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Leaking Valve Cover Gasket

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Old Apr 18, 2026 | 01:13 PM
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Default Leaking Valve Cover Gasket

Hi,

I noticed some smoke coming from oil dripping onto the hot manifold on the driver-side engine bay. I suspect it's the valve cover gasket. Does anyone have the Lexus procedure for replacement? The car only has 50K on the dash, but sat for 2 years. I am considering replacing spark plugs and general throttle body cleaning while I'm in there, so any tips and tricks would be greatly appreciated. Thanks!
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Old Apr 19, 2026 | 07:40 AM
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Gasket is cheap. Change spark plugs while you're at it. I did mine about 2 years ago. I paid someone to do it and they had to take out the intake manifold. You could DIY it but it's not going to be easy. I ordered my gaskets from Amayama.com
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Old Apr 20, 2026 | 02:23 AM
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It's ordered. I'll get a set of OEM plugs for good measure. I sometimes wonder about the durability of the plastic manifold. Time will tell...
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Old Apr 20, 2026 | 05:53 AM
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Originally Posted by bfromguam
It's ordered. I'll get a set of OEM plugs for good measure. I sometimes wonder about the durability of the plastic manifold. Time will tell...
Oh i fergot to mention theres another 2 o-ring gaskets as well.
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Old Apr 20, 2026 | 10:56 AM
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Originally Posted by 4GS350
Oh i fergot to mention theres another 2 o-ring gaskets as well.
FWIW, The gasket perimeter is not usually where the leak is on this model. It's normally where the seals to the spark plug galley are.

Last edited by Asav; Apr 20, 2026 at 10:57 AM.
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Old Apr 20, 2026 | 12:50 PM
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The Intake Mani is easy. I took mine off and put a flow bench Ported one on in about 15mins or so.

When you have the Mani off a good thing to do is look and clean those Valves and Intake ports in there off of Carbon build up. If there has been no fuel cleaner and/or Intake cleaning that was performed as maintenance you will have some performance and efficiency robbing Carbon in there impleading flow.

Last edited by jgscott; Apr 20, 2026 at 03:29 PM. Reason: grammer
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Old Apr 21, 2026 | 12:44 AM
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Originally Posted by 4GS350
Oh i fergot to mention theres another 2 o-ring gaskets as well.
Please elaborate
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Old Apr 22, 2026 | 01:41 AM
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https://www.amayama.com/en/part/toyota/1115931010
Part number 11159-31010
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Old Apr 23, 2026 | 01:39 AM
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Correct me if I'm wrong, but this isn't the 2GR-FKS motor.
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Old Apr 26, 2026 | 06:24 AM
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2gr-fse.
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Old Apr 26, 2026 | 09:21 AM
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Don't you own a 2016+ GS350? Surprised that no one asked your year Model, because the 2013 - 2015 engine is different than the 2016 - 2020 GS350.

If you have a 2016 GS350 you have the 2GR-FKS 3.5 V6 - 311hp. I thought I remember you saying in some past post that is the model year you own?
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Old Apr 26, 2026 | 12:58 PM
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I have the 2GR-FKS motor, but thanks. The part I ordered was 11213-31090 and 1121431070 off of ebay. Confirmed to fit my vehicle. In regards to spark plug seals, this does not come with it so I'll have to get a set of that too. I'm still sourcing the plugs, preferably all OEM.
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Old Apr 27, 2026 | 06:36 AM
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OH....A fks
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