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  1. #1

    Default 8.1 Beast of a motor.

    So I killed my old work truck and just recently purchased the truck in my Sig.

    Can anyone give me any info on the 8.1 motor that is in this truck. It only has 23,000 heavily worked miles, so it might be more equivalent to 75,000 or so.

    I just want to know if there has been any issues, good or bad, and what I should expect for durability.
    2001 Chevy 3500HD, Cab and Chassis. 2wd, 8.1 liter vortex 8100 motor. 15000 lbs GVWR, 19.5 inch rims, and a 4L80E auto transmission.

    Accessories.
    10 foot Rugby Dump bed with drop sides, Flink under tail-gate salt spreader, 9 foot Fisher trip edge plow, and central hydraulics ran by belt driven pump under the hood. And a bunch of strobe lights.

  2. #2

    Default

    The biggest gripe I've heard about the 8.1 is it's a thirsty engine, it'll run with power to spare all day long, as long as you got the money to feed it.
    So far after playing around with a few I hav'nt seen any upgrades that'll help in the MPG area, but there are quite a few more ponies that can be pulled out of the engine. Surprisingly the HP upgrades dont hurt the mileage much more than it is.

  3. #3

    Default

    Quote Originally Posted by tbplus10 View Post
    The biggest gripe I've heard about the 8.1 is it's a thirsty engine, it'll run with power to spare all day long, as long as you got the money to feed it.
    So far after playing around with a few I haven't seen any upgrades that'll help in the MPG area, but there are quite a few more ponies that can be pulled out of the engine. Surprisingly the HP upgrades don't hurt the mileage much more than it is.

    MPG's aren't an issue. The truck is strictly a work truck and will rarely get used for any Daily Driver purposes. Any time it will get used it will either be hauling something, pulling something, or plowing something.

    Heck, even the the 1/4 cab cover isn't very aerodynamically correct, and the truck weighs in at 9000 lbs empty.

    So what is a good mod/tuner for Horse Power. So far I'm happy with the motor output as it has plenty of power even when loaded down with 3.5 tons of material, but I wonder what this motor is truly capable of.


    Here is a pic. I don't know why but the image is smaller than I sized it.

    Click image for larger version. 

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    Here is a link to the same photo I loaded on another site.

    http://www.lawnsite.com/attachment.p...0&d=1267987077


    Last edited by White Gardens; 03-21-2010 at 04:20 PM.

  4. #4

    Default

    Bump,

    Does anyone else have an opinion on this motor ???

  5. #5
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,613

    Default

    Probably not much opinion because no real problems. Maybe the usual GM intake manifold gasket leaks-no huge deal and latest gaskets usually cure it.

    I would bet it is less expensive to run than the diesels. They seem to require expensive parts/repairs and your motor will probably last a long time.

    Like tbplus10 said- it is thirsty-but since it is strictly a work truck-who cares.

    You should do ok- cheap parts- cheap to repair-reliable- relatively low miles- indifferent to mpg- you are good to go.
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  6. #6
    Sr. Apprentice
    Join Date
    Mar 2009
    Location
    Kalispell, Montana
    Posts
    37

    Default

    We had one here in our fleet. We used it here to hauil horses, quads and snomobiles. We had almost 100,000 miles on before it was replaced. We had more problems with the Allison Transmission and the body falling apart than the engine. I think that we did the intakes and that solved the oil consumption issues.
    Scott
    Kalispell, MT :zzz:

    2004 Chevy Suburban-Bone Stock
    2006 Chvey Silverado 1500HD

  7. #7
    Master Mechanic SupplySgt's Avatar
    Join Date
    Feb 2010
    Location
    Middle TN, displaced Okie
    Posts
    764

    Default

    Great motor. I think everyone covered the major stuff. On a side note. I know somebody that's thinking about dropping one of those into a 2nd Gen Camaro.
    93 Suburban (Southern Slayer): TBI 350, 4L60E
    73 Z28 Camaro: L82, TKO 600

    KJ4CLI



    "...Death smiles at us all, all a man can do is smile back..."

  8. #8

    Default

    Quote Originally Posted by Montana View Post
    We had one here in our fleet. We used it here to hauil horses, quads and snomobiles. We had almost 100,000 miles on before it was replaced. We had more problems with the Allison Transmission and the body falling apart than the engine. I think that we did the intakes and that solved the oil consumption issues.

    Been awhile since I have looked at this thread and thanks to everyone who replied.

    Sounds like it's a good motor overall. So what was the deal with the intake and oil consumption Montana ??? I've been told that this motor likes to use oil, and that's just the nature of the beast.

    Also, and I will correct my Sig, but it turns out I have the Chevy 4L80E transmission. And I might have an issue with that but I'm not sure yet.

  9. #9

    Default

    One of my all time fav's. The best thing i like about it is it's engine and the comfort it gives.




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    Last edited by leomartin6; 03-25-2011 at 06:04 AM.
    leomartin6

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