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Old July 9th, 2012, 02:58 PM   #1
BuckinBronco
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Default Thoughts on Chevy 5.7 auto

Not sure if this the right forum...don't flame me if it's wrong.

But, looking at going to a 95 silverado. Just lookin' for some thoughts on the motor and possibly the truck in general assuming that everything's runnin' fine.
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Old July 9th, 2012, 03:01 PM   #2
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Know a lot of people with high mileage 350's. The trucks and motors seem to last forever.

Grandpa has a 95 with 265k and runs like a champ!
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Old July 9th, 2012, 03:02 PM   #3
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I think they are extremely rare and ubber expensive. It will be almost impossible to fine any repair or replacement parts for it.

if only there was a Chevy forum on this site
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Old July 9th, 2012, 03:03 PM   #4
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just buy one.
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Old July 9th, 2012, 05:40 PM   #5
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domestic moters our all garbag.
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Old July 9th, 2012, 06:06 PM   #6
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some are good some are bad. depends on how it was taken care of.

my buddies got a 95 sierra with 315,000 on the body. motor and trans are unknown. theyve each been replaced more than once. as for the body, the cab mounts are shot, the bed mounts are shot, the back bumper is 75% rusted through. and if any weight is added to the bed the driveshaft rubs the cab.
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Old July 9th, 2012, 08:30 PM   #7
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Whoever moved this, thanks.

And from what I've been told its a Tennessee truck with 90k on rebuilt motor and trans.
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Old July 9th, 2012, 08:34 PM   #8
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Quote:
Originally Posted by BuckinBronco View Post
Not sure if this the right forum...don't flame me if it's wrong.

But, looking at going to a 95 silverado. Just lookin' for some thoughts on the motor and possibly the truck in general assuming that everything's runnin' fine.
I hear from my GM friend and my boss (40 year mechanic) that the 350 NON vortec engines are definetly not the best motors. If you actually use them for work like hauling / towing and whatnot, you'll usually get 100k miles out of it before they wear out. Vortecs are awesome engines and I've seen upwards of 300k life span.
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Old July 11th, 2012, 01:27 AM   #9
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Stay away from the '95!!!!!!!!! Start your search at '96! The '95's were a one year tranny, half & half OBD1/OBD2, mid transition year hodge podge!
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Old August 27th, 2012, 08:33 AM   #10
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my buddy had a non vortec 350 with 350000 plus . ran great but he couldnt keep trans together . but he jumped test all the time
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Old August 27th, 2012, 08:58 AM   #11
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Quote:
Originally Posted by CHVYPWR View Post
Stay away from the '95!!!!!!!!! Start your search at '96! The '95's were a one year tranny, half & half OBD1/OBD2, mid transition year hodge podge!
Sure your not talkind about s series ? 1995 s10s were one year only.

1994 was the switch for silveradoes as far as I know.My good freind owns a 1994 silverado with a 4l60 and obd 1. His wife drives a 1994 with a 4l60E and it is obd2. Her truck has 380,000 miles on original drivetrain.
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Old August 27th, 2012, 09:11 AM   #12
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Quote:
Originally Posted by chevyk10 View Post
I hear from my GM friend and my boss (40 year mechanic) that the 350 NON vortec engines are definetly not the best motors. If you actually use them for work like hauling / towing and whatnot, you'll usually get 100k miles out of it before they wear out. Vortecs are awesome engines and I've seen upwards of 300k life span.
I think you freind boss is an wrong. The differences between vortec motors and non vortec motors are not going to show up in durability.The vortec motors make more power swinging the same bottom end parts,so the vortec motor would be less durable.
The tbi motors with a flat tappet cam might be considered less durable then the roller cam ones,with todays junk oil. Iirc all tbi motors had roller cams by 1994.

The vortec motors spit out intake gaskets all the time.Some early tbi motors had headgasket issues in the late 80s early 90s.

I have had dozens of small block chevs,the vortec is a more powerfull motor,but I would not say it is more durable.
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Old August 28th, 2012, 05:51 PM   #13
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Only thing that is different on a vortec is the heads and intake bottom end is the same if you look up a89 350 and a 98 350 its the same exact crank
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Old August 31st, 2012, 12:01 PM   #14
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96 was a one year tranny in the full size trucks 93 was the first year for the 4l60e
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Old September 12th, 2012, 03:46 PM   #15
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they made this design of engine for almost 50 years.

as for you're "GM expert mechanic boss" he sounds like an idiot.
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Old October 23rd, 2012, 04:25 AM   #16
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I own a 96' K1500 z71 350 vortec with some minor mods turning a built 4L60E with a 241c behind that. I love it. I had drove a friends 95' on Friday and remembered why I went vortec. Major differences would be the heads, intake, fuel system, as well as cylinder wall finish, rings, ignition system and of course OBD 2.

They are notorious for intake gaskets, fel pro offers a problem solver kit that actually solves the problem. Providing you completely flush the cooling system to get rid of the DEX-Cool

The fuel system is a demon of its own fuel pumps are known to just decided not to work one day pretty much without warning, but a quality replacement pump or performance pump fixes that. They are also known to have issues with the "spider" or fuel injector disaster, same problems the 4.3 has with the number one poppet straw rubbing in the intake. About 1 out of every 20 or so actually have to be replaced before 300k

The ignition system is a rather efficient design, actually a derivative of the crossfire ignition out of the vets. number one problem is cap and rotor corrosion due to it general placement partially in the tunnel. Steam created by the exhaust gets trapped in the cap. I have yet to find and efficient way to stop it other than di-electric grease on assembly and buy lifetime warranty and replace it every spring.

Vortec's were also higher compression motors than the TBI's, roller cam's and rockers, finer micro finish on the cylinder walls, and chrome molly rings rather than black oxides. The full roller set up actually is better for the motor oils of today, as flat tappet motors require an oil with a high ZDDP count to ensure proper lubrication. ZDDP quantities were greatly reduced in oil in the late 90's as it actually makes the rollers stick.

I have almost 150K on this build and 26Xk on the body. I have yet to have an intake leak, never lost a leg of the original spider, replaced the fuel pump once with a warlbro kit, and I drive her like I stole 'er everyday. Something I would never try with a tired old TBI
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