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Old 05-06-2010, 05:54 PM   #1
Mayhem.Evol
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Engine lifespan

About how many miles would a 5.3 in a 04 last before anything major was to be done? I know there are variables such as how it was maintained, but just a rough estimate would be nice.

Appreciate your time.
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Old 05-06-2010, 07:33 PM   #2
clinebarger
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Re: Engine lifespan

Quote:
Originally Posted by Mayhem.Evol View Post
About how many miles would a 5.3 in a 04 last before anything major was to be done? I know there are variables such as how it was maintained, but just a rough estimate would be nice.

Appreciate your time.
200,000 is easy even on one thats not maintained very well. Just seviced a 03 with 310,000 miles on it still runs good, Its a fleet truck & gets abused.
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Old 05-07-2010, 11:31 AM   #3
torkerjr
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Re: Engine lifespan

Quote:
Originally Posted by Mayhem.Evol View Post
About how many miles would a 5.3 in a 04 last before anything major was to be done? I know there are variables such as how it was maintained, but just a rough estimate would be nice.

Appreciate your time.
My 2000 z71 has about 186,000 still runs stong. Has rear main seal leak but thats all.

smoke
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Old 05-07-2010, 01:06 PM   #4
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Re: Engine lifespan

My 99 wth a 5.3 bought when it had 24000 on it. now has 227000 and have not even change the plugs in it. change oil and filters thats it. still gets 19 mile to the gallon
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Old 05-08-2010, 05:44 PM   #5
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Re: Engine lifespan

I really like reading threads like this one...bought my '05 at 95k and now have 125k on it after only 10 months. Hope mine goes to 300k!
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Old 05-08-2010, 11:39 PM   #6
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Re: Engine lifespan

You will probably get 300k from the motor if you change the oil on a regular basis. The transmission, eh...not so much.
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Old 05-09-2010, 03:51 PM   #7
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Re: Engine lifespan

I would think 300K would be easily obtainable. Probably by that point you will want something different anyway.
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Old 09-12-2011, 02:19 PM   #8
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Re: Engine lifespan

Anybody know life span for 4.8L?
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Old 09-12-2011, 02:37 PM   #9
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Re: Engine lifespan

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Anybody know life span for 4.8L?
Since a 4.8 is just a destroked 5.3 I have to say the same as a 5.3, maybe a little better...not much.
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Old 09-12-2011, 06:33 PM   #10
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Re: Engine lifespan

I'm betting any of the newer LS based engines (4.8/5.3/6.0) will run up to the 300,000 mile mark.

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Old 09-12-2011, 09:06 PM   #11
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Re: Engine lifespan

From my research when I was looking buying and rebuilding my first 4.8 the report I read said miles before a rebuild was designed to be 250,000. So I think you could get 300k to 350k with good maintenance. I took apart my 4.8 at 225k and could see cross hash in the cylinders and the bearings looked good for that kind of miles. The bores were within spec and it just needed a clean up honing.
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Old 09-13-2011, 08:47 AM   #12
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Re: Engine lifespan

i just serivce a fleet truck at work the other day with 380k on it still running storng
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Old 09-23-2011, 12:18 PM   #13
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Re: Engine lifespan

My 99 has 178K on it and still runs like a bat outa he11
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Old 09-23-2011, 03:25 PM   #14
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Re: Engine lifespan

Got 256,000 on my 99 now and decide I would finally give her a set of plugs. She was still running like a top, but thought I would be nice.
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Old 09-23-2011, 10:31 PM   #15
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Re: Engine lifespan

Man I just bought a set of AC delco iridium plugs for my 01 6.0 with 70,000 on it. Kinda regretting buying them after reading this!
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Old 10-05-2011, 12:09 AM   #16
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Re: Engine lifespan

I just put plugs in my 06 company truck with a 160k 6 litre and they had been ran way to long. Had a slight stumble at idle. Electrodes burnt clear down inside the porceline. Owners manual recommended 75k i think. Anyhow i stumbled in here to see if anybody can tell me where the fuel filter is. Not in the line along the frame like i figured. Im not a a late model guy all. Thanks
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Old 10-05-2011, 09:59 AM   #17
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Re: Engine lifespan

Its in the tank...built-in with the fuel pump.
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Old 10-05-2011, 10:30 PM   #18
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Re: Engine lifespan

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Originally Posted by clinebarger View Post
Its in the tank...built-in with the fuel pump.
yea well in that case, its in good shape. putting in the line probably wouldn't have worked for another 80 years anyway. i guess thats why my personal rigs ar 45 years old. thanks for the info.
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Old 10-05-2011, 11:42 PM   #19
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Re: Engine lifespan

My '01 has it inline.
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades)
67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore )
71 CHV C20 402 700r4, atlantic blue SOLD
71 CHV K20 350 SM465, ochre (saved work truck)
71 CHV K20 292 SM465, white, tach, PTO, (future project)
72 CHV K20 350 350th, medium blue (project stocker)
01 CHV K2500hd crew, indigo blue

^3 dont run and the others don't see winter either

'71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642
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Wanted: '70 Chev K20 CST fairly original condition http://67-72chevytrucks.com/vboard/s...d.php?t=476258
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Old 10-17-2011, 03:15 AM   #20
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Re: Engine lifespan

I put 390k on a 5.3 motor in a crew cab work truck. bought it new with 3 miles on it.
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Old 10-17-2011, 08:55 AM   #21
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Re: Engine lifespan

Quote:
Originally Posted by david068513 View Post
I put 390k on a 5.3 motor in a crew cab work truck. bought it new with 3 miles on it.
Nice. I'll keep this in mind when people say they need a diesel because they last longer. The days of huge differences in longevity seem to be gone. Diesels do last longer than gas but if these days you get 300k with a gas, do you need much more longevity? The truck would be pretty tired itself i would think. In the rustbelt, the trucks dissolve within 15years anyways.
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades)
67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore )
71 CHV C20 402 700r4, atlantic blue SOLD
71 CHV K20 350 SM465, ochre (saved work truck)
71 CHV K20 292 SM465, white, tach, PTO, (future project)
72 CHV K20 350 350th, medium blue (project stocker)
01 CHV K2500hd crew, indigo blue

^3 dont run and the others don't see winter either

'71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642
'72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6
Wanted: '70 Chev K20 CST fairly original condition http://67-72chevytrucks.com/vboard/s...d.php?t=476258
--Putting the cart before the horse is a good idea. The horse's rear is nothing I'd like to look at, let alone be positioned aft of--

Last edited by Vintage Windmills; 10-17-2011 at 09:16 AM.
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Old 10-17-2011, 11:08 AM   #22
david068513
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Re: Engine lifespan

Take care of it and it will be fine. That truck still lives and I sold it to someone in town who drives it all the time.
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Old 10-19-2011, 12:19 PM   #23
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Re: Engine lifespan

I put 200k on my '99 4.8L silverado and it ran like a CHAMP when I sold it. I recall having to replace:

tranny rebuild (4l60e)
rearend rebuild
fuel pump replace
alternator

and that's all I can think of. plugs 2 times I think.
the FIRST SET OF BRAKES lasted 100,000 miles.
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Old 10-19-2011, 09:21 PM   #24
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Re: Engine lifespan

310k on my '99 5.3 and 4l60e. Bought it new and change the fluids often. No major problems yet......
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Old 10-21-2011, 08:01 PM   #25
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Re: Engine lifespan

I have 360k on my 92 5.7 Z71. That being said, two Trans, one diff, many water pumps, alts, and starters, and one complete front susp and steering rebuild.
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