The spark plugs are located in well in the valve cover, remove them one at a time with a deep 5/8 good quality spark plug socket 3/8" drive on a 12 inch extension and a like sized ratchet. Remove the spark plug boot from the plug with a twisting motion side to side with the spark plug out remove the spark plug wire for that cylinder from the distributor cap and match it by length to the new wire in the spark plug wire set, make sure you get the closest one in length to the original wire, this is important. In stall the spark plug back into the valve cover well and attach the long plug boot to it in a twisting motion, use a little silicone grease on the inside of the boot to ease installation, it is supplied with the wire kit. Repeat this for each cylinder and match the individual wire lengths as you go as close as possible to the original wires. PLEASE NOTE: IF YOU FIND OIL ON THE PLUGS OR WIRE BOOTS THE VALVE COVER GASKET IS LEAKING INTO THE SPARK PLUG WELLS AND MUST BE REPLACED.
SOURCE: lexus ls 400
www.alldata.com - it's $25 for a year-long subscription and gives you troubleshooting charts, parts diagrams, exploded diagrams of every system on the car, etc - it's an online factory service manual. Excellent resource that is well worth the small cost.
SOURCE: buying a 1996 lexus ls 400...
Make a standard check of the car before you buy it.(running components and vital parts)
The LS400 is one great car as long as it was taken care of mechanically, you won't have any problems at all
SOURCE: How do you change the headlight bulb on a 1996 lexus ls 400
I can't tell you exactly how to do it on a lexus but generally bulbs are changed from the rear of the assembly inside the engine compartment. you may have to remove the battery if it is on that side. do not touch the bulb with your fingers as that will shorten it's lifespan.
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