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Recreational Mechanic
 
Nickshu's Avatar
 
Join Date: Sep 2000
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Front suspension pop noise

I have a popping noise from my front suspension. Occurs at low speeds when applying the brakes or going over a driveway curb. Sounds to me like a loose subframe. Does that make sense and what pickup points do I need to check torque on? Common issue?
2003 996 Carrera coupe, 20k original miles.

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Old 03-27-2017, 06:57 AM
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could easily be drop links which is very common wear item that produces that sound. If the rubber boot is damaged they wear pretty quickly. Doesn't take much movement either to make the sound.
if you think subframe, look at the bolts and try a wrench on them. If they're tight, it's not the problem. Get the car off the ground and unload the front end. Remove the wheels top eliminate the extra weight. If the subframe is loose, the torque spec will no doubt be forthcoming.
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Old 03-27-2017, 08:48 AM
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Quote:
Originally Posted by tonythetarga View Post
could easily be drop links which is very common wear item that produces that sound. If the rubber boot is damaged they wear pretty quickly. Doesn't take much movement either to make the sound.
if you think subframe, look at the bolts and try a wrench on them. If they're tight, it's not the problem. Get the car off the ground and unload the front end. Remove the wheels top eliminate the extra weight. If the subframe is loose, the torque spec will no doubt be forthcoming.
Thanks I will check it out this weekend and thanks for the tip on the drop links!
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Current fun: 2003 996 Carrera 2 - Midnight blue / 1964 Corvair Spyder turbo convertible
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"Straight roads are for fast cars, turns are for fast drivers" -Colin McRae
Old 03-27-2017, 09:22 AM
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I got under the car and started torqueing stuff down and found that one of the subframe bracket bolts that goes into the body was stripped out. As a result the two bolts behind this one were a bit loose so the right side of the subframe was shifting. I torqued them all down and the pop is gone. I ordered a helicoil kit for the M12x1.5 bolt that was stripped and will fix it this weekend.
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"Straight roads are for fast cars, turns are for fast drivers" -Colin McRae
Old 03-28-2017, 04:55 AM
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Check your tire wear. Might be worth doing an alignment check too.
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2006 Cayman S
1986 911 Carrera track car...gone but still loved!
Remember Warren Hall. Contact me for your Warren 'Early S Man' Hall memorial decals.
Old 03-28-2017, 09:13 AM
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Quote:
Originally Posted by tonythetarga View Post
Check your tire wear. Might be worth doing an alignment check too.
Yes I agree probably worth checking after addressing the loose bolts.
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Current fun: 2003 996 Carrera 2 - Midnight blue / 1964 Corvair Spyder turbo convertible
Past fun: 1982 911SC Coupe (SOLD to a fellow Pelican) / 2005 Lotus Elise Supercharged (SOLD)
Current Dailys: 2018 Volvo XC90 T8 R-Design / 2015 Volvo S60 Polestar

"Straight roads are for fast cars, turns are for fast drivers" -Colin McRae
Old 03-31-2017, 03:54 PM
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