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  #1 (permalink)  
Old 20 Jun 2010, 06:45 pm
demon666's Avatar
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Default Plug Gaping Info Help

I just changed my plugs and wires went great first time on a PT Cruiser took me 2 1/2 hours lost a few bits in the process but went well .

My question is I dont know anything about the gaping of spark plugs

normally when at Napa they will ask me make and model they give me what i need and i install them .

As I was taking off the old spark plugs i checked each one and 2 plugs were gaped at .065 and 1 at 0.68 the other one at 0.70 thats way higher then 0.40

I did gap mine at 0.40 my engine dose sound diffrent

can some one tell me what the diffrence is 0.40 to 0.70 would be ?
why is it better to gap a 0.40 then 0.65 ?


Thanks for all that helped with my past question made my car confidence meter go up.
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Old 21 Jun 2010, 02:02 am
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Default Re: Plug Gaping Info Help

Not sure what year your car is, but your gap was well over specification.

I looked up a 2001 and a 2009, close to each end of the spectrum. According to Chrysler, gap specifications for the 2001 are between .048 and .053. Specs for the 2009 are .040 for the NA and .050 for the turbo.
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Old 21 Jun 2010, 02:19 am
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Default Re: Plug Gaping Info Help

I have a 2004 ptc like i said before the engine sounds different .

So the gap depends what year your car it is? If so I might have to redo the plugs.. Every one kept saying make sure you gap them at .040 ...

Like i said the old plugs were all gaped at 60+

what dose the gap do, make it use more/less fuel

am not to sure if I did the right thing.
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Old 21 Jun 2010, 02:29 am
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Default Re: Plug Gaping Info Help

.040 is slightly below spec for a 2004. Chrysler spec is between .048 and .053.

If you have the wrong gap, you'll get worse gas mileage, the engine will run rougher than normal, and you'll have premature spark plug wear.
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Old 21 Jun 2010, 02:37 am
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Default Re: Plug Gaping Info Help

ITs my own fault , for not double checking... my repair book didint have them people kept telling gap at .040.. ill change them in a month again .
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Old 21 Jun 2010, 04:58 am
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Default Re: Plug Gaping Info Help

Wait a minute.

We've been telling everyone to gap the non-turbo plugs at .040in because Chrysler came out with a TSB changing their original instructions that said to gap them at .050in.

TSB 08-008-04 noted a new Champion spark plug specification and a new gap - 0.040 inches replacing the prior 0.050 inches. The correct plug is RE16mc which replaces REMcc5 to prevent cold-weather fouling.


I and several others have been using the smaller gap for years with no harm. I personally have over 50,000 miles on the Champion Double Platinum (7570) and they are still performing great. My PT starts up first time, every time and there's no hesitation, stumbling and the idle is as smooth as the day it came off the assembly line.
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Last edited by CREWZIN; 21 Jun 2010 at 05:01 am.
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Old 21 Jun 2010, 05:33 am
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Default Re: Plug Gaping Info Help

I live in Alaska am I ok with the .040 cold weather ?
they were gaped at .067 had my PTC for 2 winters with no start problems

one of the things i liked about my ptc never gave me a problem in the winter.
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Old 21 Jun 2010, 11:09 am
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Default Re: Plug Gaping Info Help

Crewzin, that TSB ONLY applies to 2003 and 2004 models. I supposed if the OPs model is a 2004 it would apply to him.

This doesn't apply to all PTs, only 03-04 models.

Spark plugs should be gapped at manufacturer specs for your model year, not based on a TSB that only affects two models years.

With the exception of the TSB affecting 03-04 models, Chrysler specifies a gap of .048-.053 all the way through 2008. 08-10 get a gap of .040.
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Last edited by heifetz17; 21 Jun 2010 at 11:15 am.
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Old 21 Jun 2010, 12:22 pm
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Default Re: Plug Gaping Info Help

Quote:
Originally Posted by heifetz17 View Post
Crewzin, that TSB ONLY applies to 2003 and 2004 models. I supposed if the OPs model is a 2004 it would apply to him.

This doesn't apply to all PTs, only 03-04 models.

Spark plugs should be gapped at manufacturer specs for your model year, not based on a TSB that only affects two models years.

With the exception of the TSB affecting 03-04 models, Chrysler specifies a gap of .048-.053 all the way through 2008. 08-10 get a gap of .040.
I have an 04 so just curious why those two years?
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Old 21 Jun 2010, 01:18 pm
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Default Re: Plug Gaping Info Help

Quote:
Originally Posted by heifetz17 View Post
Crewzin, that TSB ONLY applies to 2003 and 2004 models. I supposed if the OPs model is a 2004 it would apply to him.

This doesn't apply to all PTs, only 03-04 models.

Spark plugs should be gapped at manufacturer specs for your model year, not based on a TSB that only affects two models years.

With the exception of the TSB affecting 03-04 models, Chrysler specifies a gap of .048-.053 all the way through 2008. 08-10 get a gap of .040.
First I heard it only applied to '03 - '04 models - I thought It was for all '01 on up.......

I would go with .040 - gap widens with time....
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