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Old 05-02-2011, 04:14 PM   #1
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Angry Pulley Wobble on my fully built motor!!

So I bought a fully built miata with a built motor for 5300. what I come to find out after a little research is that ... I have the wobble of doom! I had a buddy of mine do the loctite method and retighten all the bolts... Still has the wobble. When we went to put the hub back on it had alot of play in there. though the woodruff key was in good condition.

Where do I go from here?
New Crank?! =[

P.s The giuy has about 10 grand in the motor. so tossing this motor would be a big no!no!

Last edited by Thirdlife911; 05-02-2011 at 07:32 PM.
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Old 05-02-2011, 04:25 PM   #2
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From the video u posted there isn't a huge wobble at all...

Not gonna lie, mine has a little wobble, very small and everything is brand new...I'm not worried about it.

STOP BEING A ***** AND STICK TO YOUR LAST THREAD
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Old 05-02-2011, 04:26 PM   #3
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More details.
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Old 05-02-2011, 04:29 PM   #4
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Old 05-02-2011, 04:32 PM   #5
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More Details? what more can I saw it has a bad wobble on the crank pulley. It's worse at lower RPM's

Preluding : My camera is bad quality and the pulley is spinning to fast for the camera to pick up the wobble, so all you see is it spinning normal. I'm not trying to blow this motor.
Though as I did say in my previous thread. I am going to replace everything except the Crank as soon as I can find where to get those hubs.
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Old 05-02-2011, 04:34 PM   #6
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Put on new pulley. See if that fixes it. Wobble pully bad.

Also see if pushing in clutch and pry barring the pully moves it at all. (Crank walk test)
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Old 05-02-2011, 04:52 PM   #7
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Quote:
Originally Posted by Thirdlife911 View Post
More Details? what more can I saw it has a bad wobble on the crank pulley. It's worse at lower RPM's

Preluding : My camera is bad quality and the pulley is spinning to fast for the camera to pick up the wobble, so all you see is it spinning normal. I'm not trying to blow this motor.
Though as I did say in my previous thread. I am going to replace everything except the Crank as soon as I can find where to get those hubs.
Listen to Faeflora and follow his directions as well as mine from the last thread.

Its odd that the pulley is loose going on, mine (97) was a very very tight fit and I actually need a small pry bar to slowly wedge it off once its all together.
You're motor could have been assembled with non matching pulleys and bosses from different year cars maybe... highly doubt that your crank is fawked though.

Last edited by Preluding; 05-03-2011 at 08:35 AM.
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Old 05-02-2011, 06:43 PM   #8
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You need this thread, complete with awesome close-up pictures:
https://www.miataturbo.net/showthrea...ghlight=pulley

Check to make sure the bolts are tight... hopefully that's all that is wrong.
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Old 05-02-2011, 06:54 PM   #9
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Did you mean to double-post this? Ask a mod to delete.
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Old 05-02-2011, 07:18 PM   #10
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Most likely the problem is not the key but the key way on the crank. It has probably been damaged so that the woodruff key does not fit snugly in the crank. Replace the crank and bearings and the problem is solved.

Note, I am assuming that you are dealing with a small nose crank engine.
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Old 05-02-2011, 07:31 PM   #11
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the motor is the 94 1.8L. I believe it is the long nose.
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Old 05-02-2011, 07:45 PM   #12
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I would still look at the keyway in the crank nose. If that looks good set up a dial indicator and check for runout, If that is good then it's the balancer
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Old 05-02-2011, 08:44 PM   #13
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Well for some stroke of random luck. the wobble stopped. So random... that is blows my mind. It wobbled right after i torqued the bolts back on and started it up. Then I drove it home though i was beating on it pretty hard because I was just over the top mad because i thought i was gonna need to rebuild the bottom end. So when i got it home and checked it... No wobble..... Just in awhh right now.
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Old 05-02-2011, 09:21 PM   #14
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WOBBLE OF DOME!!!!!

$10k in the engine? Yeah right. I love fucksticks who throw figures like that around not knowing that the people who really know these cars are laughing at them.
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Old 05-02-2011, 09:25 PM   #15
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Old 05-02-2011, 09:34 PM   #16
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Ok Doppel... please read this list and then tell me there's not over 10k in the car..Fuckstick
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Old 05-02-2011, 09:34 PM   #17
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94 Motor Balanced and Blueprinted
JE Custom Turbo Pistons with 9:1 Compression & 1mm Overbore
Crower H Rods
All ARP Bolts (every thing)
Ported & Polished Head
1mm Oversized Valves Black Nitrate Coated
Bronze valve guild's
HKS Cams, HKS Cam Gears
FMIV Turbo Manifold
Garret Double bearing turbo gt3071r 4" inlet polished
Custom down pipe 3" manderal bent with Vband
External .Tail wastegate
Custom Front Mount Intercooler with HKS Core
Tial Blow Off Valve
Ported & Polished Intake Manifold
Koyo Racing Radiator
Dual fan's 12's
Vishnu Fuel Rail
550cc Injectors Rc injector's
255 Walboro Fuel Pump
Link Engine Management System w/ Laptop Hookup
Custom 3” Exhaust with vibrant muffler
Stage III ACT Racing Clutch
Aluminum FlyWheel (Flyin Miata)
Torsien II Limited Slip Rear End
Flyin Miata Front Adjustable Sway Bar
Flyin Miata Rear Adjustable Sway Bar
Koni Adjustable Front and Rear Struts
Eibach Sports springs
Poly Master Bushing Kit
Brembo Rotors
Polish Accessories
Digital Dyno Tune Gauges (Digital)
WideBand o2
Boundary Engineering High Flow Oil Pump
Exterior
Black Metallic with Red Pearl Overcast Custom Paint Job
Race Beat Body kit
RaceBeat Turn Signal Intakes
California Miata Toneau
17"x7.5" Wheels and 15" Racing wheel's
Moss Motors Cloth Convertible Top
Carbon Fiber Tail Lights
Gilled Light Weight Hood
Custom Lazy Eye kit Functional.
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Old 05-02-2011, 09:53 PM   #18
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I guess that makes two of us with the wobble, I am going to try and take care of mine tommorw. Its not crank walk because there is no play in the Pulley but it just wobbles on its own and when i rev it I can no longer tell. Hopefully its just the pulley and no other issues
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Old 05-02-2011, 10:03 PM   #19
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Let me help you with that list. 10k in motor or 10k in car, pick a story.

Quote:
Originally Posted by Thirdlife911 View Post
94 Motor Balanced and Blueprinted
JE Custom Turbo Pistons with 9:1 Compression & 1mm Overbore
Crower H Rods
All ARP Bolts (every thing)
Ported & Polished Head
1mm Oversized Valves Black Nitrate Coated
Bronze valve guild's
HKS Cams, HKS Cam Gears
FMIV Turbo Manifold
Garret Double bearing turbo gt3071r 4" inlet polished
Custom down pipe 3" manderal bent with Vband
External .Tail wastegate
Custom Front Mount Intercooler with HKS Core
Tial Blow Off Valve
Ported & Polished Intake Manifold
Koyo Racing Radiator
Dual fan's 12's
Vishnu Fuel Rail
550cc Injectors Rc injector's
Custom 3” Exhaust with vibrant muffler
WideBand o2
Boundary Engineering High Flow Oil Pump
still gotta agree with the doppler effect.
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Old 05-02-2011, 10:22 PM   #20
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Quote:
Originally Posted by Thirdlife911 View Post
P.s The guy has about 10 grand in the motor. so tossing this motor would be a big no!no!
Quote:
Originally Posted by Thirdlife911 View Post
94 Motor Balanced and Blueprinted
JE Custom Turbo Pistons with 9:1 Compression & 1mm Overbore
Crower H Rods
All ARP Bolts (every thing)
Ported & Polished Head
1mm Oversized Valves Black Nitrate Coated
Bronze valve guild's
HKS Cams, HKS Cam Gears
So there's the built engine mods. Sounds like about $2000ish on the top end.

Let me guess, you're also making 400WHPzzzzzzzzzzzzz!!!

I'm glad your wobble went away. Maybe it's just about ready to break off. My crank broke off the first motor I had.
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