Does any one have any issues or info. with this Engine. (New 8.1) I'm looking to order a 2500HD with 8.1 & Allison. I've heard their are oil problems? Any info. will be helpful.

The only thing I have heard of are some issues with the valve guide seals (easily replaced if need be), not with any of the engines internals. It is based on the 454 block/engine which is a well proven and sturdy engine. The early 6.0's and 5.3's had internal issues with piston slap problems when cold (piston sized to small for bore from factory and it "rattles" in the bore until it heats up and expands some). Edited by: snoman

The only thing I have heard of are some issues with the valve guide seals (easily replaced if need be), not with any of the engines internals. It is based on the 454 block/engine Have yet to see any problems with valve guides or seals. There is a known issue and tsb relating to the intake bolts. New bolts with sealer. Motor is known to use some oil, 1 qt to 2000 is not uncommon. Only thing that the 8.1 shares with the 454 is the 'big block' name

The only thing I have heard of are some issues with the valve guide seals (easily replaced if need be), not with any of the engines internals. It is based on the 454 block/engine Have yet to see any problems with valve guides or seals. There is a known issue and tsb relating to the intake bolts. New bolts with sealer. Motor is known to use some oil, 1 qt to 2000 is not uncommon. Only thing that the 8.1 shares with the 454 is the 'big block' name

THe valve guides seal probelm is not unique to big block and usually takes some time to surface (40 to 60k miles or more over a few years). The seals have been a long time issue for GM but they are getting better and Like a said earlier, they are not hard to replace if a problem developes. It is the internal issues that suck and the 8.1 has none that I know of.

Yeah one major problem: Constantly get ask if its a 6.0 or dmax. I call it the forgotten motor. Then I say its a 496 ci, they go "is that factoryhttp://www.dieselplace.com/forum/smileys/Confused.gif". Next year I am putting on 6.0 liter decals, on side or the hood. http://www.dieselplace.com/forum/smileys/Evil Smile.gif


It does use some oil, due to the gm's new way PVC system, tends to suck more oil vapor in. The intake bolt issue was on 01's. Other thing is that 04' and later have been derated to 330hp, due to tighter emmisons.


Other wise motor is rock soild. Interesting note is that, this motor came from the marine side of GM. So it was built and design for continuious mid to high rpms operation of the marine industry.


So far my motor and trans combo have been problem free!!!! And it been mudding, wheeling out in the weeds, on fire once, drag racing, truck pulling, And has been liking my engine mods so far. http://www.dieselplace.com/forum/smileys/Big Smile.gif


Or could wait until 2007 for the new V10<!--
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Edited by: 8100hammer

They powered a lot of motor homes for many years too (454's). I would not hold my breath for bigger and better because as California's new CO2 limits take hold and spread it will take a bigger bite than fuel prices and turbo diesels are very bad about CO2 emmisons compared to gassers because of all the air they consume in operation. If it goes national, it could spell the death of the diesel pickup as we know it know in 10 years. There is no "converter" for CO2 emmisions.

Does any one have any issues or info. with this Engine. (New 8.1) I'm looking to order a 2500HD with 8.1 &amp; Allison. I've heard their are oil problems? Any info. will be helpful.





Wearing out the fuel filler door hindge.





Mac http://www.dieselplace.com/forum/smileys/Geek.gif

In the wifey's Yukon XL.....


Besides the cold engine "rattle", drinks 1 qt of oil every 2,000 miles, and gets 8-9 MPG..... it's been problem free. Edited by: Blinky

Currently getting 12.5 to 13.5 intown and 14 to 15 highway with current setup in sig. Just don't drive with lead foot.


Far as diesels are concerned My 1996 Arctic Cat ZRT 600 Snowmoblie has a wider powerband than the dmax. (okay trying to start something here)Hence is why Gm came with a 5-speed auto for HD truck, and not using the 4l80e with can be strengthen for the abuse. Also switch to amsoil and redid the intake bolts, Have yet to add oil between oil changes.


Also to mention that, amazing cold weather starting ablitiy, Turn the key and drive mentaliy, and motor that can take a amazing amount of abuse,My truck is living proof.


Also why is that, you see a nice medium motorhome chassis 9 times of 10 it has a gasser in it??? (not trying to start anything) &lt; =text/&gt; <!--
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Edited by: 8100hammer

Currently getting 12.5 to 13.5 intown and 14 to 15 highway with current setup in sig. Just don't drive with lead foot.


Far as diesels are concerned My 1996 Arctic Cat ZRT 600 Snowmoblie has a wider powerband than the dmax. (okay trying to start something here)Hence is why Gm came with a 5-speed auto for HD truck, and not using the 4l80e with can be strengthen for the abuse. Also switch to amsoil and redid the intake bolts, Have yet to add oil between oil changes.


Also to mention that, amazing cold weather starting ablitiy, Turn the key and drive mentaliy, and motor that can take a amazing amount of abuse,My truck is living proof.


Also why is that, you see a nice medium motorhome chassis 9 times of 10 it has a gasser in it??? (not trying to start anything)&lt;

You and I think alike on this subject and lets leave it at that. They both have their pluses and minuses. BTW my stock and rare 1978 Kawasaki Intriguer 440 snowmobile has a fairly narrow power band too. It goes like a bat out of hell between 4500 and 6000 or so though. I have 3 cherry Kaw sleds of different models and you sure get some funny looks when you ride up on one. Almost bought a 550 Kaw Interseptor this past spring but it needed to many body parts and new carbs too which are rare. In the early 80's they were the fastest sled made and still are very quick and lite weight for the power they have (well over 110hp) and even today would give most 700's or so a very hard time in a flat out drag race. I need one to round out my collection one day.

Oh my god, the BS never stops spewing outa your mouth huh...first trucks now sleds...a 78 Kawi 440 with well over 110hp.....please put the pipe down....and give most 700's a run for their money...I got a couple of F7's for you to line up with.....that is if you can step out of the 80's long enough.


8.1http://www.dieselplace.com/forum/smileys/Hug.gif

Oh my god, the BS never stops spewing outa your mouth huh...first trucks now sleds...a 78 Kawi 440 with well over 110hp.....please put the pipe down....and give most 700's a run for their money...I got a couple of F7's for you to line up with.....that is if you can step out of the 80's long enough.


8.1http://www.dieselplace.com/forum/smileys/Hug.gif

You cannot even quote me correctly. It also shows you how little you know about old Kaw sleds as they were ahead of their time and well engineered from engine to gear case to track drive design. (I know becuase I have had a lot of old sleds apart over the years, since the 70's, and Kaws were built) A 550 Interceptor was "the" sled to have for many years and would easily take most modern 700's on a drag. It was and still is one bad sled. It was small and light weight, very over powered and far faster than it looked. (much lighter than most modern sleds too) It would not ride as good as a new sled on rough ground or corner as well but it will sure eat up a striaght line. Kawasaki has long known how to make a 2 stroke run and had the fastest production bike for many years in the 70's with the Kaw H2 (750 triple 2 stroke)I would like to have a Interceptor someday because it was kinda like to old Z28 of sleds and to see the look on people faces like yours when you take off and leave them behind while they are trying to figure out what happened. I do not live in the 70's or 80's but I do remember them and newer is not always better.

Oh my god, the BS never stops spewing outa your mouth huh...first trucks now sleds...a 78 Kawi 440 with well over 110hp.....please put the pipe down....and give most 700's a run for their money...I got a couple of F7's for you to line up with.....that is if you can step out of the 80's long enough.



8.1http://www.dieselplace.com/forum/smileys/Hug.gif




You cannot even quote me correctly. It also shows you how little you know about old Kaw sleds as they were ahead of their time and well engineered from engine to gear case to track drive design. (I know becuase I have had a lot of old sleds apart over the years, since the 70's, and Kaws were built) A 550 Interceptor was "the" sled to have for many years and would easily take most modern 700's on a drag. It was and still is one bad sled. It was small and light weight, very over powered and far faster than it looked. (much lighter than most modern sleds too) It would not ride as good as a new sled on rough ground or corner as well but it will sure eat up a striaght line. Kawasaki has long known how to make a 2 stroke run and had the fastest production bike for many years in the 70's with the Kaw H2 (750 triple 2 stroke)I would like to have a Interceptor someday because it was kinda like to old Z28 of sleds and to see the look on people faces like yours when you take off and leave them behind while they are trying to figure out what happened. I do not live in the 70's or 80's but I do remember them and newer is not always better.





i love it lol if kawi is so good where are their sleds now? i got 500 bucks that you sled would not touch a f-7 in 1000 feet. they run mid 90's stock in 1000 feet. my sled with minor work runs 105 mph in 1000 feet. my uncles 700 viper tripple ran 98 on a good day.


lol 550 110 hp fast in the same line. hey dude where you from i want to race your 550. i bet you will be eating snodust.

Once again snoman, you shouldn't open your mouth when you have no clue who you are speaking to....I'm up on my vintage sled specs....are you??? apparently not....your little 440 is at best 60hp (and thats being generous)and your high on a pedistal 550 comes in at a high and mighty 85hp tops....a far cry from the 110 plus you boast about.


8.1http://www.dieselplace.com/forum/smileys/HiHi.gif

MFD573: Sorry man, I didn't not mean for it to start this way. To the point the 8100 vortec will provide you years of good serivce.
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TOO bad they don't have any turbo diesel sleds, this could get entertaining http://www.dieselplace.com/forum/smileys/hihi.gif

TOO bad they don't have any turbo diesel sleds, this could get entertaining http://www.dieselplace.com/forum/smileys/hihi.gif





Yeah thats what I want is even narrower powerband. http://www.dieselplace.com/forum/smileys/smiley5.gif
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TOO bad they don't have any turbo diesel sleds, this could get entertaining http://www.dieselplace.com/forum/smileys/hihi.gif





Yeah thats what I want is even narrower powerband. http://www.dieselplace.com/forum/smileys/smiley5.gif
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Not to mention how much "fun" they would be to start too. Can you
imagine trying to start and run one in the yellowstone area in the dead
of winter at 30 or 40 below? I guess you could keep it in the
house, never shut it off outside and hope the fuel does not gel or
wax. I lived in Montana in the mid 90's and know their winters
well and never had any problem with any of my "gasser" vehicals or
sleds starting. They tried aircraft diesels years ago but that
was a flop too. They could not handle the cold at high altitudes and
had poor power to weight ratios too.

Recently traded in a 8.1 with 47,000 miles. Never had a problem with engine. Quiet and smooth running. Fuel mileage was 13 to 14 on a good day running 70 mph with about 2,000 lb in the bed. In town traffic, I thought I was supporting at least one Middle East Shiekdom and keeping their yacht running. 6 to 7 mpg with no load. It just loved to get filled up. Got a D/Max and it gets 13 mpg in traffic and 17 to 18 mpg on the road. The 8.1 is a good engine and will do whatever you ask of it. Like the writer several pieces up said, you will wear out the fuel door before the engine goes.

I love my 8.1 in my work truck. Has 62,000 miles and no problems or oil consumption. This isn't a problem so far, but does anyone have the lifter noise? This only happens when its warm outside and I think the oil is thinner. The service manager said they know about this in the 8.1s and the 6.0s, but no TSBs yet. Truck weighs in about 11,000lbs and gets 7-9 mpg overall. Great engine/tranny combo but not as good as dmax/tranny combo.

I have had a intermittant problem with lifter tick with my 2000 5.7 in
a k3500. It is very light and only one lifter when it does it when hot
and not always either. It has done it off and on since new. If a
diesel ticked, you would never hear it unless maybe the lifter was
completely collapsed.