Cylinder Leak Down Tester? - 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 08-08-2006, 09:31 PM
Member
 
Last photo:
Join Date: Aug 2002
Location: Alabama
Posts: 632
Wiki Edits: 0

Thanks: 0
Thanked 8 Times in 7 Posts
Cylinder Leak Down Tester?

I have a 67 327 engine with two cylinders next to each other with low compression. One has 110 the other 140. I am having a little trouble determining if its valves, rings, or head gasket (or all 3) with the compression gauge. Would a cylinder leak down tester pin point the exact location of the problem? Is this tool worth buying?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-08-2006, 09:52 PM
Member
 
Last photo:
Join Date: Aug 2004
Location: Kannapolis,NC
Age: 27
Posts: 155
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
You should be able to hear where the air is leaking out from. If you hear it through the intake manifold or the exhaust it is obviosly a valve problem, if you hear it in the crank case it is a ring problem and if you hear it from another cylinder it is a headgasket problem.

If you have the same compression tester that I have it has an air fitting on the hose that connects to the guage. You should be able to hook this to your air hose and it will serve the puropse of a leak down tester, which is nothing more than an adaptor from the compressor to the spark plug hole.

Here is the one I have.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-09-2006, 01:08 AM
powerrodsmike's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Make a fiberglass fan shroud
Last journal entry: Next.. ..Bagging the king B (barge)
Last photo:
Join Date: Jan 2005
Location: gilroy, california
Age: 53
Posts: 4,108
Wiki Edits: 161

Thanks: 0
Thanked 3 Times in 3 Posts
Cboy started a thread about leakdown testers a while back.
It has a couple of links to testing procedures using that tool.
Here it is Make your own leak down tester

Although you can use your compression tester hose in the same way as a leakdown /differential pressure tester to diagnose the problem component, the actual tester will give you a measureable indication of the condition of your rings, valves etc. A leakdown tester has a sized reference orifice that gives a benchmark to compare to.

If you work on cars with any regularity you will find a leakdown tester is a good tool to have. I don't think I've used my old compression tester once since I got my leakdown tester.

later, mikey
__________________
my signature lines...not really directed at anyone in particular..

BE different....ACT normal.

No one is completely useless..They can always be used as a bad example
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-09-2006, 09:58 AM
1939d2/s10's Avatar
Registered User
 
Join Date: Dec 2005
Location: Memphis,TN
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Snap on has a nice one,also good for setting up fuel injection barrell valve,Johnny
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-09-2006, 11:35 AM
Member
 

Last journal entry: Robs34 - Done my dash
Last photo:
Join Date: Nov 2004
Location: Adelaide Hills South Australia
Age: 60
Posts: 110
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
G'day

Using an oil can squirt some oil into the cylinders (about three to four squirts is enough) if rechecking the compression shows no change - problem above piston, If reading rises, problem likely rings. This is called a "wet " test.

Enjoy

Rob
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
Make your own leak down tester cboy Garage - Tools 3 02-14-2006 03:55 PM
Differential pressure/ leakdown tester powerrodsmike Garage - Tools 14 02-09-2006 02:43 PM
master cylinder vacum leak 65Guera Suspension - Brakes - Steering 4 09-14-2004 01:21 PM
Cam Help black66 Engine 3 05-12-2003 07:15 PM
Bleeding Wheel cylinder on a 91 corolla ramvrao Suspension - Brakes - Steering 1 03-20-2003 04:38 PM


All times are GMT -6. The time now is 03:09 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.