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Spark Plug Wear #4595082
12/05/17 03:18 PM
12/05/17 03:18 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
If you pull one of your spark plugs out and measure the electrode gap, is that a good indication of the gap for the rest of the spark plugs ?

Re: Spark Plug Wear [Re: Merkava_4] #4595088
12/05/17 03:23 PM
12/05/17 03:23 PM
Joined: Jun 2003
Posts: 17,341
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,341
Deplorable in apple valley, ca
yes


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Re: Spark Plug Wear [Re: Merkava_4] #4595100
12/05/17 03:28 PM
12/05/17 03:28 PM
Joined: Sep 2015
Posts: 1,523
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,523
USA
Certainly if you take one out and find it's worn out, time to replace them all.

Re: Spark Plug Wear [Re: Merkava_4] #4595164
12/05/17 04:17 PM
12/05/17 04:17 PM
Joined: Sep 2007
Posts: 966
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 966
TX, USA
within a certain range, yes. Unless you can measure it to the super micro units likw 0.0000000000000000000000000000000000001 micrometers

Last edited by JMJNet; 12/05/17 04:18 PM.

  • 2017 Toyota Sienna
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Re: Spark Plug Wear [Re: JMJNet] #4595172
12/05/17 04:29 PM
12/05/17 04:29 PM
Joined: Jan 2010
Posts: 1,736
Rochester, NY
NateDN10 Offline
NateDN10  Offline
Joined: Jan 2010
Posts: 1,736
Rochester, NY
Originally Posted By: JMJNet
within a certain range, yes. Unless you can measure it to the super micro units likw 0.0000000000000000000000000000000000001 micrometers

10^-43 meters is very small indeed. 100 million times smaller than the Planck length, which is believed to be the shortest meaningful length.

(Yes, I realize you were using hyperbole but I couldn't help myself from converting to scientific notation!)

Last edited by NateDN10; 12/05/17 04:31 PM.

2016 Mazda3 - 20,000 mi.
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Re: Spark Plug Wear [Re: Merkava_4] #4595253
12/05/17 05:56 PM
12/05/17 05:56 PM
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
With your luck you would pull the one the previous owner replaced 3 mo ago looking for a misfire.


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Re: Spark Plug Wear [Re: Trav] #4595317
12/05/17 07:13 PM
12/05/17 07:13 PM
Joined: Aug 2010
Posts: 5,648
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,648
Champlain/Hudson Valley
Thanks above for doing the math. Counting all those zeros would've killed my eyesight.

Re: Spark Plug Wear [Re: Merkava_4] #4595490
12/05/17 10:30 PM
12/05/17 10:30 PM
Joined: May 2016
Posts: 717
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 717
Canada

On late model engines:

On Iridium tipped plugs, I'd go by mileage. Reason is that there's a tiny
hard to see iridium pad on the ground electrode that's super thin, when it burns
away at about 100K miles, the gap will look OK and even gage OK, but as the iridium
disappears off the ground, you'll suddenly burn away the plug to a misfire and damage
the Cats. The fuel mixture is lean and hot so the soft steel in the ground electrode
won't take it.


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