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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Oct-01-2018, 12:41:48 PM   #1
Distinct70
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Default SPAL Fan help SMG Overheat?

Curious if any owners changing to SPAL or equivalent higher performing fan have also noticed that their SMG overheat problems have improved or gone away completely because the fan is helping to cool things down. Wondering if the SMG relocation may not be needed if airflow is improved. I have never had a SMG ovherheat while moving at speed on the highway, only comes at slow speeds in traffic so Iím wondering if SPAL could help.

Thanks.
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Old Mon, Oct-01-2018, 03:36:34 PM   #2
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Default Re: SPAL Fan help SMG Overheat?

When I first got my M3 I was worried about the SMG issues in hot climates. I live in Las Vegas and we see constant summer days between 100-120. Beings my M3 is my daily driver I started doing things to help lower engine compartment temps. I installed some SGT ceramic coated headers and Sect 2 with 200 cell cats, VIS XTS CF Vented Hood, Spal Electric fan (kept the Aux Fan) with a PWM unit.

Unless I have a unicorn SMG pump/motor at 125k I believe these things have helped, I haven't had one single SMG issue to date. I also syphon and refill the SMG fluid out of the reservoir during every oil change. I've driven in 120 days without any problems even in stop and go traffic.
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Old Mon, Oct-01-2018, 05:14:57 PM   #3
E46 Mystic M3
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Default Re: SPAL Fan help SMG Overheat?

Quote:
Originally Posted by WOLFN8TR View Post
I also syphon and refill the SMG fluid out of the reservoir during every oil change.
This is why you're not having problems. Good move. More people need to do this.
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Old Mon, Oct-01-2018, 09:59:35 PM   #4
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Default Re: SPAL Fan help SMG Overheat?

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Originally Posted by E46 Mystic M3 View Post
This is why you're not having problems. Good move. More people need to do this.
Are you being serious? It doesn't circulate fluid. Bleeding would be the only way to get fresh fluid in the system.

OP: If you are getting SMG unit temperature shutdowns, damage has already been inflicted to the electric motor. It is not a BFD to relocate it. Buying a vented hood may allow a higher tolerance to high ambient temps and slow traffic.

Personally I never had shutdowns unless it was over 95F for more than 60 minutes and that slowly decreased to nearly 30 min before I relocated it.

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Discussing Streamline & Dr M3an M3's CSL Airbox Development Journal Collaboration in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)