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Old 11-08-2017, 07:20 PM   #1
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oil cooler delete?

With water cooled Turbocharger is oil cooler really needed on C900? On 1979-1987 years turbo is lubricated and cooled by the oil so I could understand the need for it but on 1988+ I think Saab kept it just for the marketing purpose. I just want to clean up my engine bay.

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Old 11-09-2017, 04:45 AM   #2
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Probably not 100% necessary if you drive like a grandma, but I'd want the cooler if you ever plan on beating on it. In my experience turbo cars can never have enough cooling. Even if there isn't a performance benefit, it will increase the life of everything.

Many other cars (Volvos, Toyotas, etc..) all have some sort of oil cooler standard even though the turbo's are water cooled.
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Old 11-09-2017, 06:21 AM   #3
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Just for oil longevity I'd keep it for sure, especially so since you're in Arizona.
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Old 11-09-2017, 02:41 PM   #4
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Probably not 100% necessary if you drive like a grandma, but I'd want the cooler if you ever plan on beating on it. In my experience turbo cars can never have enough cooling. Even if there isn't a performance benefit, it will increase the life of everything.
Many other cars (Volvos, Toyotas, etc..) all have some sort of oil cooler standard even though the turbo's are water cooled.
I got to take it easy now with this one anyway. Harder to find transmissions for cheap now days.

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Just for oil longevity I'd keep it for sure, especially so since you're in Arizona.
that is what I think, but I won't be driving this Saab on very hot days anyway because the as we all know A/C never works good enough on C900.
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Old 11-10-2017, 11:53 AM   #5
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Oil cooler is a good idea, all the endurance racers i know who run C900s not only keep them, but put larger ones in. as well as trans coolers. You can never have enough trans cooler
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Old 11-10-2017, 11:14 PM   #6
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Oil cooler is a good idea, all the endurance racers i know who run C900s not only keep them, but put larger ones in. as well as trans coolers. You can never have enough trans cooler
Actually if the oil bypass thermostat fails it may open sooner and you could get too much oil cooling, and that is not good for racing. 10w40 means when cold oil will flow better but will have less protection so it is essential that it gets quickly to operating temperature and have a viscosity of 40. Also oil needs to get hot to get rid of the moisture trough pcv.
Anyway I got few 900t so I will experiment with and without a cooler, and get to the bottom of it.
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Old 11-11-2017, 04:24 AM   #7
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I think the only way to know know is by measuring your oil temperature. If it gets too hot it's not going to be instant death or anything, so seems pretty harmless to try it with a gauge, and just shut down and let cool off if things get out of hand.

For a daily driver I think it's part of a critical temperature control system, and the benefits seem like they'd be aesthetic only, but then again all my cars are dirty and definitely NOT cleaned up under the hood lol.

Actually, it just occurred to me that you could try it really easily just by blocking things at the thermostat/bypass valve without a full removal, you really only have to block one end--and then with a gauge you'd know whether to spend the time doing it or not.

I don't know the 900's, do they have an oil temp measurement stock?

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Old 11-13-2017, 10:16 AM   #8
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I don't know the 900's, do they have an oil temp measurement stock?
No, they do not, but there are combination pressure switches with oil temp senders that you can add where the stock pressure switch is. I believe this is what people do when they add the 3-gauge pods above the center cubby and include an oil temp gauge.
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