Decel Smoke - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- 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
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 09-18-2010, 06:38 PM
Registered User
 
Last photo:
Join Date: Mar 2007
Location: Calgary, AB, Canada
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Decel Smoke

Engine is fresh rebuilt 406 SBC with new rings and heads. When accelarating hard, I am getting a small cloud of blue smoke between shifts. (manual)

From my research I understand that this can occur from oil entering the carb from the PCV line during a shift. I have checked this line after a hard run and I do find a bit of oil in the line.

I am wondering what the best method is to prevent this puff of smoke?

Valve covers and aftermarket PCV are new and seem to be working fine. There is a small diffuser inside the valve cover, under the PCV hole, as well.

Would installing a catch can between carb and PCV help, or any other suggestions?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-18-2010, 08:00 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,434
Wiki Edits: 0

Thanks: 230
Thanked 295 Times in 274 Posts
I would look at the baffle for the pcv valve. sounds like it needs a modification to work well. It could be oil getting in over the top getting to the valve . i would try to do something that would not interfere with the appearance under the hood.
Could also be you need a pcv valve with a heavier pellet in it.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-19-2010, 11:21 AM
Registered User
 
Join Date: Dec 2004
Location: San Jose Ca
Age: 62
Posts: 472
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Try removing the pcv from the valve cover and driving.What intake and gaskets are on it,sometimes the bottom of the intake don't seal and they pull oil from the valley.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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

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
Blue smoke ...?? Malibu1347AD Engine 5 12-16-2009 11:54 AM
Ping, blue smoke, - repeat daveEM Engine 1 07-03-2006 02:22 PM
Bewildered at the white smoke? HotRodMan Engine 5 09-08-2004 10:32 PM
Oil smoke or....? 383 Chevy Finmike Engine 8 07-08-2004 06:25 PM
Massive Smoke Tina Engine 11 08-17-2003 08:59 PM


All times are GMT -6. The time now is 08:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.