The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[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]

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 | BBFAQ | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Engine Running Hot -=UPDATE=- V/LONG -- pt1
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Mark UK (more from Mark UK) on Thu, 14 Apr 2005 10:08:35 Share Post by Email
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Engine running hot update - very long as I have tried to be as explanatory as possible. I've tried pretty much everything I know!

Anyone remembering my previous post can skip to "My suspicions" near the bottom those who didn't then may be of use to read all the way from the top as it with familiarise you with the issue.

Car is a 1992 900 aero LPT manual transmission

Ok, the issue.....

Rad was damaged by a driver reversing in to front of car - no water was leaking so drive it home ( 4 miles of rolling road) , when driving home the engine overheated due to water loss ( probably due to rise in water pressure and still had around 2/3 of the water still it the engine when I stopped the car) total time of over heat was about 2-3 mins. When I got home I put hot water in until it filled the header tank, when adding the water I opened the thermostat bleed valve to allow any air to come out. Ran the car on idle to also water to circulate and until the temp dropped ( 2-3 mins) then left the car for the insurance to come round and view it.

6 months later the insurance decided to write the car off and pay me out ( I was given a hire car for the 6 mothn as full liability was claimed by the other party so the Saab didnt move at all). I bought the car back thinking it's just a rad, grill and a set of lights thats needed and I'll replace the head gasket for piece of mind.

I've done all the above and more and the engine now runs very hot. The gasket had gone between a water feed and cylinder 1, well looked like it had, it was probably about to go if not - I also replaced the timing chain at this point.

When the car idles up to operating temp it will quite happily have a temp of smack on centre on the temp gauge, when I drive the car without much turbo activity it sits smack centre of the gauge. As soon as I put my foot down for over a min or two the temp rises to around 4/5 of the gauge and stays there. Doesn't matter how long I drive for without using the turbo, doing over 40mph to get good air flow through the rad. I can hear the fan going when the temp rises.

Only thing that lowers the temp is if I put the heater on. If I do this it drops with in out 5 - 8 mins to centre of the gauge.

I've replaced the rad again, replaced the thermostat to an 82 degree one, replaced the fan switch to an 82 degree one, replaced the water pump, flushed the cooling system with the best cooling system cleaner I can find ( I've done this 3 times ), replaced the bypass valve ( the plastic thing thats attached to the heater pipes and then to the water pump and so on...)

When I changed the head gasket I didn't get the head skimmed as it seems to be straight, I did the tests recommended on various saab sites. Could a cracked head cause this issue.

I have another rad coming, two new fans and a new temp sender, I can't see these will help but I have to try as it's doing me in.



My suspicions and reasons for counting or discounting them are below ( the car has no other issues at all, idles fine, drives fine, boosts to 0.4 bar and quickly drops to 0.3-0.25. Negative reading on the gauge at idle and no throttle when driving is about 0.3 - 0.4 bar but I think I have a small leak on the rocker cover grommet, I have a new one of these on the way. DOES THIS SOUND NORMAL readings for a 1992 900 aero LPT ?


No or minimal circulation - possible I'm thing this as there very little pressure in the header tank when engine is hot, possibly blocked rad, bad pump(replaced it!), blockage in engine ( flushed with 2 part flush and a stuck a water mains hose up every water pipe I could get to but still possible I suppose) , water leak ( no leaks! )


posted by 82.33.11...
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!