Series Timing Questions What the heck - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Series Technical Discussions


Reply
 
Thread Tools
  #1  
Old June 26th, 2011, 02:32 AM
bstraw's Avatar
bstraw
Status: Offline
Byron Straw
1994 POE/ST
Member
 
Join Date: Feb 2006
Location: Fort Collins, CO
Posts: 301
Series Timing Questions What the heck

So I have been reading the "green bible" about timing the 2.25 without front marks as I am putting in a new 2.5 cam. In a book that deals with tolerances of one thousands of inches, I am stumped at this. Please see the photo I posted at (https://picasaweb.google.com/byron.s...07884092503026) to understand what I am talking about, you may need to click the "full screen" tab to be able to read it. Ok, here is what I do not understand; let's start with #8 in the photo. "turn the camshaft in the direction of rotation until the rocker pad has nearly opened the valve fully." What the heck, WHAT DOES NEARLY OPENED mean. How do I know when to stop? Additionally, is the point of the operation to get the #1 exhaust valve fully open? If you have a dial indicator, why would you need to go through the NEARLY fully opened option. My "nearly opened" may be different than the next guy's so how does this method make sense when you are just trying to find the maximum (open-ness) of the #1 ex. valve. Am I completely missing something here? Am I just dumb , or can I just use the dial indicator to set the #1 ex. rocker to the maximum full position and then set the crank, and then put the chain on? Sorry for the confusion but I do not want to take the front cover off after I have the motor in. I have looked at the "Land Rover FAQ" and I am still confused. Why would they say "Nearly." Ahhhhhhhhhhhh!
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old June 26th, 2011, 06:25 AM
Wolf Fabrication's Avatar
Wolf Fabrication
Status: Offline
Sterling Archer
'08 D3
D-90 Source Vendor
 
Join Date: Sep 2007
Location: Oahu, HI
Posts: 7,453
Registry
Quote:
Originally Posted by bstraw
So I have been reading the "green bible" about timing the 2.25 without front marks as I am putting in a new 2.5 cam. In a book that deals with tolerances of one thousands of inches, I am stumped at this. Please see the photo I posted at (https://picasaweb.google.com/byron.s...07884092503026) to understand what I am talking about, you may need to click the "full screen" tab to be able to read it. Ok, here is what I do not understand; let's start with #8 in the photo. "turn the camshaft in the direction of rotation until the rocker pad has nearly opened the valve fully." What the heck, WHAT DOES NEARLY OPENED mean. How do I know when to stop? Additionally, is the point of the operation to get the #1 exhaust valve fully open? If you have a dial indicator, why would you need to go through the NEARLY fully opened option. My "nearly opened" may be different than the next guy's so how does this method make sense when you are just trying to find the maximum (open-ness) of the #1 ex. valve. Am I completely missing something here? Am I just dumb , or can I just use the dial indicator to set the #1 ex. rocker to the maximum full position and then set the crank, and then put the chain on? Sorry for the confusion but I do not want to take the front cover off after I have the motor in. I have looked at the "Land Rover FAQ" and I am still confused. Why would they say "Nearly." Ahhhhhhhhhhhh!
That's quite common when building motors. I read that at setting the cam lobe right before it's apex on the exhaust valve. There is really no way to put a measurement on this due to varying tolerances on parts.
__________________
"The most unreliable car in the world is the most reliable car in the world." -Jeremy Clarkson refering to the Range Rover


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Semper Fi!
Reply With Quote
  #3  
Old June 26th, 2011, 09:06 AM
kevkon's Avatar
kevkon
Status: Offline
kevin
1994 D90 300tdi #730, SIII 88
Member
 
Join Date: Nov 2009
Location: chester,nj
Posts: 673
The way to find absolute TDC is to go in one direction until movement has stopped make a mark, then rotate in the opposite direction and make a mark. Halfway between those two marks is tdc.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old June 27th, 2011, 12:36 PM
slorocco
Status: Offline
Dan Prasada-Rao
1963, 109 Station Wagon
Member
 
Join Date: Oct 2004
Location: Great Mills, MD, USA
Posts: 930
Quote:
Originally Posted by kevkon View Post
The way to find absolute TDC is to go in one direction until movement has stopped make a mark, then rotate in the opposite direction and make a mark. Halfway between those two marks is tdc.

X2, that's how I've done it.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Series Technical Discussions

Tags
series

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Odd, Rare, and heavy Series Stuff FS "NOS" SafariHP For Sale - Parts 8 May 12th, 2012 12:15 PM
Series III Questions CMS3900 Series Technical Discussions 3 February 12th, 2011 10:22 PM
Series III Import Questions TanzaniaSafari Series Technical Discussions 2 February 3rd, 2009 12:26 AM
Ing timing? Series III. oldgreentrucks Series Technical Discussions 1 March 27th, 2007 11:16 AM
Series III Cam Timing ... bossongs Series Technical Discussions 0 April 30th, 2006 05:11 PM


All times are GMT -5. The time now is 04:17 AM.


Copyright