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Old 11-06-2018, 07:03 PM   #1
CaMKii
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Member#: 491127
Join Date: Sep 2018
Chapter/Region: VIC
Vehicle:
2005 9-2x Aero
Blue

Default Momentary metallic rattling noise on cold start

Just got my 2005 Saab 9-2x Aero this fall. The temperature's been dropping, and I'm getting a new noise on cold morning start ups. There's a 1-2 second grinding/rattling sound that immediately goes away. I posted a video here:


It's very short in this video since the car was run about 4 hours prior. But in the mornings the noise lasts a second or two longer. Timing belt/tensioner replacement was just done about 4 months ago.

Any insights about whether I should be worried would be awesome, thanks in advance!
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Old 11-06-2018, 09:23 PM   #2
sWagonRX
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Member#: 324522
Join Date: Jun 2012
Chapter/Region: BAIC
Location: East Bay
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2005 WRX Wagon
PSM

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Its the starter gear grinding against the flywheel ring gear. I had this issue before and I have seen it in others as well. Basically the starter becomes "sticky," resulting in the drive gear not retracting right away. In summary, replace the starter when you get a chance lol.
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Old 11-06-2018, 10:35 PM   #3
CaMKii
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Quote:
Originally Posted by sWagonRX View Post
Its the starter gear grinding against the flywheel ring gear. I had this issue before and I have seen it in others as well. Basically the starter becomes "sticky," resulting in the drive gear not retracting right away. In summary, replace the starter when you get a chance lol.
Ah, that would make sense I guess. Do you think it's bad enough to take care of right away? Would it damage the ring gear?
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Old 11-09-2018, 10:52 PM   #4
sWagonRX
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I drove on it for at least a year before finally changing it when I did my clutch, but that was because mine did it intermittently. If yours is making this noise with EVERY startup, I would recommend replacing it sooner than later to avoid potential damage to the flywheel ring gear. The starter at the top of the transmission bell housing, so it is fairly easy to replace.
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