✕
Site News - 7/2/26: All Bulletin Board Ads Removed for Members | 6/26: Updated AI Bot Software and more 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]

NG900 & OG93 Bulletin Board
1994-2002 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main NG900 & OG93 Bulletin Board | BBFAQ | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Mechanical vs. Hydraulic valve lifters.....
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by REM in Seattle (more from REM in Seattle) on Thu, 12 Jul 2001 10:37:00 Share Post by Email
In Reply to: Valve Adjustment Question, Stephen, Thu, 12 Jul 2001 08:36:36
Alert me when someone posts in this thread:
Members see ZERO ads on the bulletin boards and get more feature. - Help Keep This Site Online - Signup

My 1984 SAAB 900T and my 1991 Alfa Romeo Spider both use mechanical valve lifters requiring adjustment every 30,000 miles. My 1984 Jeep CJ7 and 1998 SAAB 900SET both use hydraulic lifters and require no adjustment.

Mechanical lifters were used for many years. The main advantages were that being solid, they were more accurate at setting the valve gap and the mechanical lifters would not collapse at high RPMs like the older hydraulic lifters. Disadvantages were the periodic need to adjust for wear and the additional valve train (the characteristic 'tapping') noise of metal on metal.

Hydraulic lifters have also been used by the automotive industry for many years for several good reasons. Compared to a mechanical lifter, the hydraulics are quieter, lower maintenance (self adjusting), ability to adjust for thermal expansion of the engine, built in shock absorber(eases stress on valve train).

Modern hydraulic lifters can be used for street applications and high performance applications where low maintenance is a primary concern. Advances in hydraulic lifters have enable them to overcome the high RPM collapse problems and to avoid hydraulic lifter 'pump-up' that used to be the main problems.

Posts in this Thread:
Alert me when someone posts in this thread:
Members see ZERO ads on the bulletin boards and get more feature. - 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 © 1988-2026 - 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!