how to change spark plug, can not get spark plug cover off. How did i get the screw out to take of the cover. Do I need a special tool
Tools Required or used to assist:
-3/4" (I believe, the normal sized one, not the huge one) spark plug socket
-Needle Nose pliers
-Flat head screw driver
-#5 Hex Wrench
-12mm wrench with closed end on one side
-Spark plug gap tool with wire gap checker
1. Buy replacement spark plugs. I bought Bosch Platinum+2 plugs for
about $4/apiece from an online parts store, but from what I've read, the
Platinum+4 are much better. They provide much more complete ignition
and offer a noticeable improvement in mileage. One anecdote I heard was a
friend of a friend who went from 20mpg to 24mpg on his BMW 3-series.
The platinum+4 are only $1 more, so the possible performance improvement
is well worth it.
2. Get your tools.
3. Remove the engine vanity cover by removing the three bolts near the
base (front) of the engine. You'll need a hex wrench to get these out.
See the picture below for location. Once the screws are out, rotate the
lexus logo 90? and the cover should come off pretty easily.
4. Practice removing one of the easier spark plugs in the front.
5. First, disconnect the electrical connector from the spark plug tube
head by pressing the end with your thumb and using a flat-head
screwdriver to pry the connector off. Remove the spark plug tube screw
using a socket wrench or equivalent. The tube should now slide out. See
the picture below for reference. That was practice, now put it back in
and replace the screw holding it in place.
6. Clean the area around each spark plug tube using a hand towel,
pressurized air canister, or both. This includes the spark plugs behind
the intake manifold. This will be tough because you will have to work by
hand, but it is important.
7. Start by removing the most difficult spark plugs - in this case, the
back ones. It is better to do the easy ones last, in case - for some
reason - you give up or can't get the back plugs out. The back plugs are
located behind the intake manifold (see picture below). You'll have to
get to them through the opening indicated by the '''blue arrow. You can
make this more accessible by removing what I think is the cruise control
bracket. Loosen the nut indicated by the '''yellow arrow and remove the
bolt indicated by the '''red arrow. Warning: these might be very
8. Repeat step 5 starting with the rear right spark plug (rear
right when facing the front of the car), followed by the rear center,
then rear left. When removing the spark plug, be sure not to let any
dirt or debris fall into the engine. It could cause sever damage. The
best thing to do is to remove the old spark plug, briefly inspect it,
and immediately begin installing the new spark plug.
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May 30, 2011 |
Lexus ES 300 Cars & Trucks