Re: Does the oil cooler ever drain? - Saab 9000 Bulletin Board - Saabnet.com
NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
After reviewing some old posts I can see why the oil cooler never drains. Short version, the oil cooler can't drain because the 225°F oil thermostat is closed.
Long version: Oil flows from sump to pump to oil filter to the thermostat. After the engine warms up the summer temperature of the sump of a '94 - '98 engine is reported to be in the neighborhood of 200°F - 210°F. It probably takes a combination of hot weather and heavy traffic – or perhaps some very spirited driving – for the oil temperature to reach 225°F resulting in an open thermostat and flow through the oil cooler circuit.
To be technically correct the oil temperature sender probably is sending the temperature of the oil pan, not the oil itself which is a little hotter.
It comes down to the question of how much oil remains in the engine (The 0.4 liters parked in the oil cooler circuit is irrelevant.) after it has been drained and the filter removed. The '94 and '97 manuals appear to be of the opinion that 0.4 liters remain; the '95, '96 and '98 manuals assume 0.8 liters remain.
First generation ('90 to '93) B234 engines took 4.5 quarts which filled them to the full index mark on the dipstick. Per the Saab Service Manual the dry capacity of that engine + filter was 4.6 quarts, which means only 0.1 quart remained in the engine. A lot must have changed in the 2nd generation B234 engines.
->Posting last edited on Fri, 9 Feb 2018 13:50:00.
Posts in this Thread:
- '94-'98 owners: Anyone using over 5 Qts of oil?, sam96CS , Wed, 31 Jan 2018 10:29:38
- It has been done with no reported problems, sam96CS , Fri, 9 Feb 2018 09:00:42
- Re: That's typically an engine re-builder's info..., Street, Sat, 3 Feb 2018 08:44:58
- The manual says 5.3 quarts, Noel , Fri, 2 Feb 2018 12:44:34
- Re: '94-'98 owners: Anyone using over 5 Qts of oil?, Simon S, Wed, 31 Jan 2018 10:40:20
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.
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 -
Your address is: 188.8.131.52 - 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!