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Old 07-06-2019, 08:41pm   #1
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Default Dumb idea?

I bought a S10 4.3 new in 1997. A few years ago I heard a rod knock sound and parked it. It will still start and move, etc...but, the knock is still there. I've been kicking around the idea of removing the motor and JUST replacing the main and rod bearings and having the crank turned. That's it. No head work, cam, rings, cylinder, pistons, etc...just the bearings. It's not an easy removal from the YT vids that I have watched. I have pulled motors from old classic cars easily before. This is a different animal with the A/C, cramped engine bay, etc...I don't know who or how it would cost to rebuild the entire motor. I know the ballpark price for a reman. It has around 220k on it.

Would it be foolish to go to all that effort just to replace bearings in hope of making it reliable again?

I don't see many S10's on the road these days. I think they still look cool and serve a good purpose as a small truck with a torque little motor in a small package.
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Old 07-06-2019, 08:48pm   #2
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Can you find a low mileage 4.3L?

Your idea will work but you'd just be "moving" the weakest link
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Old 07-06-2019, 09:42pm   #3
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Can you find a low mileage 4.3L?

Your idea will work but you'd just be "moving" the weakest link
Haven't looked...used motors have always worried me about truth of mileage, condition, etc...
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Old 07-06-2019, 10:33pm   #4
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Since it's just been setting, what about all the parts that have degraded. Tires for sure and what about all the other rubber bushings and even the gaskets.
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Old 07-07-2019, 08:02am   #5
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Growing up "po" that's the way it was done. Replace the minimum. Fix what's broken.

Having moved up to regular "poor", I'd go ahead and get an off the shelf rebuild from a "quickie" shop and give yours as a core.

Baller answer - LS engine swap.
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Old 07-07-2019, 08:22am   #6
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At 220k miles?...all the trouble of just doing crank work?

Pull the motor and don't be foolish.
Decide-----> rebuild/re-man/LS swap
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Old 07-07-2019, 09:57am   #7
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About $3200 thru Jasper motors for a 4.3 with a 3 year 100,000 mile warranty.
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Old 07-07-2019, 11:24am   #8
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Originally Posted by 09CTSV View Post
About $3200 thru Jasper motors for a 4.3 with a 3 year 100,000 mile warranty.
How much is a 22 year old S-10 going to be worth, even with a new/rebuilt motor?
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Old 07-07-2019, 01:30pm   #9
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Quote:
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How much is a 22 year old S-10 going to be worth, even with a new/rebuilt motor?
That depends entirely on what the truck means to the OP. Heirloom or other history can make any object priceless, and worth the investment.
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Old 07-07-2019, 01:32pm   #10
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ATK long block from Jeg's $1553 with free freight. Listing says 1987-1991... carbureted VS throttle body???
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Old 07-07-2019, 08:07pm   #11
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Quote:
Originally Posted by boracayjohnny View Post
Since it's just been setting, what about all the parts that have degraded. Tires for sure and what about all the other rubber bushings and even the gaskets.
Yep, it really needs EVERYTHING at that mileage. The A/C quit, steering got sloppy (idler arm), I changed brake pads, but never had rotors surfaced. Others I know that is about the mileage the transmission also gives up ($3k)

Quote:
Originally Posted by aerovette View Post
Growing up "po" that's the way it was done. Replace the minimum. Fix what's broken.

Having moved up to regular "poor", I'd go ahead and get an off the shelf rebuild from a "quickie" shop and give yours as a core.

Baller answer - LS engine swap.
Hmm....I'll have google LS in a S10. I know it's popular with full size.

Quote:
Originally Posted by Strats-N-Vettes View Post
At 220k miles?...all the trouble of just doing crank work?

Pull the motor and don't be foolish.
Decide-----> rebuild/re-man/LS swap
Yep, probably would blow a head gasket after all that. I was just thinking of something that I would be comfortable doing. I haven't rebuilt a motor in 30 years...and that was under supervision from a ASE mechanic. I understand everything that needs done. Just afraid of screwing something up being a one man show.

Quote:
Originally Posted by bill_daniels View Post
How much is a 22 year old S-10 going to be worth, even with a new/rebuilt motor?
Sentimental. I always enjoyed driving it. They were great trucks. Small, good power, driving, etc...for one person.

Quote:
Originally Posted by markids77 View Post
That depends entirely on what the truck means to the OP. Heirloom or other history can make any object priceless, and worth the investment.
Yep. Just always enjoyed it.

Quote:
Originally Posted by markids77 View Post
ATK long block from Jeg's $1553 with free freight. Listing says 1987-1991... carbureted VS throttle body???
1997, throttle body. There even seems to be a difference depending on the VIN for that year(s). Maybe something to do with the computer? The shops I got a quote from wanted the VIN. I can't remember...maybe some with a 'W' or something in the VIN were different.
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Old 07-08-2019, 06:49pm   #12
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It seems there are pre roller lifter engines, roller motors and mixed metric or all metric construction. Lots of choices out there at wildly variable pricing.
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