How long is too long for spark plugs?
#1
Lexus Test Driver
Thread Starter
How long is too long for spark plugs?
So just passed 217,000 miles on my '99 GS400 and still have the OEM plugs. Indy looked at them at 200,000 miles and said they were fine. In 17 years the car has never had a problem starting, starts on first turn every time. My only concern is, should I change them just as a precaution? I'm heading in for my second TB/WP change at 220,000 and could change them then, or wait since they are not causing me an issue.
#2
Lexus Test Driver
iTrader: (8)
OEM from factory, 217,000 on them? I say replace them, keep the originals and put them up for auction at a museum...
ok honestly. I say replace them (since they should be changed at no later than 20,000). Keep the originals. If the car runs worse, put the originals back in and keep rollin... For just a few bucks, replacing them is worth it. At the same time, replace the wires too; and if you have the extra money, replace the coils as well... I would bet you'll see a difference in performance and at the very least, fuel economy. Just because they look fine, doesnt mean they're working at 100%
ok honestly. I say replace them (since they should be changed at no later than 20,000). Keep the originals. If the car runs worse, put the originals back in and keep rollin... For just a few bucks, replacing them is worth it. At the same time, replace the wires too; and if you have the extra money, replace the coils as well... I would bet you'll see a difference in performance and at the very least, fuel economy. Just because they look fine, doesnt mean they're working at 100%
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#9
Lexus Test Driver
Thread Starter
Just wanted to provide an update, finally changed out the original OEM spark plugs at 224,318 miles. Had a second timing belt / water pump change a few months ago so all service is up-to-date.
#10
Were they difficult to get out?
We had a 1997 Ford truck that had 127k miles and original plugs and several of them broke off in the head while we were trying to get them out. I have no desire to ever go through that again.
We had a 1997 Ford truck that had 127k miles and original plugs and several of them broke off in the head while we were trying to get them out. I have no desire to ever go through that again.
#11
Lexus Test Driver
Thread Starter
Nope not at all, I've had my Indy check them a few times before. I just changed them as a precaution. I figured after 18 years it was time lol.
#12
Rookie
iTrader: (2)
OEM from factory, 217,000 on them? I say replace them, keep the originals and put them up for auction at a museum...
ok honestly. I say replace them (since they should be changed at no later than 20,000). Keep the originals. If the car runs worse, put the originals back in and keep rollin... For just a few bucks, replacing them is worth it. At the same time, replace the wires too; and if you have the extra money, replace the coils as well... I would bet you'll see a difference in performance and at the very least, fuel economy. Just because they look fine, doesnt mean they're working at 100%
ok honestly. I say replace them (since they should be changed at no later than 20,000). Keep the originals. If the car runs worse, put the originals back in and keep rollin... For just a few bucks, replacing them is worth it. At the same time, replace the wires too; and if you have the extra money, replace the coils as well... I would bet you'll see a difference in performance and at the very least, fuel economy. Just because they look fine, doesnt mean they're working at 100%
#14
Lexus Test Driver
Thread Starter