GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Cam install question for first timer

Thread Tools
 
Search this Thread
 
Old Aug 26, 2013 | 06:49 AM
  #1  
6.0l RST's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Dec 2011
Posts: 174
Likes: 0
From: MAINE
Default Cam install question for first timer

Building my lq9 and I realized after I tightened all the rockers it looks like when the lifters tightened on the loves of the cam it kicked over a tooth on the timig dots. Is that normal? Is that from just how the lobes of the cam are? This is my first time doing engine work so I'd just like some reasurence or to know if I gotta tear it all apart again.
Reply
Old Aug 26, 2013 | 11:18 AM
  #2  
Darknight-4's Avatar
On The Tree
iTrader: (6)
 
Joined: Mar 2006
Posts: 188
Likes: 0
From: Baton Rouge, LA
Post

I can't say this with 100% certainty, but as long as you had it dot to dot from cam gear to crank gear with chain installed and cam gear tightened down. I don't see the rockers/pushrods/lifters being able to mess that up.

So if you did rocker/pushrod/lifter torque down after finalizing the timing chain (cam gear torqued down with chain on it and crank), you should be fine.
Reply
Old Aug 26, 2013 | 05:22 PM
  #3  
RezinTexas's Avatar
TECH Fanatic
10 Year Member
 
Joined: Jun 2011
Posts: 1,292
Likes: 5
From: Houston
Default

when installing the rockers and torquing the bolts, the lifter MUST be on the base circle for that particular cylinder. It sounds like you didn't do that, and the force from the valve spring made the cam turn as you tightened down the rocker.
Reply
Old Aug 27, 2013 | 09:30 AM
  #4  
Evil Eric's Avatar
On The Tree
iTrader: (3)
 
Joined: Dec 2005
Posts: 157
Likes: 0
From: Black Mountain, KY
Default

did you turn the engine over again to make sure the timing marks are still aligned?
Reply
Old Aug 27, 2013 | 04:42 PM
  #5  
grey matter 04's Avatar
13 Second Truck Club
iTrader: (9)
 
Joined: Jul 2008
Posts: 1,455
Likes: 1
From: gonzales,LA
Default

if it was dot to dot with the timing chain on and cam gear torqued down then its fine.
You could always pop off the front cover and turn the motor over to make sure it lines back up dot to dot.
Also slack in the timing chain could make it not line up dot to dot

Last edited by grey matter 04; Aug 27, 2013 at 05:00 PM.
Reply
Old Aug 27, 2013 | 05:27 PM
  #6  
6.0l RST's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Dec 2011
Posts: 174
Likes: 0
From: MAINE
Default

fixxed it took it all apart a re-did everything. and its mint rotated the ingine twice and its still dot to dot, i think one of my buddies helping screwed it up
Reply
Old Sep 10, 2013 | 02:06 PM
  #7  
skaffy03's Avatar
On The Tree
 
Joined: May 2013
Posts: 161
Likes: 0
From: Ames, IA
Default

Too many beer breaks?
Reply
Old Sep 10, 2013 | 07:12 PM
  #8  
Blackpanther99's Avatar
TECH Senior Member
iTrader: (8)
 
Joined: Sep 2012
Posts: 6,958
Likes: 0
From: Baytown, TX
Default

Originally Posted by skaffy03
Too many beer breaks?
Common issue when buddies come over for help
Reply
Old Sep 10, 2013 | 11:04 PM
  #9  
skaffy03's Avatar
On The Tree
 
Joined: May 2013
Posts: 161
Likes: 0
From: Ames, IA
Default

I'll keep my eye out when I have my buddies help me with my cam swap lol... Whenever I get to it that is. Been hoping to find a good used one on here
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
The_W
GM Engine & Exhaust Performance
1
Oct 28, 2015 09:00 PM
all_individual
Eastern
6
Oct 10, 2015 10:09 PM
WICK3DxGATA
FORCED INDUCTION
4
Jul 21, 2015 06:59 PM
FlowmasterMufflers
GM Engine & Exhaust Performance
0
Jul 17, 2015 03:26 PM
all_individual
Silverado SS, Joe Gibbs Editions, SSR
1
Jul 13, 2015 11:01 AM




All times are GMT -5. The time now is 09:17 AM.