Either if you want to do a regular sparkplug replacement or simply tune your Lexus IS 300 engine up with some performance ones, you’ll have to get your hands a little dirty.
Since the first generation Lexus IS has a short front end, the engine bay is kind of cluttered and you will need to unmount some parts to gain access to the sparkplugs. Basically, you will need the new set of sparkplus and set of wrenches. Here are the steps:
Leave the engine cool off
Open the hood
Remove the screws from the engine cover and take it out
Pop out the admission piping
Remove the four bolts from the timing gear cover and take it out
Disconnect the electrical connections from the throttle body
Disconnect the throttle cable
Remove the whole throttle body
Unplug the electrical connections from all the sparkplugs
Replace them with the new ones
Put everything back following these steps backwards.
This is a DIY guide and, as such, you must be aware the procedures described here involve some risks. autoevolution cannot be held responsible for any possible damage that might result while following this guide.
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