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03-16-2020, 01:47 AM
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#1
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Senior Member
Brand: Thor Motor Coach
Model: Chateau 31L
State: Florida
Posts: 2,063
THOR #12189
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90k Plugs. Fact or Fiction?
I've been reading where the V10's plugs are good to 90k. Call me skeptic.
Does anyone have experience with the claim? If not, does anyone know which cylinder may run the hottest? I can use it as my checkup; everything else is equal.
Thanks.
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03-16-2020, 01:52 AM
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#2
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,390
THOR #7035
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Most plugs are good to 100 K miles in the age of unleaded gasoline.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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03-16-2020, 02:50 AM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 29M
State: Texas
Posts: 2,728
THOR #11781
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I watch a lot of youtube videos where guys flip old import cars. I'm talking cars with 150k plus miles. They always change the plugs and most of the time they are factory original. If the owners manual says the plugs are good for 90k, then I would believe it.
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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03-16-2020, 10:44 AM
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#4
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Senior Member
Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,422
THOR #15553
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I pit 130,000 on a set. remove, clean and reset.
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2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
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03-16-2020, 11:19 AM
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#5
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Senior Member
Model: 25.2 Axis
State: Arizona
Posts: 839
THOR #3471
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What are spark plugs lol
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03-16-2020, 11:21 AM
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#6
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Axis/Vegas Enthusiast
Brand: Thor Motor Coach
Model: Axis 24.4
State: Michigan
Posts: 9,837
THOR #1150
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I'm on my 3rd V-10 haven't changed a set of plugs yet (first two went 138,000 miles and 75,000 miles respectively before I got rid of them).
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03-16-2020, 04:26 PM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Chateau 31L
State: Florida
Posts: 2,063
THOR #12189
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Awesome. Thanks again.
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03-16-2020, 04:40 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,183
THOR #6411
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Quote:
Originally Posted by The_Breeze
I've been reading where the V10's plugs are good to 90k. Call me skeptic.
Does anyone have experience with the claim? If not, does anyone know which cylinder may run the hottest? I can use it as my checkup; everything else is equal.
Thanks.
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Back in the day, ethylene bromide was added to leaded gasoline. This was to help remove lead from the combustion chamber and spark plugs. It worked so well that it removed the steel parts of the plugs also. After 3 to 5 thousand miles the plug were eroded enough to cause misfiring under load. Removing ethylene bromide and lead from pump gas did away with spark plug erosion.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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03-16-2020, 04:58 PM
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#9
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Site Team
Brand: Entegra
Model: Accolade 37TS
State: South Dakota
Posts: 8,781
THOR #1469
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My 2014 Ford Expedition Service Schedule said to change the plugs at 105,000 miles.
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Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054
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03-16-2020, 08:41 PM
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#10
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,328
THOR #6903
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You are more likely to have a coil fail now on higher mileage units
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03-16-2020, 08:46 PM
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#11
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Senior Member
Brand: Still Looking
State: Texas
Posts: 6,187
THOR #2121
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I figured equivalent wear must depend on engine load and RPMs to some degree, so for my relatively small and light van with tall gearing, I let it go to around 160,000 miles — don’t recall exactly.
I did keep close eye on fuel economy to see if there was any decline, and on emissions reports generated during state inspections. And also subjective performance. There was no noticeable decline.
I put it off because it’s expensive (could not do it myself at the time), plus I wasn’t sure I was keeping van. While I could have waited longer, I went ahead and had them replaced.
If the same V10 was in a motorhome weighing twice as much as my van, and getting half the mileage, I would have done it much sooner.
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03-21-2020, 06:18 PM
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#12
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Senior Member
Brand: Keystone
Model: Cougar 30 RLS 5th wheel
State: Colorado
Posts: 288
THOR #2204
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Really hard to tell. I only kept my 2015 Thor Hurricane 34E with V10
for 3 years and 15K miles.
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Phil Saran
2019 Cougar 30 RLS 2012 Ram 3500 4x4
Colorado
I like to wander and I'm not lost!
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03-21-2020, 06:48 PM
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#13
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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I can remember my Dad buying spark plugs by the case...
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03-21-2020, 09:00 PM
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#14
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Junior Member
Brand: Thor Motor Coach
Model: Freedom Elite 26 HE
State: Florida
Posts: 7
THOR #18091
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2005 F-250 V-10 Plugs
We're new to MHs but we have a 2005 F-250 V-10 being used mostly for a 4 horse trailer. Being old school points, plugs & condenser kinda guy, I didn't believe the owners manual when it said 100k on the plugs so I said I'm going to go to the failure point. 261k miles it threw a #1 & #9 misfire code. Changed out the plugs & coil packs ($750 in parts & all day!). Runs like new! No visible damage to the plugs so I don't know If it was plugs or coils.
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03-21-2020, 10:12 PM
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#15
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Junior Member
Brand: Thor Motor Coach
Model: 25.3
State: Texas
Posts: 23
THOR #16640
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Being a retired Ford Master Technician, I can say that 100K is very common. I have seen higher mileage with no issues, as stated previously coil failure is more common to cause an intermittent miss, usually the boot is the failed part.
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D.Sweet
Chappell Hill, Texas
FMCA Member - F477775
Current Coach - 25.3 Vegas - TOGO RoadLink C2 -
Previous Coach - American Tradition 42P
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03-21-2020, 10:20 PM
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#16
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Member
Brand: Thor Motor Coach
Model: Chateau 31W
State: Ohio
Posts: 33
THOR #17621
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I have a 2003 Expedition with a 5.4. plug change @ 159000. I know it's not a v-10 but basic same block with extra up and down thingys...lol
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03-22-2020, 12:55 AM
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#17
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Member
Brand: Thor Motor Coach
Model: Quantrum RC25
State: California
Posts: 66
THOR #14016
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It all sounds good. But wait until you see the bill when the sparkplugs are frozen in the engine block and/or break off. I will never wait until 100K to change plugs again.
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03-22-2020, 03:00 AM
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#18
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Senior Member
Brand: DRV
Model: 38 RSB3
State: South Dakota
Posts: 2,280
THOR #1658
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If the engineers say your good to 90k, then you are.
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2016 DRV38RSB3
2015 Ram 3500 Regular Cab DRW CTD Asian trans 410 rear
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03-22-2020, 10:56 AM
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#19
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Junior Member
Brand: Thor Motor Coach
Model: Freedom Elite 26 HE
State: Florida
Posts: 7
THOR #18091
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TSB 08-7-6/V-10 Plugs
Quote:
Originally Posted by Junodtim
It all sounds good. But wait until you see the bill when the sparkplugs are frozen in the engine block and/or break off. I will never wait until 100K to change plugs again.
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Ford put out a TSB in 2008 on changing the plugs. It covers all Triton engines not just the V-10. Follow it EXACTLY & most likely you won't break the plug. It also says to put anti-seize on the new plugs to prevent them from seizing. AutoZone has the toolkit you can "rent" in case you do break one. I also recommend OEM replacement plugs-at 261k miles, why wouldn't you? 👍
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03-22-2020, 12:07 PM
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#20
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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I'm starting to think that my Sprinter-chassied RV has more advantages than I originally thought...
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