Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > General Miata Chat
Reload this Page >

Can't turn camshaft sprocket by hand .. normal ?

General Miata Chat A place to talk about anything Miata

Can't turn camshaft sprocket by hand .. normal ?

 
Old 06-07-2018, 04:21 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Aug 2016
Posts: 303
Total Cats: 2
Default Can't turn camshaft sprocket by hand .. normal ?

Dropped my extra VVT head to a local 'head only' machine shop last week and just got it back today.
I asked them to deck it, hot tank, swap out stem seal, swap out oem spring to supertech heavy double.

Feels like such an obvious thing to do now, but I didn't check if the cam shaft could spin freely by itself with just hand pressure before I dropped it off. With the motor attached and timing belts connected however, I remember I was able to easily turn the entire assembly via the crank shaft bolt.

Is it normal that I can't spin the camshaft via the sprocket by hand esp with the heavy double spring ? I thought maybe they over torqued the cap bolts so I undid all and re-torqued it to only 100 in lb.using the correct pattern but no luck.
phocup is offline  
Old 06-07-2018, 11:50 AM
  #2  
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 2,007
Total Cats: 53
Default

I can't turn my sprockets by hand, but you should be able to with a wrench and socket on the cam gear bolt, and I've got stock springs.

Does it look like any of the springs are binding (coils touching?)
Stealth97 is offline  
Old 06-07-2018, 12:40 PM
  #3  
Junior Member
Thread Starter
 
Join Date: Aug 2016
Posts: 303
Total Cats: 2
Default

Cool, thanks for letting me know. I didn't want to force it with a wrench so I took things apart to double check torque values and to verify if its supposed to be able to turn or not. I'll double check for coil binding today.
phocup is offline  
Old 06-18-2018, 02:19 PM
  #4  
Junior Member
 
Join Date: Jul 2017
Posts: 66
Total Cats: 3
Default

+1 on wrench required to turn cam gears! Its the resistance from lobes pressing valve springs!
2jz_mickey is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
deezums
General Miata Chat
5
02-09-2015 06:56 PM
jspadaro
General Miata Chat
10
08-25-2014 11:44 AM
6strngs
Engine Performance
0
10-15-2013 05:29 PM
psiturbo
Engine Performance
29
06-24-2013 09:01 AM
Y284nbh
DIY Turbo Discussion
28
01-09-2013 05:57 PM


Thread Tools
Search this Thread
Quick Reply: Can't turn camshaft sprocket by hand .. normal ?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.