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5.3 Vortec Owners....a question #4591849
12/02/17 09:57 AM
12/02/17 09:57 AM
Joined: Apr 2017
Posts: 395
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 395
Mississippi
son's '10 Avalanche is approaching 100K miles. Chevy calls for spark plug and wire change out, but the truck is running fine. Really not at a point that we can get these changed out right now.

So how long have you gone on plug/wire changeout b4 it began to run badly?

Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4591866
12/02/17 10:18 AM
12/02/17 10:18 AM
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
Just change them out, the farther the spark has to jump across the electrodes and travel through older higher resistance wires puts much more stress on the coils. You can push it off until you have problems, but be prepared to spend more on coils while they're in there. Plus its most likely going to fail at a very inopportune time.


2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4591884
12/02/17 10:37 AM
12/02/17 10:37 AM
Joined: Oct 2015
Posts: 439
MN
TmanP Offline
TmanP  Offline
Joined: Oct 2015
Posts: 439
MN
I know it's not the same engine, but I bought my 3.8 Buick with 137k and had the original plugs changed at 140k. They were fine, and I didn't notice any difference, it wasn't running poorly or anything. I'd probably vote to wait till you have the time/money to do it, as long as that's not ten years in the future. If you do it yourself, it should be in the $75-1000 range for the plugs and wires.

Try and use the ACDelco plugs (and wires) it came with, they are regarded as the best.


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4591898
12/02/17 10:51 AM
12/02/17 10:51 AM
Joined: Oct 2008
Posts: 19,080
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,080
Sunny Florida
Originally Posted By: Speak2Mountain
son's '10 Avalanche is approaching 100K miles. Chevy calls for spark plug and wire change out, but the truck is running fine. Really not at a point that we can get these changed out right now.

So how long have you gone on plug/wire changeout b4 it began to run badly?


I have raised and killed dozens of the 5.3 in Silverados we use here for business. They will run well far past the suggested limit of 100k miles for plugs. In about the last 6 or so trucks we have had two that went nearly 200k miles still running well. No coils lost either despite all the warnings. In my whole history here with GM individual coils I have only replaced 2.

So relax, and save your dough. Those suckers are expensive!


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
Re: 5.3 Vortec Owners....a question [Re: SteveSRT8] #4591914
12/02/17 11:13 AM
12/02/17 11:13 AM
Joined: Apr 2017
Posts: 395
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 395
Mississippi
you right, muchas gracias!!!!!!!!!!!!!!!!!!!

Re: 5.3 Vortec Owners....a question [Re: SteveSRT8] #4592035
12/02/17 01:35 PM
12/02/17 01:35 PM
Joined: Jun 2003
Posts: 17,341
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,341
Deplorable in apple valley, ca
Originally Posted By: SteveSRT8
Originally Posted By: Speak2Mountain
son's '10 Avalanche is approaching 100K miles. Chevy calls for spark plug and wire change out, but the truck is running fine. Really not at a point that we can get these changed out right now.

So how long have you gone on plug/wire changeout b4 it began to run badly?


I have raised and killed dozens of the 5.3 in Silverados we use here for business. They will run well far past the suggested limit of 100k miles for plugs. In about the last 6 or so trucks we have had two that went nearly 200k miles still running well. No coils lost either despite all the warnings. In my whole history here with GM individual coils I have only replaced 2.

So relax, and save your dough. Those suckers are expensive!
no melted cats either?


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4592088
12/02/17 02:32 PM
12/02/17 02:32 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
At least re-gap the plugs to alleviate any stress on the coils.

Re: 5.3 Vortec Owners....a question [Re: Merkava_4] #4592127
12/02/17 03:24 PM
12/02/17 03:24 PM
Joined: Apr 2017
Posts: 395
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 395
Mississippi
good deal, thx

Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4592217
12/02/17 05:11 PM
12/02/17 05:11 PM
Joined: Feb 2011
Posts: 1,264
Wishin' I was in Wi
mjk Offline
mjk  Offline
Joined: Feb 2011
Posts: 1,264
Wishin' I was in Wi
Hey,

I have an 01 Tahoe. Just changed my plugs today, did them all in 45 minutes, and I am NO mechanic. ha ha.

Little tip on plug #8... put a 3/4" socket on the end of your spark plug socket. Perfect clearance to do that particular plug....

Re: 5.3 Vortec Owners....a question [Re: Speak2Mountain] #4593775
12/04/17 10:17 AM
12/04/17 10:17 AM
Joined: Dec 2006
Posts: 1,690
NY, NY
NYEngineer Offline
NYEngineer  Offline
Joined: Dec 2006
Posts: 1,690
NY, NY
I have an 09 Suburban with 140,000 miles on it. At 100,000, I did the plugs and wires. Truck was running fine but when I swapped in the new stuff, it ran like new again.

Re: 5.3 Vortec Owners....a question [Re: Chris142] #4594621
12/05/17 06:25 AM
12/05/17 06:25 AM
Joined: Oct 2008
Posts: 19,080
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,080
Sunny Florida
Originally Posted By: Chris142
Originally Posted By: SteveSRT8
Originally Posted By: Speak2Mountain
son's '10 Avalanche is approaching 100K miles. Chevy calls for spark plug and wire change out, but the truck is running fine. Really not at a point that we can get these changed out right now.

So how long have you gone on plug/wire changeout b4 it began to run badly?


I have raised and killed dozens of the 5.3 in Silverados we use here for business. They will run well far past the suggested limit of 100k miles for plugs. In about the last 6 or so trucks we have had two that went nearly 200k miles still running well. No coils lost either despite all the warnings. In my whole history here with GM individual coils I have only replaced 2.

So relax, and save your dough. Those suckers are expensive!
no melted cats either?


Had a 6.0 in a 3500 van that melted a cat and plugged up hard. had 185k miles on her. But that was without any misfires, so we wrote it off as fuel injectors or just old age. Those trucks work hard...


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix

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