chevy 350 engine smoking - 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> General Rodding Tech
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-06-2012, 07:33 PM
Registered User
 
Last photo:
Join Date: Jul 2011
Location: alabama
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
chevy 350 engine smoking

i have a 1973 chevy 350 engine that smokes a blueish/gray smoke at idle sometimes. it smells like gas but i have replace the carb. and adjusted it out. the engine runs and starts perfect hot or cold with plenty power and no rattles.the engine been rebuilt about 4 years ago and have been setting up every since. should i just drive it a little bit and see what happen because i only have driven it about 20 miles since i had it. from the best i can tell it only smokes at idle because going down the highway i didn't notice any smoke. i have had a vehicle that had bad valve guides that smoked very bad at start up but this smoke is not hanging around like that it comes out in little puffs and some times none at all.. please help
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-06-2012, 08:40 PM
Registered User
 
Last photo:
Join Date: Jul 2011
Location: alabama
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
smoking

can the carb. cause a chevy 350 to smoke at idle
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-06-2012, 09:10 PM
66GMC's Avatar
Get in, sit down, hang on
 

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 56
Posts: 2,761
Wiki Edits: 0

Thanks: 32
Thanked 89 Times in 84 Posts
Has the engine ever actually been broken in since "rebuilt"?

I'd say "drive it" for a while. Get a feel for the oil consumption, if any.

Check the PCV valve and hose at the back of the carb and transmission vacuum line for a show of oil. An intermittent puff of blue might be a couple of drops of oil getting sucked in from something like that.

It's also possible that valve stem seals may have dried up a bit after having sat for 4 years.

If the problem persists, I'd suggest that you pull the plugs and read them.
If you put a mark at the top of each spark plug base (and find the plugs to be oil fouled upon removal) you'll be able to determine if the oil is coming from the top (valve seals, PCV, trans modulator, etc) or from below (i.e. rings)

If it's running rich (fuel smell) it may be that some of the debris / sediment from the fuel tank might be working its way thru and interfering with the need & seat in the carb. Check & replace, if nessecary, the fuel filter while putting a couple of tankfuls through it.
Reply With Quote Quick reply to this message

Recent General Rodding Tech 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
pancake engine smoking. help me out here boatanchors Engine 5 09-02-2008 07:34 PM
new engine is smoking potts Engine 7 04-04-2006 02:27 PM
smoking engine carguytrg Engine 3 01-02-2005 12:52 PM
smoking engine mytyty Hotrodding Basics 15 05-17-2004 11:36 AM
My Engine Is Smoking pintoperformance Engine 2 10-28-2003 05:23 PM


All times are GMT -6. The time now is 12:47 PM.


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.