12-16-14, 12:30 PM
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- Lexus IS GS: How to Replace Spark Plugs
Step by step instructions for do-it-yourself repairs
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Anybody know how to change the spark plug?
10-22-12, 01:35 PM
#3
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Remove the old plugs slowly. If one feels very tight then try snugging it up a bit tighter before trying to loosen it again. In other words, seesaw it a bit if have to do so.
When removing a coil do not pull it straight off. Try to wiggle it back and forth as you pull.
Check the gap on the new plugs and CAREFULLY adjust if needed. Do not ASSUME the gaps are correct as they are often not.
Use anti-seize on the threads of the new spark plugs.
Use dialectric grease on the inside of the coil boots before reinstalling the coils onto the plugs.
When installing the new plugs do NOT use a socket and extension. Use a short length of fairly stiff vacuum line that has an inside diameter small enough to create a tight fit on the end of the spark plugs and start them into the threads by that method. This assures that you will not strip or cross-thread anything.
Snug the plugs up by hand. Most long time mechanics tighten plugs by feel as that is far safer than a Ft. Lbs torque wrench or following shaky specs given in a manual. All that is required of the plugs is to run them down all the way and then give them a fraction of a turn.
When removing a coil do not pull it straight off. Try to wiggle it back and forth as you pull.
Check the gap on the new plugs and CAREFULLY adjust if needed. Do not ASSUME the gaps are correct as they are often not.
Use anti-seize on the threads of the new spark plugs.
Use dialectric grease on the inside of the coil boots before reinstalling the coils onto the plugs.
When installing the new plugs do NOT use a socket and extension. Use a short length of fairly stiff vacuum line that has an inside diameter small enough to create a tight fit on the end of the spark plugs and start them into the threads by that method. This assures that you will not strip or cross-thread anything.
Snug the plugs up by hand. Most long time mechanics tighten plugs by feel as that is far safer than a Ft. Lbs torque wrench or following shaky specs given in a manual. All that is required of the plugs is to run them down all the way and then give them a fraction of a turn.
10-22-12, 02:12 PM
#4
I'm going to assume that its for a gs350, if it is then it's the same procedure as the is350
https://www.clublexus.com/forums/is-...g-service.html
it's going to be similar for the gs430,gs460 just two more spark plugs to take out
https://www.clublexus.com/forums/is-...g-service.html
it's going to be similar for the gs430,gs460 just two more spark plugs to take out
10-22-12, 02:51 PM
#5
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On my gs460, it is a lot tighter being that the heads are closer to the sides of the engine bay. Looking through the repair manual, you need to remove the coil pack seals that are on the valve covers. This lets you tilt the coils packs enough to remove them. Pretty harmless if you have some mechanical ability.
10-23-12, 01:11 PM
#7
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10-23-12, 04:34 PM
#8
Remove the old plugs slowly. If one feels very tight then try snugging it up a bit tighter before trying to loosen it again. In other words, seesaw it a bit if have to do so.
When removing a coil do not pull it straight off. Try to wiggle it back and forth as you pull.
Check the gap on the new plugs and CAREFULLY adjust if needed. Do not ASSUME the gaps are correct as they are often not.
Use anti-seize on the threads of the new spark plugs.
Use dialectric grease on the inside of the coil boots before reinstalling the coils onto the plugs.
When installing the new plugs do NOT use a socket and extension. Use a short length of fairly stiff vacuum line that has an inside diameter small enough to create a tight fit on the end of the spark plugs and start them into the threads by that method. This assures that you will not strip or cross-thread anything.
Snug the plugs up by hand. Most long time mechanics tighten plugs by feel as that is far safer than a Ft. Lbs torque wrench or following shaky specs given in a manual. All that is required of the plugs is to run them down all the way and then give them a fraction of a turn.
When removing a coil do not pull it straight off. Try to wiggle it back and forth as you pull.
Check the gap on the new plugs and CAREFULLY adjust if needed. Do not ASSUME the gaps are correct as they are often not.
Use anti-seize on the threads of the new spark plugs.
Use dialectric grease on the inside of the coil boots before reinstalling the coils onto the plugs.
When installing the new plugs do NOT use a socket and extension. Use a short length of fairly stiff vacuum line that has an inside diameter small enough to create a tight fit on the end of the spark plugs and start them into the threads by that method. This assures that you will not strip or cross-thread anything.
Snug the plugs up by hand. Most long time mechanics tighten plugs by feel as that is far safer than a Ft. Lbs torque wrench or following shaky specs given in a manual. All that is required of the plugs is to run them down all the way and then give them a fraction of a turn.
That sound good. It was super easy on my GS430, I was worried because everyone made it sound hard. A few different sized extensions did wonders......took me 15 minutes.... Literally....not even rushing....double check ur gaps
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