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Old 04 Dec 2013, 11:26 am
MrGeo's Avatar
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Question sparkplugs

I'm replacing the plugs on the PT, 2012, touring, non turbo. Bought Bosch Platinum 2 4314. Trying to do the right thing, could someone please tell me if this was a good choice? also the wing hood emblem came off, I have one waiting for me at the dealer, (cheapest place) but some old adhesive is still there and hard as a rock. I can sand it down some without any damage I think...is it ok to leave some there for better adhesion of the new one? Also I have found thru trial and error 40# air all 4 tires will give the best MPG on my Cruiser mostly 24-25, all HWY 25-26.8 or so, once in a while it may drop to 23. This is an FYI kinda thingy. THX Geo.
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Last edited by MrGeo; 04 Dec 2013 at 11:28 am.
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Old 04 Dec 2013, 11:54 am
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Default Re: sparkplugs

Those plugs should be find and last a bit longer than copper.
Watch your tires - 40# may be good for mileage, but the center of the tires can wear more than the sides....
Gap plugs at 0.040.
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Old 04 Dec 2013, 12:12 pm
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Thumbs up Re: sparkplugs

Quote:
Originally Posted by quicksilverdon View Post
Those plugs should be find and last a bit longer than copper.
Watch your tires - 40# may be good for mileage, but the center of the tires can wear more than the sides....
Gap plugs at 0.040.
Says they are gaped at factory, 2 electrodes gap each at .040?...and yes when I moved the front tires to the rear and rear to front the center showed more wear. Firestone, it looks like the wear will be less $ than gas $. With gas prices the way they are at this time milage kinda outweighs the wear. Thank you for quick reply, could you please direct me to page with info about how to change plugs? Looks like intake manifold would need to come off, will it need new gaskets? And what do you think about the replacement of the Emblem on front.
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Old 04 Dec 2013, 02:29 pm
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Default Re: sparkplugs

I didn't realize they were double electrode - spark will only jump from shortest gap.
Here's spark plug guide:
Spark Plug Guide
Should not need new gaskets.
If old glue is very solid, I think you'll be fine - I'd use 3M foam tape - made for putting on trim.
Use a heat gun to warm up hood & emblem (it'll stick better).
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Old 04 Dec 2013, 02:37 pm
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Default Re: sparkplugs

Mostly what he said^^^^^^


A NOTE:
Gaping of any spark-plugs other then a standard copper single ground electrode should only be done with the proper spark-plug gaping tool and experience in gaping muit- ground or special material composition spark plugs.
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Old 04 Dec 2013, 02:54 pm
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Cool Re: sparkplugs

Quote:
Originally Posted by NitroPT View Post
A NOTE:
Gaping of any spark-plugs other then a standard copper single ground electrode should only be done with the proper spark-plug gaping tool and experience in gaping muit- ground or special material composition spark plugs.
Those .99-'Silver-Dollar' gappers aren't worth 'diddly-squat'!
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Old 04 Dec 2013, 03:49 pm
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Default Re: sparkplugs

Quote:
Originally Posted by randyincctx View Post
Those .99-'Silver-Dollar' gappers aren't worth 'diddly-squat'!
Not on my watch....or engines!


randyincctx likes this.
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Old 05 Dec 2013, 08:05 pm
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Thumbs up Re: sparkplugs

Quote:
Originally Posted by quicksilverdon View Post
I didn't realize they were double electrode - spark will only jump from shortest gap.
Here's spark plug guide:
Spark Plug Guide
Should not need new gaskets.
If old glue is very solid, I think you'll be fine - I'd use 3M foam tape - made for putting on trim.
Use a heat gun to warm up hood & emblem (it'll stick better).
Thanks for the info, and guide. I will let you know how it all turns out. Today I set the tire pressure at 36 and am going to try to do more consistent driving to see if I can improve MPG. Geo. love my PT!
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Old 05 Dec 2013, 08:08 pm
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Thumbs up Re: sparkplugs

Quote:
Originally Posted by NitroPT View Post
Mostly what he said^^^^^^


A NOTE:
Gaping of any spark-plugs other then a standard copper single ground electrode should only be done with the proper spark-plug gaping tool and experience in gaping muit- ground or special material composition spark plugs.
THX, I proly won't gap em because I really want to try the new type plug. I do appreciate all input on the subject. Geo
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Old 05 Dec 2013, 08:12 pm
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Thumbs up Re: sparkplugs

Quote:
Originally Posted by randyincctx View Post
Those .99-'Silver-Dollar' gappers aren't worth 'diddly-squat'!
THanks man, I have some good ones I bought for a bike I had last year. Howbeit I won't gap em, so no prob. Geo. Glad you found a good one for the right price.
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