gotta be another issue if it fit before, nothing changed, and now it wont...
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Old 02-17-2008, 03:23 PM   #21
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i would immediately just file it down a little at a time. especially if it was forced on before. i'd have that thing on in a bout 2 minutes.
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Old 02-17-2008, 05:49 PM   #22
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k i got it. thanks guys. sorry for the confusion
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Old 02-17-2008, 06:05 PM   #23
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Quote:
Originally Posted by farrell View Post
it is the CRANK pulley im speaking of. which does have a notch on it to help setup the timng belt. but the keyhole is not the right size. it was on my engine before, but i was not the one that installed it.
It sounds like whomever installed it pounded it on and made a new keyhole in it. It's soft aluminum and I have seen it happen before.

We had to pull one off when doing a motor swap, be super careful as you can crack the front engine cover really easy when using a crowbar or hammer.

WD40 into the hole and alot of brute force to pull it back off.
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Old 02-17-2008, 08:19 PM   #24
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not a problem
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