 Spark plug change intervals?, Are plugs time "sensitive?"? |
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| draganc |
 Jan 14 2015, 04:24 PM
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Senior Member  Group: Members Posts: 725 Joined: 2-November 09 From: central new jersey Member No.: 11,000 Region Association: North East States  |
Let's assume your engine is well running.
How often do you have to change the plugs if you drive only 4-5k mls per year? Any difference between older air cooled and h2o engines? Thanks for the inputs! |
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| Cap'n Krusty |
Jan 15 2015, 11:13 AM
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Prior to 1974, the recommended plug change interval was 6K miles. That changed to 10K in 1974. I suspect with modern lead-free fuels, 15K wouldn't be out of order. You should still do a maintenance service at the intervals recommended for your car because points and filters get used up, and changing the plugs at the same time makes good sense, as they need to come out for a compression test and the plug gasket shouldn't be reused (replacement gaskets used to be available). Sand blasting the plugs REDUCES their lifespan. If you don't know the difference between a "maintenance service" and a "tune-up", bad things can happen to your car and they'll be a total surprise.
The Cap'n |
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Posts in this topic
draganc Spark plug change intervals? Jan 14 2015, 04:24 PM
r_towle Every year, sometimes twice per year. Jan 14 2015, 04:50 PM Tom_T Usually that's due to inspection when it shows... Jan 14 2015, 05:02 PM aircooledtechguy Don't sweat the plugs. I would change then at... Jan 15 2015, 10:12 AM Porsche930dude Do you guys use a smear of anti-seize on them? Id ... Jan 15 2015, 06:53 PM
Joe Sharp I left the plugs in my Harley for 55K miles and th... Jan 15 2015, 07:11 PM |
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