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Old 04-18-09, 09:44 AM   #1
Lexamatic
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Default GS400 Motor Mounts

Got a CEL the other day and discovered the motor mounts were bad. The motor was flexing over causing a CEL for evaporative emissions because an emission hose was pulled loose from the motor. After 141k miles, it was time to replace the mounts. Did the tranny mount as well. 2 motor mounts and a tranny mount is $300 from Sewell. Local Midas shop installed them for $300.

This is one of the motor mounts. Note it is broken at the bottom. You can see the mounts are hosed if you put the car in gear, foot on brake, and goose the motor. Mine would flex way over, indicating broken mounts. With new mounts the car accelerates much more smoothly and crisply now.
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Old 04-18-09, 11:15 AM   #2
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I was also told by my Lexus dealer to replace the front 2 mounts aswel when I'm installing the tranny mount due to a deep cunk sound when I brake or accel harder than usual.
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Old 04-29-09, 12:34 AM   #3
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You probably can find oem mounts cheaper on ebay.
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Old 04-29-09, 04:20 PM   #4
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One update to this: When the mounts are changed, the installer will likely support the motor with a stand and un-bolt the engine cradle from the body. This requires the allignment to be re-checked after the cradle is re-attached.

And absolutely question the installer to make sure that all the bolts are properly torqued. The bubba that did my install didn't tighten the bolts properly and one of the mounts started making noise. There's a plastic access panel at the bottom of the suspension arm that provides a direct view of the bolts that attach the mount to the body, so its simple to inspect the work. The bolt that mounts to the motor is a little harder to see, especially on the passenger side. The exhaust manifold makes for a crowded space.
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Old 08-09-17, 10:59 PM   #5
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Quote:
Originally Posted by Solo_D33A View Post
I was also told by my Lexus dealer to replace the front 2 mounts aswel when I'm installing the tranny mount due to a deep cunk sound when I brake or accel harder than usual.
Would you happen to have a walk through process locations of mounts?
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Old 08-09-17, 11:01 PM   #6
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Originally Posted by Lexamatic View Post
Got a CEL the other day and discovered the motor mounts were bad. The motor was flexing over causing a CEL for evaporative emissions because an emission hose was pulled loose from the motor. After 141k miles, it was time to replace the mounts. Did the tranny mount as well. 2 motor mounts and a tranny mount is $300 from Sewell. Local Midas shop installed them for $300.

This is one of the motor mounts. Note it is broken at the bottom. You can see the mounts are hosed if you put the car in gear, foot on brake, and goose the motor. Mine would flex way over, indicating broken mounts. With new mounts the car accelerates much more smoothly and crisply now.
would you happen to have a walk through or location on these mounts
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