Help with timing - JeepForum.com
 
LinkBack Thread Tools
post #1 of 4 Old 06-28-2014, 05:10 PM Thread Starter
djordan6319
Registered User
1991 YJ Wrangler 
 
Join Date: Jul 2012
Location: xenia
Posts: 53
Help with timing

I have a 95 YJ with the 2.5 when i bought the motor it had sat for 2 years so i went through and replaced some things including the timing chain and gears....what i am needing help with is when i started at TDC the timing marks are pointing at each other on the inside then you turn the gear until the cam is at the 1oclock position and the crank is at 3 oclock and there are 20 pins between the two timing marks.....it now has valve clang at highway speed anything over 40 as if it was a tooth off.....so I took everything back apart and checked it...when i put the two gears with the timing marks pointing at each other the distributor is now pointing at the #4 position as if it is 180 out but if i turn the motor one more time the distributor is at number one and my timing marks on the crank is at 12 and the mark on the cam is at 12 like the cam is 180 out at this point everything is TDC but the cam

Is this right or do i need to adjust the cam

Thanks

djordan6319 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 06-28-2014, 09:57 PM
Gausswave
Registered User
1989 YJ Wrangler 
 
Join Date: Jul 2013
Location: some where in the Cascades
Posts: 681
Being 180 out is ok for half the cycle. Think about the ratio of teeth between the cam and the crank and it should make sense. The only way I can think the timing ( crank vs. cam )would be off like that is if the crank gear is on backwards. Looking at the crank the key should be at 12:00 and the mark should be about 10:00.
Gausswave is offline  
post #3 of 4 Old 06-29-2014, 08:22 AM
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant
Posts: 18,090
You need TDC on the compression stroke. As you noted, there are 2 TDC's in the cycle. You find it by having your finger over the plug hole as you hand turn the engine over. When it comes up on the right TDC, you can feel it.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline  
post #4 of 4 Old 06-29-2014, 05:49 PM
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
2010 JK Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,882
Quote:
Originally Posted by djordan6319 View Post
I have a 95 YJ with the 2.5 when i bought the motor it had sat for 2 years so i went through and replaced some things including the timing chain and gears....what i am needing help with is when i started at TDC the timing marks are pointing at each other on the inside then you turn the gear until the cam is at the 1oclock position and the crank is at 3 oclock and there are 20 pins between the two timing marks.....it now has valve clang at highway speed anything over 40 as if it was a tooth off.....so I took everything back apart and checked it...when i put the two gears with the timing marks pointing at each other the distributor is now pointing at the #4 position as if it is 180 out but if i turn the motor one more time the distributor is at number one and my timing marks on the crank is at 12 and the mark on the cam is at 12 like the cam is 180 out at this point everything is TDC but the cam

Is this right or do i need to adjust the cam
Thanks
Here is how it should align. The pin on the crank and the keyway on the crank gets your crank/cam aligned.



Are you sure you have your distributor in properly?

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
laybackman is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome