Re: "leak-down tests" aww crap! - Saab Vintage Models Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News -
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

Vintage Models Bulletin Board
1950-1966 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main Vintage Models Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: "leak-down tests" aww crap!
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Jim H (more from Jim H) on Wed, 2 Mar 2005 08:50:01 Share Post by Email
In Reply to: aww crap!, MikeinME, Mon, 28 Feb 2005 10:31:28
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

MikeinME, you might consider subjecting each of the motor's cylinders to a "leak-down test".

A cylinder's leak-down test shares a common theory with the compression test. But you can get a better idea of what is wrong. Using the cylinder's spark plug hole to pressurize the cylinder with compressed air you can figure out if and where your cylinder is leaking. You will need to do this when the TEST cylinder is at TDC (top dead center) OR THE COMPRESSED AIR COULD TURN THE ENGINE OVER AND CAUSE DAMAGE. By comparing your results with a repair manual, which lists the rates for cylinder leak-down, you can determine if your cylinder/engine is up to specs. If you can figure out where the compressed air is going during your leak-down test you may be able to figure out if you need a new head gasket, new rings or a valve job! You can do this by using your ears, and your hand to find the escaping air (wet your hand for higher sensitivity). First put your hand or ear over the oil fill hole. If air is felt or heard coming out here you’ve got air leaking around the rings into the crankcase. Next check the exhaust pipe and then the carburetor's intake throat for leaking air. If air is felt or heard coming out here it may mean that you have a exhaust or an intake valve that is not seating properly. Finally, open your radiator and if bubbles of air are seen coming out of the coolant then you’ve got a blown head gasket.


posted by 24.66.16...

Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!