Pulley Wobble on my fully built motor!! - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 05-04-2011, 12:57 PM   #41
Elite Member
iTrader: (12)
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,868
Total Cats: 66
Default

Quote:
Originally Posted by Thirdlife911 View Post
Yhe Doppel please I would be glad to hear your 2 cents.
Sorry, but my analyitical skills and time are worth more than $0.02.
Doppelgänger is offline   Reply With Quote
Old 05-04-2011, 01:29 PM   #42
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Quote:
Originally Posted by Der_Idiot View Post
Whatever you do, don't let pulley hit block.



You go to burning man? We need to hang out some time
Oooh a fellow burner!

I actually just saw shpongle last night. Decent number of burners there.
Faeflora is offline   Reply With Quote
Old 05-05-2011, 08:13 AM   #43
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

When I pull out all of the parts from the pulley boss to the harmonic balancer to put the new parts in. Would it be a bad idea to put a lightweight aluminum pulley on? I was planning on shaving off the small side of the pulley with a precision machine ( The part of the pulley that was used for powersteering and A/c. also upon piecing everything back together find where the top and bottom difference of the wobble and with the precision machine. Shave the pulley so that it will counter the wobble and be straight as possible. Sound good?
Thirdlife911 is offline   Reply With Quote
Old 05-05-2011, 08:17 AM   #44
Elite Member
iTrader: (12)
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,868
Total Cats: 66
Default

I wouldn't modify the pulley. I'd try getting a new/low mile pulley and a new woodruff key and go from there. Avoid the "under drive" or lightweight pulleys too as they don't dampen the frequencies that like to shatter oil pumps. If you ever get a hold of an ATI damper, you'll notice that it's heavier than stock...for good reason...better dampening. The wobble is caused by improper installation of the pulley and excessive clearence between the pulley, key and keyway....generally not the pulley itself unless the rubber inside has degraded (in which it would be time to replace it anyway). When you take it off, make sure there is no damage/wollowing to they keyway on the crank.

Here is an example of wollowing that causes wobble-







On my 96, someone did the timing belt wrong and I had a bit of a wobble, didn't think it was that bad and let it go. About a year later it bit me in the *** when the pulley fell off while driving. The keyway was pretty bad and the key was trashed. I was working at a Toyota dealership at the time and had it towed in and got to work on it. My fix ended up being to take a woodruff key from a Toyota V8 sitting in the scrap pile and shaving it down to fit...also had to take a file to the pulley a bit to widen its keyway to accept the slightly wider key. Put it back together and the bitch was smoother than how it came from the factory.
Doppelgänger is offline   Reply With Quote
Old 05-05-2011, 08:34 AM   #45
Senior Member
iTrader: (10)
 
Join Date: Aug 2007
Location: Fredericton, NB
Posts: 1,187
Total Cats: 4
Default

Quote:
Originally Posted by Thirdlife911 View Post
...Would it be a bad idea to put a lightweight aluminum pulley on? ...
It would be a very VERY bad idea. Aluminum pulleys have no rubber insert and therefore send A LOT of vibration and don't absord ****.

It would garantee a blown motor and/or oil pump.

Listen to Doppelgänger, he speaks the truth and you owe him more then 2 cents for that kind of response.
Preluding is offline   Reply With Quote
Old 05-05-2011, 08:35 AM   #46
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

Wow that crank nose has a terrible bend to it. I guess I won't know how bad it is until I open it up ( When the parts are in ) . Lets say the mine is bent that bad. Would there be any way to make it straight?
Thirdlife911 is offline   Reply With Quote
Old 05-05-2011, 08:36 AM   #47
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

Quote:
Originally Posted by Preluding View Post
It would be a very VERY bad idea. Aluminum pulleys have no rubber insert and therefore send A LOT of vibration and don't absord ****.

It would garantee a blown motor and/or oil pump.

Listen to Doppelgänger, he speaks the truth and you owe him more then 2 cents for that kind of response.
Lol, yeah he does know his stuff
Thirdlife911 is offline   Reply With Quote
Old 05-05-2011, 08:46 AM   #48
Elite Member
iTrader: (12)
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,868
Total Cats: 66
Default

The chances of the end of a crankshaft being bent are slim to none. It's always caused by an improperly installed pulley and/or damage to the key and keyway. The bend you're seeing is likely an optical illusing caused by the shadow of the flash of the camera.
Doppelgänger is offline   Reply With Quote
Old 05-05-2011, 10:58 AM   #49
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

Ok, if the crank is not bent what would be the reason that people are saying i need to replace the entire crank? My friend who also has a turbo'd miata was telling me that i'm gonna need an entire new bottom end because the crank is trashed.

Is he just blowen smoke?
Thirdlife911 is offline   Reply With Quote
Old 05-05-2011, 11:23 AM   #50
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

Quote:
Originally Posted by Thirdlife911 View Post
Ok, if the crank is not bent what would be the reason that people are saying i need to replace the entire crank? My friend who also has a turbo'd miata was telling me that i'm gonna need an entire new bottom end because the crank is trashed.

Is he just blowen smoke?
Ok, it's obvious that you don't know what you're talking about at all, and you're insisting to make this harder then it should be. You've been told what is wrong, and what you need to do to fix it. Just stop thinking and do it.
dustinb is offline   Reply With Quote
Old 05-05-2011, 11:24 AM   #51
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

This is a mechanical issue. IF you can make the pulley and key sit in the crank keyway without any play, you won't have to pull your motor. A fix like doppelganger's could work, so might loctite etc.

Post pics of your crank nose, the center of your pulley, and the key.
Faeflora is offline   Reply With Quote
Old 05-05-2011, 07:37 PM   #52
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Its not "bent" its worn out more so on one side than it is on the other because the pulley was able to rotate few degrees each way each time you step and let go of the gas carving its way into the crank. On my NA it was the same way (ended up trading it in at the dealer). The proper way to fix it other than replace the crank would be to pull the crank, take .020-.040 cut off of it, get that **** welded all around. Toss it on a high precision grinding machine and grind it down to size then mill out another keyway. Another way would be to add a hardened sleeve instead of welding it.
triple88a is offline   Reply With Quote
Old 05-05-2011, 10:30 PM   #53
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

**** that. JBweld the ******* key and the ******* damper to the ******* crank and win like motherfucking hell.
Faeflora is offline   Reply With Quote
Old 05-05-2011, 10:46 PM   #54
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 2,894
Total Cats: 109
Default

Before thinking about it too much, pull the damn pulley and see what is going on. What ever you do, do not do something stupid like ripping the engine because you are pissed to blow it up. You supposedly have high dollar parts in that motor.

If you blow it up, you could hurt pistons, rods and cylinder head. That means you have to start over which would cost thousands to get what you have right now. Replacing the crank, if you have to, will really not be that big of a deal considering what you already have. But you need to see what is really going on first.

If you have to replace or fix the crank, at least you will have the opportunity to see if in fact you have all of the high dollar parts that the seller claimed to have. I would be somewhat suspicious, you got it pretty damn cheap for what it 'supposedly' has. Aren't you curious?
miata2fast is online now   Reply With Quote
Old 05-05-2011, 11:05 PM   #55
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,353
Total Cats: 1,322
Default

Quote:
Originally Posted by Faeflora View Post
His parts list looks similarish to mine.

BUT HOLY **** WHAT IS THI S??

Garret Double bearing turbo gt3071r


Where did you get the double bearing option?? That is meant for MAX performance!!!!! Very rare, difficult to acquire!!! !!!
All GT-series turbos are dual ball bearing.
Savington is offline   Reply With Quote
Old 05-05-2011, 11:06 PM   #56
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,353
Total Cats: 1,322
Default

Also, 53 ******* posts and we still haven't just pulled the crank pulley to examine the crankshaft?
Savington is offline   Reply With Quote
Old 05-05-2011, 11:45 PM   #57
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

Lmfao, Yeah Ik I ordered all of my parts and I don't wanna take everything apart for ***** and giggles. The parts should be in by monday or tuesday so I will keep you guys updated. Also when I replace the crank boss. Do I need to be extra careful not to throw off the timing or does the woodruff key keep everything lined up
Thirdlife911 is offline   Reply With Quote
Old 05-05-2011, 11:51 PM   #58
I'm Miserable!
Thread Starter
 
Join Date: Apr 2011
Location: port st lucie, FL
Posts: 59
Total Cats: 0
Default

I do appreciate everyones input. I feal like buying this car that I skipped a lot of steps in building my first car to something actually fast.
Thirdlife911 is offline   Reply With Quote
Old 05-06-2011, 01:02 AM   #59
Elite Member
iTrader: (12)
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,868
Total Cats: 66
Default

You have a metric fuckton of **** to learn about how a car works. Clearly you aren't ready to do such work and not expect a mistake. Sorry, but that's the way I see it right now. I posted pictures of a crank and explained what caused the wobble and you can clearly see it in the pictures...yet you still can't identify what the problem is even looking at a known bad part as a big, giant picture. A wollowed crankway (do you even know what that means?) is perminant damage to a part that can't just be taken out without taking apart the entire engine. There are temp. "fixes" that aren't guaranteed to work, but may hold up for a long time if done right.

You should have bought a stock car and gone from there so that by the time you're ready for a built engine and turbo, youll halfway understand what you're looking at.
Doppelgänger is offline   Reply With Quote
Old 05-06-2011, 01:21 AM   #60
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Quote:
Originally Posted by Thirdlife911 View Post
Lmfao, Yeah Ik I ordered all of my parts and I don't wanna take everything apart for ***** and giggles. The parts should be in by monday or tuesday so I will keep you guys updated. Also when I replace the crank boss. Do I need to be extra careful not to throw off the timing or does the woodruff key keep everything lined up
You're fucked game over. I don't know what I am doing either but **** I have learned enough in 2011 to know you're fucked.

I sincerely recommend you recruit some local help since you are not heeding or reading anything anyone has posted here. The world needs more high hp miatas so I don't want to see yours die.

Quote:
Originally Posted by Doppelgänger View Post
You have a metric fuckton of **** to learn about how a car works. Clearly you aren't ready to do such work and not expect a mistake. Sorry, but that's the way I see it right now. I posted pictures of a crank and explained what caused the wobble and you can clearly see it in the pictures...yet you still can't identify what the problem is even looking at a known bad part as a big, giant picture. A wollowed crankway (do you even know what that means?) is perminant damage to a part that can't just be taken out without taking apart the entire engine. There are temp. "fixes" that aren't guaranteed to work, but may hold up for a long time if done right.

You should have bought a stock car and gone from there so that by the time you're ready for a built engine and turbo, youll halfway understand what you're looking at.
Dude as I said JBWELD will make it all better. Also make sure to JBWELD the pully to the snout. Also JBWELD the crank bolt into the crank hole. Also JBWELD the timing belt to the sprocket that way you will not have to retime the engine.



Quote:
Originally Posted by Savington View Post
All GT-series turbos are dual ball bearing.
Faeflora is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:18 PM.