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PostPosted: Thu Dec 06, 2018 1:26 pm 
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Joined: Thu May 24, 2012 8:12 pm
Posts: 1758
Location: Blandford Forum
Car Model: All of them.
In September my above car gave up the ghost with its turbo and started spewing white smoke.

I didn't rush to replace it as I used another car but I did replace the turbo two weeks ago. In the meantime, approximately 3 months, I had driven the Saab on short mile-long journeys every few days, never really allowing it to warm up properly so as the turbo wouldn't spew smoke.

Just before the turbo was replaced I noticed condensation around the inner part of the oil filler cap. Not really surprising as the weather temperature had changed quite a lot since September and the number of short journeys.

When the turbo was replaced my guy said there was some creamy substance in the oil. He swapped the oil for new fully synthetic.

This morning when checking the oil level I noticed a little creamy substance on the dip stick. I've done about 500 miles since the turbo was changed. No obvious use of oil. No drop in coolant level in that time and the coolant is perfectly clean.

Could it just be contamination still ? Should I do another oil change ?

I don't want it to be a head gasket problem but how big a job is it to sort that out ?

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PostPosted: Thu Dec 06, 2018 2:27 pm 
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Joined: Wed Jan 05, 2011 5:32 pm
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Location: suffolk
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I’d just get it sniff tested . Cheap conformation it’s not hg first .
Probably nothing to worry about ..


Last edited by paulaero on Fri Dec 07, 2018 9:10 am, edited 1 time in total.

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PostPosted: Thu Dec 06, 2018 3:21 pm 
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Joined: Fri Nov 23, 2007 6:13 pm
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Location: Maidstone
Car Model: 9-5 Aero
What sort of trips has it been doing since the oil change?
As above, try a sniff test and maybe a compression test (check what the plugs look like).
A nice long run won't do it any harm..... you may find that getting the oil hot enough for long enough will get rid of the condensate. L

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PostPosted: Thu Dec 06, 2018 3:33 pm 
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Joined: Thu May 24, 2012 8:12 pm
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Location: Blandford Forum
Car Model: All of them.
Immediately after the replacement I did a 50 mile trip.
Since then three more of 40-50 miles. Plus daily two or three milers.

On the first trip I had a stalling problem after putting petrol in. That persisted until two days ago until I put a bottle of Cataclean in the tank. Stalling now disappeared.

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PostPosted: Thu Dec 06, 2018 3:47 pm 
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Joined: Tue Mar 25, 2014 5:41 pm
Posts: 1159
Location: Kippen STIRLING
Car Model: 9-5 Aero Sportwagen and more
ocallen,

How is your crankcase breather system ? I've had a car that had persistent 'mayonaise' in the dip stick and on oil changes. Finally replaced the whole breather system with the ( I think ) version 6 and the problem disappeared.

Paul @ Kippen


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PostPosted: Thu Dec 06, 2018 4:51 pm 
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Talking Turkey
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Location: not in a SAAB.
Car Model: One of the first RHD 9-5s
I would go with condensation due to short trips in relatively low ambient temperatures. This gets worse if the oil level is on the low side.

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PostPosted: Thu Dec 06, 2018 8:51 pm 
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Joined: Thu May 24, 2012 8:12 pm
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Location: Blandford Forum
Car Model: All of them.
Changed the breather system with parts from Neos in Feb 2017, 9000 miles ago.

Never low on oil.

Where the condensation sat, around the oil filler neck and inside the oil filler cap, has all disappeared since the first few days after the turbo was replaced. When checking then there was no creamy substance. Only in the last three days has it returned.

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PostPosted: Thu Dec 06, 2018 9:19 pm 
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Shotgun
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Joined: Tue Aug 08, 2006 8:51 pm
Posts: 11606
Location: 'Ull
Car Model: 95 Aero Auto Est Stg 1 Noobed
I'd suggest you've not been getting the engine up to a sufficient temperature for the water vapour in the air to evaporate. I saw this a great deal on my old 9000 after many short trips. Surprisingly though, I've yet to see it on my 9-5, which does very few miles a day for several weeks, then the occasional 100+ mile run every so often in the last 4 years? Maybe my city traffic commute allows the vapour to "burn off"?

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PostPosted: Thu Dec 06, 2018 9:40 pm 
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Talking Turkey
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Location: not in a SAAB.
Car Model: One of the first RHD 9-5s
The wifes 9-5 Aero is pretty bad for showing a bit of mayonnaise around the filler and usually a bit on the dipstick itself when the oil level drops (which is does alarmingly regularly). My car does pretty much an identical journey every day though (we work on the same trading estate now) but my car never shows it. Ultimately though, if it is just residue from condensation then its not a cause for concern.

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PostPosted: Thu Dec 06, 2018 10:36 pm 
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Joined: Thu May 24, 2012 8:12 pm
Posts: 1758
Location: Blandford Forum
Car Model: All of them.
I have noticed that the temp gauge does not often get up to the half way mark that often at the moment. On my longer journeys recently it won't get much over 1/3 but that's with outside temps being lowish. When it does get higher it's on the shorter journeys.

I'm going up to see Martin next week. Perhaps after that journey I should get him to do an oil change for me to at least see if the contamination disappears ?

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'95 BMW 320 auto touring.


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PostPosted: Fri Dec 07, 2018 8:08 am 
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Joined: Fri Nov 23, 2007 6:13 pm
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Location: Maidstone
Car Model: 9-5 Aero
Sounds like too many short journeys and possibly a sticky thermostat.

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PostPosted: Fri Dec 07, 2018 8:21 am 
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Joined: Fri Oct 05, 2012 5:02 pm
Posts: 1616
Location: Aberdeen
Car Model: Saab 9000 aero w/jules-tune
White smoke is often sign of head gasket, with turbo being blue smoke, sniff test would rule out that


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PostPosted: Fri Dec 07, 2018 1:53 pm 
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Posts: 1854
Location: Manchester
Car Model: MY 07 9-3 SC Vector
Also on a cold start (after being left overnight) does the car stutter for a 10 or so secs before evening out with? This would be h/g - only takes a little coolant to leak thru. On my OG and NG 9-3, despite doing a 6 mile around trip to work and back, I never saw mayo on the dipstick due to condensation.

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PostPosted: Fri Dec 07, 2018 2:04 pm 
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Joined: Thu Feb 14, 2008 10:47 am
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Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
Might be worth checking the hoses to/from the radiator and/or the thermostat, in case it's failed - when this happened on mine it failed open, so the engine didn't get up to temperature properly ...

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PostPosted: Fri Dec 07, 2018 2:50 pm 
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Talking Turkey
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Joined: Mon Apr 02, 2007 11:52 am
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Location: not in a SAAB.
Car Model: One of the first RHD 9-5s
ocallen wrote:
I have noticed that the temp gauge does not often get up to the half way mark that often at the moment. On my longer journeys recently it won't get much over 1/3 but that's with outside temps being lowish. When it does get higher it's on the shorter journeys.

I'm going up to see Martin next week. Perhaps after that journey I should get him to do an oil change for me to at least see if the contamination disappears ?


Thats almost certainly a stuck thermostat then, couple this with short runs and the engine will struggle to get up to temperature. I would suggest a good long run in it with plenty of boost. Get it right up to temperature so it can burn off all the water that is in the oil system then check it again.

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PostPosted: Fri Dec 07, 2018 7:57 pm 
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Joined: Thu May 24, 2012 8:12 pm
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Location: Blandford Forum
Car Model: All of them.
Sorry, being dumb. What do you mean "sniff test"?

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PostPosted: Fri Dec 07, 2018 9:22 pm 
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Saab Nut
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Joined: Fri Oct 05, 2012 5:02 pm
Posts: 1616
Location: Aberdeen
Car Model: Saab 9000 aero w/jules-tune
ocallen wrote:
Sorry, being dumb. What do you mean "sniff test"?


It basically tests the coolant for hydrocarbon, all garages will have the kit to do ot, if theres hydrocarbons in the coolant it means the head gasket is gone


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PostPosted: Sat Dec 08, 2018 5:10 pm 
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Joined: Thu Feb 14, 2008 10:47 am
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Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
jopo001 wrote:
ocallen wrote:
Sorry, being dumb. What do you mean "sniff test"?

It basically tests the coolant for hydrocarbon, all garages will have the kit to do ot, if theres hydrocarbons in the coolant it means the head gasket is gone

search for "head gasket tester" on eBay ...

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