RX7Club.com


Go Back   RX7Club.com > Tech and Performance > General Rotary Tech Support
Sign in using an external account
Register Forgot Password?
Register Photos FAQ Members Search Today's Posts Mark Forums Read Used CarsVendors TSB & Recalls Garage
Welcome to RX7Club.com

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 04-24-07, 12:00 AM   #1
All out Freak!
5 Year Member
 
K-Tune's Avatar
 
Trader Score: (14)

Join Date: Jul 2003
Location: Gulf Breeze, FL
Posts: 2,859
eccentric shaft play *thunk thunk*

ok..just undid the front eccentric bolt, and now there's an audible *thunk* when the shaft moves its 1/8th of an inch or so back and forth.

is there something wrong? does it need more torque on the front shaft bolt? (i put it back on, still the same amount of play) it didnt seem to do this before i undid that front bolt...
K-Tune is offline   Reply With Quote
Old 04-24-07, 01:05 AM   #2
No Sleep, No Food
5 Year Member
 
Rx-7Doctor's Avatar
 
Trader Score: (13)

Join Date: Jul 2004
Location: Oregon
Posts: 10,603
Did you block the clutch pedal in the depressed position before you undid the bolt?
Rx-7Doctor is offline   Reply With Quote
Old 04-24-07, 01:34 AM   #3
All out Freak!
5 Year Member
 
K-Tune's Avatar
 
Trader Score: (14)

Join Date: Jul 2003
Location: Gulf Breeze, FL
Posts: 2,859
engine out of car when i undid it.
K-Tune is offline   Reply With Quote
Old 04-24-07, 08:03 AM   #4
Insane Burnout
 
Trader Score: (2)

Join Date: Dec 2005
Location: Wauwatosa Wisconsin
Posts: 266
With what you have said here is a very good GUESS at what happened.

Behind the bolt you too out there is a needle bearing & one or two thrust washers. When the bolt is taken out with the e-shaft horizontal like the position the motor is when it's in the car the thrust washer & needle bearing slips forward on the e-shaft & drops down on a smaller diameter of the e-shaft. When you take it apart to & reassemble look at ALL the part svery close because when you tightened the bolt you could have gougded/screwed up the parts.

If you try a workshop manual or enter the mazdatrix site there is a workup on the issue I described so that the needle bearing & thrust washer don't drop dpwn on the smaller diameter.
David Dewhurst is offline   Reply With Quote
Old 04-24-07, 11:12 AM   #5
No Sleep, No Food
5 Year Member
 
Rx-7Doctor's Avatar
 
Trader Score: (13)

Join Date: Jul 2004
Location: Oregon
Posts: 10,603
You now have to remove the front cover in order to fix the problem. This can be done in the vehicle.
Rx-7Doctor is offline   Reply With Quote
Old 04-24-07, 11:45 AM   #6
Say NO to aux. bridging!
10 Year Member
 
rotarygod's Avatar
 
Trader Score: (1)

Join Date: Jul 2002
Location: Houston
Posts: 4,087
If the engine is out, fix it now. It is not easy to remove a front cover or even the oil pan while the engine is in the car. Yes it can be done but the odds of you getting it to not leak when you reassemble it are much higher than if you just fix it while the engine is out. I had the thrust bearing fall off like that once and to save time I removed the engine to fix it. It's not easy to do in the car.
rotarygod is offline   Reply With Quote
Old 04-24-07, 04:14 PM   #7
No Sleep, No Food
5 Year Member
 
Rx-7Doctor's Avatar
 
Trader Score: (13)

Join Date: Jul 2004
Location: Oregon
Posts: 10,603
If you have it back in the car now I have a thread on how to remove the cover. It is not as bad as you think.
Rx-7Doctor is offline   Reply With Quote
Old 04-25-07, 03:19 PM   #8
707
 
RX7 allnight's Avatar
 
Trader Score: (0)

Join Date: May 2004
Location: Santa Rosa Ca
Posts: 854
Send a message via AIM to RX7 allnight
ouch! End play = standard .0016-.0028 max = .0035 to much end play.. install bigger spacer.. to little end play get smaller spacer or flat sand the same one.
RX7 allnight is offline   Reply With Quote
Old 04-25-07, 03:52 PM   #9
No Sleep, No Food
5 Year Member
 
Rx-7Doctor's Avatar
 
Trader Score: (13)

Join Date: Jul 2004
Location: Oregon
Posts: 10,603
Quote:
Originally Posted by RX7 allnight
ouch! End play = standard .0016-.0028 max = .0035 to much end play.. install bigger spacer.. to little end play get smaller spacer or flat sand the same one.
Has nothing to do with installing a spacer. He did not follow the procedure to ensure that the torrington bearings would not drop out of place when removing the front pulley.
Rx-7Doctor is offline   Reply With Quote
Old 04-25-07, 07:08 PM   #10
I wish I was driving!
10 Year Member
 
Trader Score: (0)

Join Date: Dec 2001
Location: BC, Canada
Posts: 4,964
Send a message via AIM to scathcart
umm... when the torrington bearing gets crushed by the spacer, endplay goes to zero, it doesn't get larger.
I agree that he needs to remedy this problem by restacking the front assembly, but I don't think the torrington bearing will be pinched.
scathcart is offline   Reply With Quote
Old 04-28-07, 05:41 AM   #11
WWFSMD
 
maxcooper's Avatar
 
Trader Score: (0)

Join Date: Jun 2001
Location: SoCal
Posts: 5,035
I'm not totally sure why, but you do end up with a bunch of end play when the bearing slips out of place. I know this from first-hand experience. This was from my engine:
http://mazdatrix.com/faq/pulley.htm

-Max
maxcooper is offline   Reply With Quote
Old 04-28-07, 06:44 AM   #12
Gone Race'n
10 Year Member
 
moremazda's Avatar
 
Trader Score: (4)

Join Date: Dec 2001
Location: Rockford, IL
Posts: 1,541
You said the motor was out of the car..... Is there a flywheel on the motor??
moremazda is offline   Reply With Quote
Old 04-28-07, 06:44 AM
RX7Club
Mazda RX7




Paid Advertisement


 
 
 
Reply

Tags
bearing, bolt, cracked, eccentric, lots, play, rx7, shaft, sitenopistonscom, thrust, washer

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 12:49 PM.
All content Copyright © 2007 by Internet Brands, Inc.

Contacts

SEO by vBSEO ©2010, Crawlability, Inc.