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 Post subject: 2002 9-3 Running hot
PostPosted: Tue May 15, 2018 5:55 pm 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Hi all.
I have just bought a 2002 9-3 2l turbo convertible.
I have noticed from when I bought it that it heats up very fast from cold (less than 5 mins) and when it's warmed up the engine smells hot (if that makes sense. The temperature needle stays at 9 o'clock but get to that in under 5 mins from cold. I have an obd2 Bluetooth adaptor and it is showing about 90 - 95 degrees when it's hot although when I put a meat temperature probe in the water tank it's only showing 60 degrees. Not sure what's going on so need your help.
Thanks

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02 Saab 9-3 2.0L Turbo SE convertible


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Tue May 15, 2018 8:17 pm 
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UKS Addict

Joined: Fri Apr 24, 2009 5:33 pm
Posts: 8363
Location: Derbyshire
Car Model: 9-3ss Aero + og93 RWD trackcar
Probably worth changing the thermostat as a start point, they are cheap enough.

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Tue May 15, 2018 9:22 pm 
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UKS Addict

Joined: Sun Jan 26, 2014 9:41 am
Posts: 2242
Location: Royal Tunbridge Wells
Car Model: '03 9-5 2.3 Vector Auto Estate
My 9-3 heats up quickly too, even quicker than the 9-5 and that does not take long. 90degC sounds OK, not sure about the header tank, maybe a water thermometer would be letter!

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Alan

'03 Saab 9-5 Vector 2.3t Auto Noob Stg 1
'01 Saab 9-3 2.0t SE Convertible
'81 Triumph TR7 DHC


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Tue May 15, 2018 9:29 pm 
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UKS Addict
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Joined: Sat Jun 02, 2012 9:25 pm
Posts: 4776
Location: Ingleby barwick, cleveland
Car Model: 2000 9-3 viggen convertible.
I think it’s normal for the 9-3 and 9-5 B235R engine to warm up quickly.

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 6:17 am 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Ok an update on the temperature.
I ran my phone connected to the obd2 adapter and monitored the temperature on the way to work. It climbs up to 96-97 degrees c then rapidly drops back down to 88 -89 degrees c and then quickly back up to 97 and repeats. Is this normal? Am guessing the thermostat opens and drops the temperature and closes again?
Thanks for the help

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 6:48 am 
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Joined: Thu Feb 14, 2008 10:47 am
Posts: 5660
Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
Thermostat normally opens at about 88 degrees, the cycling of the temperature will be due to the cooling fan(s) cutting in and out and is normal.

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 7:22 am 
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Saab Nut

Joined: Mon Apr 07, 2014 5:22 am
Posts: 1027
Location: Ashford, Kent.
Car Model: 93 convertible Aero MMI
My 2001 93 is the same. Always has been like this

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 8:45 am 
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Full Pressure Turbo
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Joined: Sat Jul 08, 2006 9:10 am
Posts: 654
Location: Longton
Depends on the sort of driving / traffic conditions but on the move, steady speed above 30mph or so it should have sufficient airflow to maintain close to the thermostat's rated value, maybe a couple of degrees above. If it is showing constant fluctuations up to 97 degrees and back to 88 I would suggest the 'stat might be a bit sticky.

Both my '02 9-3 and '01 9-5 have had new 'stats recently as both were running a bit cool and until encountering slow moving / stop-start traffic both run at a very steady temperature now.

As soon as the traffic gets any slower than a steady 30 or so, both will warm up to 97+ and then fluctuate a few degrees up and down as the fans cut in and out, until on the move once more.

When on the move, the fans should never need to be cutting in. If they are (air-con off) then I would suspect an issue.

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 1:56 pm 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Ok thanks for the info.
I have ordered a new thermostat so will fit that over the weekend and see if it makes it any better. I was panicking that there was something really wrong but it seems like it's not as bad as I thought which is good.
I will let you all know if it's any better after a thermostat change.
I have seen a video of how to change it and it looks pretty easy. Is there anything I need to be aware of when I change it? Looks like just three bolts off and I can get to it? Also to I need to put any vasoline on the thermostat to seal it better? (Saw somewhere about using it?)
Thanks all

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02 Saab 9-3 2.0L Turbo SE convertible


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 8:26 pm 
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UKS Addict

Joined: Sun Jan 26, 2014 9:41 am
Posts: 2242
Location: Royal Tunbridge Wells
Car Model: '03 9-5 2.3 Vector Auto Estate
If you get a cheap (ECP type) thermostat watch that the sealing ring is thick enough. Last time I used one it started leaking after a week and I had to change the seal for the one from the OE stat I had removed. No problems after that.

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'03 Saab 9-5 Vector 2.3t Auto Noob Stg 1
'01 Saab 9-3 2.0t SE Convertible
'81 Triumph TR7 DHC


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Wed May 16, 2018 8:37 pm 
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UKS Addict
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Joined: Thu Feb 14, 2008 10:47 am
Posts: 5660
Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
Genuine ones can be had for a tenner ... make sure the bleed valve is at the top when you fit it. One had failed on a previous car, they tend to fail open meaning it takes ages for the engine to reach temperature ...

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 5:39 am 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Thanks for the replys.
I have reserved a thermostat from eurocarparts but I want to make sure I have the correct one as I know there are a few different temperature ones, plus I would like a genuine one. Can anyone point me to the right one please? My engine is 2.0turbo se 154 bhp. Also does anywhere do a new gasket for the housing with it?
Thanks all

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 9:54 am 
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UKS Addict
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Joined: Thu Feb 14, 2008 10:47 am
Posts: 5660
Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
Saab part number is 30577561, which includes the gasket that fits around the thermostat itself.

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'98 9k 2.3T CSE, stage 3
'04 9-5 Aero manual, stage 3
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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 10:56 am 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Ok thank you. Is there a gasket on the thermostat cover (the part with 3 bolts holding it on)? If so does it need replacing when I change the thermostat?
Thanks

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 12:23 pm 
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Joined: Thu Feb 14, 2008 10:47 am
Posts: 5660
Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
not that I've ever seen or used, the thermostat sits between the two and water flows through it (or not) rather than around the edges of the thermostat itself.

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'04 9-5 Aero manual, stage 3
'08 Jaguar XFR


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 2:10 pm 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
Ahh ok so does the rubber part of the thermostat sit between the two body parts? Hard to explain

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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 2:34 pm 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
I have just found this, I can now see the thermostat sits between the body's and flows through the thermostat like you said. Makes sense now :D


Attachments:
20180517_153415.jpg
20180517_153415.jpg [ 163.58 KiB | Viewed 92 times ]

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02 Saab 9-3 2.0L Turbo SE convertible
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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 7:51 pm 
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UKS Addict

Joined: Sun Jan 26, 2014 9:41 am
Posts: 2242
Location: Royal Tunbridge Wells
Car Model: '03 9-5 2.3 Vector Auto Estate
If you want genuine try Saabits.
http://www.saabits.com/all/genuine-saab ... h=291_298&
Bill also does a cheaper alternative which I would trust more than ECP. Note UKS members also get a discount with the code on Bill J's posts.

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Alan

'03 Saab 9-5 Vector 2.3t Auto Noob Stg 1
'01 Saab 9-3 2.0t SE Convertible
'81 Triumph TR7 DHC


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 8:11 pm 
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Joined: Tue May 15, 2018 5:29 pm
Posts: 11
Car Model: Saab 9-3
That's where I ordered one from in the end TWS. Great site!

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02 Saab 9-3 2.0L Turbo SE convertible


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 Post subject: Re: 2002 9-3 Running hot
PostPosted: Thu May 17, 2018 8:36 pm 
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Active user

Joined: Fri Mar 09, 2018 9:53 am
Posts: 196
Location: cod ww2, mostly
Car Model: 9-5 estate, with sunblinds :)
genuine thermostats do, in my experience, maybe old stock but hey, come with gaskets as the thermo is used in multiple engines. you should/did get a gasket for different types of engines. steve lewis was the last person i bought a thermostat from and it did indeed come with the gaskets. although, the rubber seal that comes with it has often done the job without actually needing the gasket, rightly or wrongly...


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