GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

Spark plug change and throttle body cleaning...60k

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Old 04-12-13, 11:48 AM
  #16  
MCCR
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TB is no big deal, just don't spray directly into it. i've removed/installed TB's many times on mustangs on never had any issue. if you can reused the gasket, do so, if not a new gasket or silicone is fine. SVT lightnings are notorius for have oil get into the TB, at 60k, it doesn't look bad, but still a good idea to clean every so often.

whats the part # for Plugs on 07 GS350 RWD?
Old 04-12-13, 09:23 PM
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morganc
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Originally Posted by MCCR
TB is no big deal, just don't spray directly into it. i've removed/installed TB's many times on mustangs on never had any issue. if you can reused the gasket, do so, if not a new gasket or silicone is fine. SVT lightnings are notorius for have oil get into the TB, at 60k, it doesn't look bad, but still a good idea to clean every so often.

whats the part # for Plugs on 07 GS350 RWD?
Ya, definitely buy the new rubber gasket while you're at it. The galleries machined into the TB are fairly deep, and an absurd amount of silicone would have to be used. The TB gasket also contains an integral metal screen which catches any potentially engine damaging chunks and also creates laminar flow into the plenum, which increases efficiency and performance.
Old 04-14-13, 11:04 AM
  #18  
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Originally Posted by morganc
Ya, definitely buy the new rubber gasket while you're at it. The galleries machined into the TB are fairly deep, and an absurd amount of silicone would have to be used. The TB gasket also contains an integral metal screen which catches any potentially engine damaging chunks and also creates laminar flow into the plenum, which increases efficiency and performance.
Good to know as I've yet to remove the tb on my GS. Never mind the silicone reco.
Old 12-08-15, 02:06 PM
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Brabusx2
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Originally Posted by morganc
The GS450h actually has two vent lines. The first one has a PCV valve in it and is located at the right rear of the engine, tucked under the intake plenum. This particular vent line (which is the oiliest) dumps in *after* the throttle butterfly.

The secondary vent line doesn't do too much and has many baffles in the way to avoid a lot of oil transport into the intake system. The throttle butterflies in the 450h's typically stay cleaner than the 300's and 350's. The top of my intake manifold, however, was oily as anything when I pulled it off (same with the plenum).
is the TB gasket the same for 450h?

anychance if anyone have the part number for the gasket?
Old 12-09-15, 09:38 PM
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xbladex00
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nice job... I'm planning to change my plugs soon too, while at it clean the TB. Anybody know what size the spark plug socket is and where to get it?
Old 01-02-16, 09:43 PM
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CarKrayz
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I did some research but it would be great if anyone can confirm if the following is the correct spark plugs: Denso Iridium Spark Plug FKB20HBR11

Thanks in advance.
Old 01-03-16, 09:04 AM
  #22  
xbladex00
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Originally Posted by CarKrayz
I did some research but it would be great if anyone can confirm if the following is the correct spark plugs: Denso Iridium Spark Plug FKB20HBR11

Thanks in advance.
Yes, theyre the correct ones. 2GR-FSE in both the IS and GS
https://www.clublexus.com/forums/is-...g-service.html
Old 01-04-16, 12:29 PM
  #23  
Brabusx2
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what's the best place to get them? lexus dealer or?

i saw online they want $30 each
Old 01-04-16, 03:03 PM
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Originally Posted by Brabusx2
what's the best place to get them? lexus dealer or?

i saw online they want $30 each
Check Rockauto.com. Should run you about $12 MAX for each plug. I believe the ones you mentioned are about $10-11 apiece. If the spark plugs replacement makes it easier for a mechanic to access the TB, I don't see reason why NOT to clean it. If it's dirty, it'll make idling rougher and cause sudden shakes occasionally. Seems like a no brainer to me.
Old 01-04-16, 07:59 PM
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xbladex00
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Originally Posted by Steve2424
Check Rockauto.com. Should run you about $12 MAX for each plug. I believe the ones you mentioned are about $10-11 apiece. If the spark plugs replacement makes it easier for a mechanic to access the TB, I don't see reason why NOT to clean it. If it's dirty, it'll make idling rougher and cause sudden shakes occasionally. Seems like a no brainer to me.
curious question.... would any of the ones I buy on rockauto work? (the ones mean't for the GS350) I can't really find the exact plug but i think this is the closest one .... https://www.rockauto.com/catalog/mor...id=419&jpid=12
Old 01-04-16, 11:22 PM
  #26  
Steve2424
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Originally Posted by xbladex00
curious question.... would any of the ones I buy on rockauto work? (the ones mean't for the GS350) I can't really find the exact plug but i think this is the closest one .... https://www.rockauto.com/catalog/mor...id=419&jpid=12
I too would purchase these (currently I have to change my plugs ). To answer your question: YEs, they should. The parts are new and come with a limited warranty. I've already ordered off Rockauto on 2-3 occasions within the past 6 months and they've been great: quick shipping, and parts as described, packaged appropriately. At $10/plug vs. $30/plug, this is a no brainer.
Old 01-05-16, 04:43 AM
  #27  
burny
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22271-31020 is TB gasket for the GS350
Old 01-08-16, 02:17 PM
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kpxshorty
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nice diy.

how long did u take>>?
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