Adjusting valves - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 03-27-2006, 04:50 PM
Registered User
Join Date: Mar 2006
Location: Fla
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Adjusting valves

I just rebuilt a 396 big block chevy, has new cam & lifters. Engine is completely back together, my question is, whats the best way to adjust the valves for the 1st time? Engine is out of the car.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 04-06-2006, 04:57 AM
pepi's Avatar
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 1 Time in 1 Post
just rebuilt, I will assume this means the block is dry. Put oil in it, remove the distributer, using an oil priming tool I would put pressure on the system just to pump up the lifters. Now the fun part. Just a recap after the system has had pressure on it I would look at the rockers to make sure the oil has made it's way to the top of the engine filling the lifters. take a cylinder anyone you wish to start with. Start with both valves closed , rotate the crank until the exhaust valve JUST starts to open. At this time go to the intake on the same cylinder and adjust that lifter. Back off the nut until you can feel play in the rocker. Count to 5 or 10 just to make sure the spring in the lifter is expanded, recheck to make sure the rocker is free (loose), Now slowly bring the nut down until all the play is gone (0 lash ) from the rocker. Now continue 1/2 more turn and the adjustment is done for the intake. Now rotate the engine again and notice when the now adjusted intake begins to open. Stop there and now adjust the exhaust valve as described above. Then continue on to the next.

Two foot notes:

1 GM spec. is 3/4 after 0 lash
2. a rule of thumb is that if a valve just begins to open the opposite will be at 0 degrees or fully close, on the flattest spot of the cam.
Hope I have helped you out, if anything is unclear jut PM me with any questions and I will be glad to give you more information or clarity
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-06-2006, 05:38 AM
engineczar's Avatar Moderator
Last photo:
Join Date: Sep 2002
Location: Dubois, Wy
Age: 54
Posts: 1,909
Wiki Edits: 0

Thanks: 18
Thanked 143 Times in 117 Posts
One thing I would add is to follow the firing order 1-8-4-3-6-5-7-2 and do all the intakes then do all the exhausts. Same results, less turning of the engine.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Adjusting valves on SBC after cam install tnman Engine 15 11-16-2010 12:13 AM
need help adjusting valves 67bird Engine 5 09-23-2005 10:49 AM
Adjusting Valves EBlack36 Engine 4 08-06-2004 10:16 PM
problem finding zero play when adjusting valves jacobm99 Engine 7 02-24-2004 10:36 AM
Adjusting valves with Roller tip rockers...... joakes Engine 6 10-19-2002 05:54 PM

All times are GMT -6. The time now is 09:54 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.