Notices
Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by: KPower

Made a mistake while doing timing belt, need to figure out cam orientation

Thread Tools
 
Search this Thread
 
Old Feb 12, 2017 | 10:56 PM
  #1  
JD8's Avatar
JD8
Thread Starter
Junior Member
iTrader: (2)
 
Joined: May 2016
Posts: 277
Total Cats: -16
From: Maryland
Default Made a mistake while doing timing belt, need to figure out cam orientation

I am in the middle of my build (the engine is out of the car). While doing my timing belt I made sure to mark the old belt and cam gears in order to get the new belt oriented correctly. I made my mistake when I took the cam gears off to replace the cam seals. I did not realize there were 2 possible orientations for each cam gear (see picture). Since I did not pay attention to how the gears were on the cams, my marks are now meaningless and I have no clue what to do from here. I tried searching the miata forums and did not come up with anything.

Does anyone know how to get the gears back on correctly?




Thanks!
Old Feb 12, 2017 | 10:58 PM
  #2  
JD8's Avatar
JD8
Thread Starter
Junior Member
iTrader: (2)
 
Joined: May 2016
Posts: 277
Total Cats: -16
From: Maryland
Default

Just found this after a deeper search:

Originally Posted by fooger03
you cam GEARS are lined up, but are the cams themselves properly aligned within the gears? The little nub should be slotted in the "I" on the intake side, and the "E" on the exhaust side. Please confirm your crank is positioned correctly with respect to the cam gears as well.
Can anyone confirm?
Old Feb 12, 2017 | 11:23 PM
  #3  
Bronson M's Avatar
Senior Member
iTrader: (1)
 
Joined: Feb 2015
Posts: 1,109
Total Cats: 220
Default

Yep you got it...... 19 teeth between the strait up marks on the cams. Any guide to timing belt swaps would walk you through this without the need to mark anything.
Old Feb 12, 2017 | 11:52 PM
  #4  
Onyxyth's Avatar
Senior Member
iTrader: (2)
 
Joined: May 2013
Posts: 735
Total Cats: 62
From: Boyertown, PA
Default

Originally Posted by JD8
Just found this after a deeper search:



Can anyone confirm?
That's correct. It should also cause the "E" on the intake gear to point toward the raised line on the backplate. Same for the "I" on the exhaust gear.

See pics:


Old Feb 13, 2017 | 08:28 AM
  #5  
JD8's Avatar
JD8
Thread Starter
Junior Member
iTrader: (2)
 
Joined: May 2016
Posts: 277
Total Cats: -16
From: Maryland
Default

Thanks guys! I appreciate the help.




All times are GMT -4. The time now is 12:37 AM.