Ethanol in 1986 900T - what components are at risk? - Saab 900 Bulletin Board - Saabnet.com


[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Service/Mechs | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

C900 Bulletin Board
1979-1993 & 94 Conv [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only


[Main C900 Bulletin Board | Post Followup | BBFAQ ] [ Next by Date ] Member Login / Signup [Latest Member Gallery Photos]
Ethanol in 1986 900T - what components are at risk?
Like This Post:
Posted by mag [Email] (#1906) [Profile/Gallery] (more from mag) on Tue, 7 Jul 2009 21:19:36 Share Post by Email
Alert me when someone posts in this thread:

I'm hoping to assemble a clean body of information about converting a C900 to on straight ethanol. If I test this, it will be in a 1986 900T, so I particularly want data for that year and model. Please leave the poliical aspects aside - this is a technical project. Thanks kindly.


Today's Question: For a 1986 900T, is anyone aware of any fuel or exhaust system component which is known to be attacked (or known NOT to be attacked), over lengthy periods, by ethanol, either in E85 or in highproof (185+ proof) unblended ethanol, or in 170 proof unblended ethanol?


On these boards I've read

- conjecture that the injector O-rings *might* be attacked (however they are aside the fuel flow)
- conjecture that fuel line seals (e.g. at the fuel filter) might be attacked.
- the return line from the fuel pressure regulator is vulnerable.
- suspicion that even low concentrations of ethanol attacks the fuel level sender rendering it inaccurate.

Elsewhere (general ethanol-automotive literature) I've read

- for the first few tanks of ethanol, it tends to clean previously accumulated carbon and varnish from the system and this gathers in and fouls the oil and filter rapidly. So replace the oil and filter aggressively until this is cleaned out.

- If MMT (Methylcyclopentadienyl manganese tricarbonyl) was present in the gasoline, a thin deposit of manganese may have formed on some surfaces. Ethanol dissolves it and manganese accumulates on and fouls the O2 sensor. The fix is to anticipate it and replace the O2 sensor as needed.


The ethanol related threads in this forum and in the Performance forum suggest, without affirmation, that all other materials in C900 Saabs are tolerant of high concentrations of ethanol.


Note: Elsewhere I'm finding documentation that some materials used in engines are more strongly attacked by a blend of ethanol and gasoline than by either alone.



posted by 69.12.207...

Posts in this Thread:
Alert me when someone posts in this thread:

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 [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: [Member Only Feature] - Sign Up





The content on this site may not be republished without permission. Copyright © 1988-2020 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

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
Your address is: 3.235.107.209 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.


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!