AZ Mike Posted June 14, 2008 Share Posted June 14, 2008 I would like to clean the throttle body on my '99 LS400. After looking at the lexls "how to", I realize that my airtube and location of the throttle body are completely different than the 1st generation LS. There is a large "rectangular-ish" attachment to the airtube that extends out parallel to the passenger side valve cover. Is it all one piece and all come out, or does that piece separate from the primary airtube? Anyone with any tips or photos? Thanks in advance. One other question: the radiator fill is just above and to the passenger side of the throttle body, right? Torx head 10 mm? Quote Link to comment Share on other sites More sharing options...
Bali26 Posted June 15, 2008 Share Posted June 15, 2008 yes the rectangular box is attached to the pipe. There is a bolt on the passenger side. Take it out carefully.. There is a fill hole for engine right next to the thermostat. Quote Link to comment Share on other sites More sharing options...
AZ Mike Posted June 16, 2008 Author Share Posted June 16, 2008 Any tips/tricks to getting the airtube out other than "be careful"? I.e., bolts, vacuum tubes, sensors, etc. that are difficult to see? Quote Link to comment Share on other sites More sharing options...
AZ Mike Posted June 18, 2008 Author Share Posted June 18, 2008 OK....it was quite simple. Disconnect 3 hoses and 2 bolts on the rectangular portion of airtube, and it all comes out easily. Shockingly, there was very little carbon buildup on the throttle body; even the backside of the butterfly valve. A few sprays of throttle body cleaner, a toothbrush, wipe with a rag, and it was done. It was so clean, I saw no need to remove the throttle body. Quote Link to comment Share on other sites More sharing options...
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