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Old 06-13-2012, 12:21 AM   #21
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I am going to check more tomorrow while I have daylight. But to me it seems it has slipped. My jaw dropped when I saw how far my marks were off, made me thing my plugs were swapped or some odd end thing, but couldn't be because the car runs like a champ.

Joe, any suggestions on sites for a new pulley?
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Old 06-13-2012, 12:23 AM   #22
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HUSTLER WINS AGAIN!!!! Behold his glory.
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Old 06-13-2012, 12:25 AM   #23
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My pulley wobbles a tad bit but nothing I am concerned about.
...short nose failure happens on long noses too.
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Old 06-13-2012, 12:26 AM   #24
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You are on the other end of the glory hole hustler, because that was my first thought, you guys just made me 100% sure on my problem
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Old 06-13-2012, 12:27 AM   #25
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Joe, any suggestions on sites for a new pulley?
Well, I was going to say Rosenthal, but then I noticed how much they want for one.

Does anybody remember what year RicanRacer's car is? You could maybe just steal the crank pulley off of his engine.




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Old 06-13-2012, 12:28 AM   #26
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...short nose failure happens on long noses too.
I have always thought it didn't back when I owned my NB, I know it's not a NA engine but my readings made me believe it never happened. Those were in the spec miata days, I have joined the dark side? or whatever side you guys are on
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Old 06-13-2012, 12:31 AM   #27
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Well, I was going to say Rosenthal, but then I noticed how much they want for one.

Does anybody remember what year RicanRacer's car is? You could maybe just steal the crank pulley off of his engine.
Yeah I am on a budget as of right now, well I say budget but I plan to push this build throughout the year slowly buying parts/goodies. I blow all my paychecks on my car and my dirt track car so having 2 things running is tough. I am sure most of you guys can relate.
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Old 06-13-2012, 12:31 AM   #28
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... says the Man with Two Anuses.
Pm me for pics.
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Old 06-13-2012, 12:33 AM   #29
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Pm me for pics.
Pointless, I am sure your inbox is full already
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Old 06-13-2012, 12:36 AM   #30
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I have always thought it didn't back when I owned my NB, I know it's not a NA engine but my readings made me believe it never happened. Those were in the spec miata days, I have joined the dark side? or whatever side you guys are on
Its very common on pre 93 models however on our models it will still happen if the crank is not tightened properly. The pulley will be able to turn little by little and wear down the crank. On my 97 NA (had only 90k miles on the odometer) thats what happened. The crank was worn about an extra 1/8th where the keyway was and also the pulley was wobbling enough to the point where the belts would come off.
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Old 06-13-2012, 12:40 AM   #31
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Its very common on pre 93 models however on our models it will still happen if the crank is not tightened properly. The pulley will be able to turn little by little and wear down the crank. On my old NA thats what happened. The crank was worn about an extra 1/8th where the keyway was and also the pulley was wobbling enough to the point where the belts would come off.
Yeah it's been this way since I bought it, I have had the car since march now.

I need to find a good used one for a good price. I reused mine when I rebuilt my engine but I put a new woodruff key in, but it still slightly wobbles. The made sure I tightened the **** out of it but didn't want to get it to tight. Father thinks the crank wobbles until I told him the pulleys are known to go bad.
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Old 06-13-2012, 12:45 AM   #32
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You can try putting an indicator on the crank and seeing if it runs out. Also the center piece should still be running straight if the pulley it self is bad.
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Old 06-13-2012, 12:49 AM   #33
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I would figure if the crank was bad the pulley would still wobble when I raise my rpms, the pulley straightens out and seems normal when given some gas. Only at idle does it have that slight wobble to it
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Old 06-13-2012, 12:59 AM   #34
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Yeah, we need to remember that there are two very distinct failure modes here. The "short nose failure" is usually caused by the crank bolt being improperly torqued, and involves the keyway in the cambelt gear and / or pulley boss becoming deformed by the woodruff key. This can destroy not only the gear/boss, but also the crank itself.

Slippage of the pulley itself has no specific cause in negligence, it just happens as the stuff gets old. It causes no serious mechanical damage to the engine, you just wind up with a pulley that slips further and further out of true until it finally splits completely in half early one morning while you're merging onto the freeway in heavy traffic in the rain while running late for a court appearance.
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Old 06-13-2012, 01:12 AM   #35
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Yeah, we need to remember that there are two very distinct failure modes here. The "short nose failure" is usually caused by the crank bolt being improperly torqued, and involves the keyway in the cambelt gear and / or pulley boss becoming deformed by the woodruff key. This can destroy not only the gear/boss, but also the crank itself.

Slippage of the pulley itself has no specific cause in negligence, it just happens as the stuff gets old. It causes no serious mechanical damage to the engine, you just wind up with a pulley that slips further and further out of true until it finally splits completely in half early one morning while you're merging onto the freeway in heavy traffic in the rain while running late for a court appearance.
Do you think my pulley is really 180* out? Seems I need to replace it ASAP then, I don't want to risk that
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Old 06-13-2012, 01:23 AM   #36
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Yeah, we need to remember that there are two very distinct failure modes here. The "short nose failure" is usually caused by the crank bolt being improperly torqued, and involves the keyway in the cambelt gear and / or pulley boss becoming deformed by the woodruff key. This can destroy not only the gear/boss, but also the crank itself.
Right that's what i said. Short nose problem on a long crank.
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Old 06-13-2012, 01:37 AM   #37
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Hopefully my machinist has another one, he has a 1.8 short block sitting at his shop I am going to pickup from him i'll see about a pulley
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Old 06-14-2012, 09:17 PM   #38
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Somebody on here has an extra dampner pulley for you. It is an oft overlooked piece when cars and engines are parted out. Start asking people in the for sale section.

And yes, this is definitely the dark side. This forum has a bit of a reputation for both technical prowess and devilish insidiousness.
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Old 06-15-2012, 12:34 AM   #39
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Are all long nose 94-97 the same? Or do I need a 96/97 pulley?
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Old 06-15-2012, 12:59 AM   #40
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Same pulley for all engines '94 - '97.
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