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Old 01-27-2009, 10:55 AM   #1
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I know it's in here somewhere but I can't seem to find it.
I have a 1999 Coachman class A I just bought, I'm sure that the spark plugs have never been changed; this guy never had the air cleaner changed.
It has a ford V10, runs just fine; no missing, How often should the spark plugs be changed?
I've been told to just run it till it starts to miss, that just don't sound right.
My wife has an Oldsmobile, the manual says 100,000 miles for plugs.
OK whats the correct answer.
.
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Old 01-27-2009, 11:39 AM   #2
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I would take it to a Ford truck dealer and have them do it (and check plug wires). Then they are responsible for their actions or problems that arise. I say this because the '99 - '01 V10s had issues with the spark plugs. Some were overtorqued by the factory and will not come out (they break/strip). You should find chat on the web to support this (search Ford forums for V-10 spark plug issues).
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Old 01-27-2009, 02:40 PM   #3
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I would take it to a Ford truck dealer and have them do it (and check plug wires). Then they are responsible for their actions or problems that arise. I say this because the '99 - '01 V10s had issues with the spark plugs. Some were overtorqued by the factory and will not come out (they break/strip). You should find chat on the web to support this (search Ford forums for V-10 spark plug issues).
good idea-----but how often to change?
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Old 01-27-2009, 05:50 PM   #4
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As long as the engine is running well, the plugs are good for at least 100k miles. But if you have some engine problem and the plugs get fouled as a result, they should be replaced as part of the repair of the other problem.
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Old 01-28-2009, 04:58 AM   #5
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my 2 cents again: I would get the plugs all changed and the wires checked as a peace-of-mind thing. Yes, maybe they can last 100K miles, but it's all boils down to what you think you can tolerate.
I had the plugs and wires changed on my '99 F350 at 30K miles. They also told me they used Marine grade NeverSieze on the new plug threads, just in case I ever wanted to pull the plugs again. My plugs didn't look too bad, but judging by their appearance, I was glad I changed them at 30K miles.
My dealer had my truck for two days to get the job done; -but they had the tools & techniques so they didn't have to use heli-coil inserts with the new ones.
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Old 01-28-2009, 05:19 AM   #6
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As long as the engine is running well, the plugs are good for at least 100k miles. But if you have some engine problem and the plugs get fouled as a result, they should be replaced as part of the repair of the other problem
I think I'll go along with---if it ain't broke don't fix it. my motorhome has 36000 miles on it; runs good; if anyone else has a suggustion, I'll be glad to here from you.
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