PCV systems??? - 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 11-23-2004, 06:37 PM
danarmstrong's Avatar
New Member
Last photo:
Join Date: Nov 2004
Location: Alabama
Age: 47
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
PCV systems???

I have done a search and found a few threads on this topic but none that answer my question, I have valve covers with no baffles in them and at high RPM's it pulls oil and smokes like 2 stroke, can I just use two breathers in each valve cover and do away with the vacuum or do I have to use the pcv system ,, I really dont want to weld on the insids of these covers so what are my options, none,,, either weld baffles in them or get another set , these are the aluminum welded type from performance racining with only one hole for the pcv valve on the driver side, the other has no hole so if I cut a hole in the passenger side and put a breather do you think that would help or with no baffle I would still get oil in the pcv valve,, I read about Mr gasket's plugs with a built in baffle ,, is this an option or because I have no breather on the other side do I need to do something anyway,,
Any help is appreciated, I just bought this car and have never had this problem with any low horse motors I have built so I am new to 450 horse,,My 275 horse has a breather and a pcv on the driver side and seems to work fie,,

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-23-2004, 07:02 PM
MI2600's Avatar
Member# 3287

Last journal entry: Vortec Heads
Last photo:
Join Date: Jul 2002
Location: N. Muskegon, MI
Posts: 2,632
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

You have top have air into and out of the engine.

Even before PCVs, engines had a road draft tube that expelled fumes into the environment and usually some type of intake breather in the oil filler cap.

I don't understand. With only one hole for a PCV, where do you add oil?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-24-2004, 12:43 PM
danarmstrong's Avatar
New Member
Last photo:
Join Date: Nov 2004
Location: Alabama
Age: 47
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

You know, that is a D#$% good question, I just bought this car a few weeks ago and have been so busy on other things I haven't even looked, I do know it has tall aluminum covers from some racing shop on it and the driverside has the PCVin it and thats all the holes I have seen, I will look at that when I get home,,
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-24-2004, 02:42 PM
docvette's Avatar
Registered User
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 64
Posts: 7,360
Wiki Edits: 12

Thanks: 0
Thanked 7 Times in 4 Posts

Doc here:


If you only have ONE hole, you've found the problem...

Overpressure in the crankcase.

Get another set of Valve covers WITH oil fillers & Baffles on BOTH sides, put a grommet in one for the PCV and a Positive Vented cap in the other..

Pressure ,air must PASS through the Crankcase, or else it will just suck down on a tight sealed crankcase, oil will get sucked into the induction system.

If you find you have a filler, Check the cap to be sure it is a breather type of cap..

And if you find you still need a baffle for the PCV, get an old cover with a baffle in it, Grind or drill off the spot welds, and check to be sure it won't hit anything on the Rocker area, when installed, then JB Weld it to the inside of the new cover.

Use a good layer of JB, but I'd be more Comfortable with 2 or 4 TIG spots than the JB Weld. (you should be able to quench the cover with water while welding to avoid burns in the chrome.)Maybe tack it close to the filler opening, so if it does discolor , the grommet should hide it.

Happy Holidays!
Hope it helps!

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

All times are GMT -6. The time now is 07:36 AM.

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 Hotrodders.com 1999 - 2012. All Rights Reserved.