45714LS400 Posted March 31, 2009 Share Posted March 31, 2009 My 92 LS400 needs spark plugs replaced but where are they? And does anyone hav a suggestion for a good type of plug, i was told NGK are good plugs for it. Any help would b great Quote Link to comment Share on other sites More sharing options...
yidaitianjiaous Posted March 31, 2009 Share Posted March 31, 2009 My 92 LS400 needs spark plugs replaced but where are they? And does anyone hav a suggestion for a good type of plug, i was told NGK are good plugs for it. Any help would b great the plugs are under the plastic cover of the engine. you have to remove the covers first. Cables underneath kinda complicated, don;t mess up. generally, change the plugs also change the cables Quote Link to comment Share on other sites More sharing options...
Lucky13 Posted March 31, 2009 Share Posted March 31, 2009 And when you have then out go ahead and use an air compressor to blow any corrosion out of the socket. And you will need a sparkplug socket to pull them out because they are in deep. Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted March 31, 2009 Share Posted March 31, 2009 Denso Iridium Long Life. (best) Or NGK Iridium. They are under the plastic covers that say 4 CAM 32 VALVE or whatever. Quote Link to comment Share on other sites More sharing options...
45714LS400 Posted March 31, 2009 Author Share Posted March 31, 2009 Denso Iridium Long Life. (best)Or NGK Iridium. They are under the plastic covers that say 4 CAM 32 VALVE or whatever. oooh i got ya. thanks for the location and i hav heard good things about the NGK Iridium, i think thats wat i'll get for it Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted March 31, 2009 Share Posted March 31, 2009 Denso are beter Quote Link to comment Share on other sites More sharing options...
Lucky13 Posted March 31, 2009 Share Posted March 31, 2009 Yes Denso is a better brand to use in in these cars. Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted March 31, 2009 Share Posted March 31, 2009 Spend a little extra for the long life too Quote Link to comment Share on other sites More sharing options...
steve2006 Posted March 31, 2009 Share Posted March 31, 2009 Hi, Here's the tutorial for the plug and wire change http://www.lexls.com/tutorials/ignition/sparkplugs.html Quote Link to comment Share on other sites More sharing options...
90LS400Lexus Posted April 4, 2009 Share Posted April 4, 2009 I have always wondered how you change the plugs on an LS. Looks like so much fun! :) It takes about 5 minutes to change the spark plugs on my 6-cylinder Mercedes S-Class sedan. :D (which I plan on doing soon). ;) Quote Link to comment Share on other sites More sharing options...
Lucky13 Posted April 4, 2009 Share Posted April 4, 2009 Much longer than that on these cars. It can be a pain having to remove to many things. Quote Link to comment Share on other sites More sharing options...
dcfish Posted April 4, 2009 Share Posted April 4, 2009 You owe us at LOC a round PLUG_WIRES_V_8.pdf Quote Link to comment Share on other sites More sharing options...
Brett in AK Posted April 4, 2009 Share Posted April 4, 2009 And when you have then out go ahead and use an air compressor to blow any corrosion out of the socket. And you will need a sparkplug socket to pull them out because they are in deep.To further clarify this statement a bit, remove the spark plug wire from the plug and "then" blow any dust or debri out of the hole before you remove the plug. Otherwise you're blowing all the crud down into the cylinder. Pretty basic I know, but some folks tend to do exactly what they read. Quote Link to comment Share on other sites More sharing options...
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