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05-13-2024, 12:23 PM | #21 |
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Re: How many miles should spark plugs last?
Swap # 4 plug around w/another plug, drive it around for a while then check the plug that is in #4 and also the plug that was previously in #4.
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05-13-2024, 01:14 PM | #22 |
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Re: How many miles should spark plugs last?
Good Morning all...The other day I realized that my 2016 Jeep Patroit owner's manual suggests changing the plugs at 60,000 miles. I have 74,000 miles...so we changed the plugs...the difference in performance was actually surprising. SO I changed the plugs in my 1931 Model A Tudor which has had the same plugs for the 19 years that I have had the car. The same thing happened...much improved performance. I had not noticed a loss of preformance in either machine...I suggest changing the plugs...Just my personal experience...Ernie in Arizona
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05-13-2024, 01:45 PM | #23 |
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Re: How many miles should spark plugs last?
Reading some of the comments posted here makes getting a Carfax report even more important.
If your driving a modern car that has not had its plugs changed in over 100,000 miles and you think it runs like new? What else have you not had serviced? What does the manufacture recommend for service? Do you care? I stand by my comment. “Model A Ford owners are known to be cheap”. Shade tree mechanics don’t always fix things correctly. Our cars were always well maintained. When it was time to sell, condition was never a question. Mechanically, they were 100%. 60 years, never broken down on the side of the road. To each his own. |
05-13-2024, 03:02 PM | #24 | |
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Re: How many miles should spark plugs last?
Quote:
Good idea. #4 was the culprit. Now, I’ll change the rest of them. For what it’s worth, I’m moving from Motorcraft TT10 plugs to Champion 518 (W18) plugs. The electrodes on the new plugs are much stiffer (to the point this at the plugs want to bend my gapping tool). I don’t know what other differences are likely, but it appears that I am past the miss. Sent from my iPhone using Tapatalk |
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05-13-2024, 03:36 PM | #25 |
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Re: How many miles should spark plugs last?
Here's a couple I have!
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05-13-2024, 04:44 PM | #26 |
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Re: How many miles should spark plugs last?
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RotorWrench in Post #19 said that the spark plug tester he used for airplanes put 120 psi on the plugs. Higher pressure air is more resistant to electrical current than lower pressure air. So a plug that is operating OK on top of the head may not work OK when under the pressure of compression.
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05-13-2024, 06:07 PM | #27 |
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Re: How many miles should spark plugs last?
(Warning: tangent ahead) Gary in WA - Those little compressed air-powered abrasive spark plug cleaners brought me back to 1974. I was working as a mechanic’s helper at a Kawasaki motorcycle dealer in an era when they had a full range of bikes, both street and dirt, but only one had a four stroke engine, the rest having two strokes. These were relatively advanced in that you didn’t mix the oil into the gasoline, every model had “automatic oil injection”, a fancy term for a little plunger pump run off the crank. Motorcycle sales were booming, meaning most of the customers were buying their very first bike, and many were unfamiliar or uncomfortable with the necessary practice of keeping the revs high so the plug (or plugs) wouldn’t foul. So every Monday we got lots of customers bringing in their bikes, baffled about what happened to the pep of their brand new toy. Pull the plug(s) and they were, predictably, black with oil. A few seconds in the plug cleaner made them shiny again, blow out any remaining abrasive grit, check the gap, and they were on their way again. Perhaps the sales guy instructed them to wring it out? I don’t know. I don’t know how other shops operated, but that plug cleaner was used so often we had it mounted to the wall like the pencil sharpener was in elementary school. One pretty big guy brought in his little 125cc scrambler. The plug was fine but the fiber surfaces of the multi-plate clutch were almost completely gone. Turned out he knew all about keeping the revs up, but he was reluctant to downshift. So he just kept the throttle pinned and slipped the clutch. A lot. Fixed under warranty.
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David in San Antonio 1930 ('31?) Deluxe "Wretched Roadster" Restored 1957 Alamo A’s Club Last edited by David in San Antonio; 05-13-2024 at 06:10 PM. Reason: Edited to indicate the little bike under the big guy was a single cylinder. Just one plug. |
05-13-2024, 06:21 PM | #28 |
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Re: How many miles should spark plugs last?
Good choice. I have been running W-18 Champions (518) for years.
Last edited by Y-Blockhead; 05-13-2024 at 08:06 PM. Reason: Misspelling |
05-13-2024, 06:33 PM | #29 |
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Re: How many miles should spark plugs last?
That link doesn’t show anything like a tool.
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05-13-2024, 06:44 PM | #30 |
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Re: How many miles should spark plugs last?
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05-13-2024, 06:46 PM | #31 | |
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How many miles should spark plugs last?
Quote:
The reason I was reluctant to change plugs was that I was looking for the culprit that caused the issue in the first place. I was thinking replacing the plugs could mask some other problem that I had not found yet. Sent from my iPhone using Tapatalk Last edited by shew01; 05-13-2024 at 06:57 PM. |
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05-14-2024, 07:34 AM | #32 |
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Re: How many miles should spark plugs last?
Shew 01 - Yes, they are sand blasters. Maybe not sand but your choice of medium. We followed up the blasting by blowing the plug by unsnapping the airline that ran the cleaner and blew out any remaining media from the plug. Took all of 60 seconds. That will be $5.04 including tax.
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05-14-2024, 10:54 AM | #33 |
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Re: How many miles should spark plugs last?
Yes blow out good no problem. on all my 3X plugs i take apart, and tape off porcelain etc not to glass bead certain areas of plug and use my glass bead.
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05-14-2024, 11:11 AM | #34 |
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Re: How many miles should spark plugs last?
post deleted since problem found
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"It ain't what you know for certain that gets ya in trouble. It's what ya know for certain that just ain't so!" Last edited by Rob Doe; 05-14-2024 at 11:37 AM. |
05-14-2024, 12:20 PM | #35 |
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Re: How many miles should spark plugs last?
Studebaker 1961 Owner's Manual: See attached. If Studebaker said it, it's good enough for me!
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05-14-2024, 04:19 PM | #36 | |
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How many miles should spark plugs last?
Quote:
Very interesting. Thanks for sharing. If I applied the 10,000 mile rule to Champion 3X plugs, that would get pricy. I think I’ll stay with the Champion 518s (W18s). Sent from my iPhone using Tapatalk |
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05-14-2024, 04:24 PM | #37 |
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Re: How many miles should spark plugs last?
There’s other plugs less expensive and run just as good or better than the 3X’s
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05-14-2024, 09:25 PM | #38 |
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Re: How many miles should spark plugs last?
Check the distributor cam or replace with a new one also check the distributor shaft bushings for wear
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