TheDieselStop.Com Forums: 8V92 Detroit Temporary Archives General Diesel Pages: 1 TwinCreek Member Member # 33123 Reged: 07/03/03 Posts: 87 Loc: Kentucky 8V92 Detroit #1925994 - 08/02/04 09:30 AM Would like to learn the good and bad about 6V92 and 8V92 engines used in Bluebird motorhomes from mid 80's. Thanks marvin LMJD Member Member # 12336 Reged: 03/25/01 Posts: 3158 Loc: Cody, Wy Re: 8V92 Detroit #1926082 - 08/02/04 10:40 AM They can be a good reliable engine. It's a tradition for any truck mechanic and/or truck driver the make fun of Detroit Screamers, but most will also admit (including myself) that they're pretty dependable. My experience is that the 92 series didn't have as many head cracking problems that the 53 and 71 series had. Every 'wannabe' will say how bad they leak oil but they don't any more than any other engine. They have 2 air box drains that drip oil but that's not an engine problem, it was designed that way.
Nov 3, 2018 - Nothing at least to me runs or sounds like a old Detroit! I've had the pleasure to drive several fire trucks with the Detroit diesel engines in them. The Dunning Kruger effect is real. To buy a new semi as a glider kit and install a 12v71 or a 12v92, heck I'd even settle for an 8v92 Silver in marine trim.
If I remember right, the later 92's had the drains returning the oil to the pan. Hopefully GoneFishen will give you better info, he's still working on them, but I retired some years back. As far as difficulty, I always thought they were easy to work on for a V configuration truck engine, other that the fuel lines going into the passengers' side cylinder head. Plus if you don't use 3M weatherstrip adhesive to glue the big cyl. Head quad ring at the corners you can be in a world of hurt.
They don't use head gaskets, just quad rings and fire rings. TinyBear Member Member # 41792 Reged: 04/11/04 Posts: 194 Loc: Toronto, Canada Re: 8V92 Detroit #1926472 - 08/02/04 03:10 PM I actualy like these motors and find them very intresting.
I am just starting in the trade as i am only goin on my 3rd year of my apprentice ship. My start in the trade was at a shop that rebuilt/sold many of these engins. They do leak a bit (i seen mostly the older 71 series but seen a few 92) and there is a humerous saying that states if a Deroit stops leaking its out of oil. They also have many nick names like green grenades (92 usually are painted silver but the 71 were almost all green) as a untrained mechnic (from what i understand) could easily have the engin run itself up in the RPM till it blew. Me and another member (nickleinonen) on the site experianced this first hand in school when we left the infamous buffer (rpm hunting adjustment) screw turned in a little too much as we started the engine it took off sending a shiver down you spine we were lucky we prepared and closed the air flap down and had a fire extiguisher ready. These engins if taken care of are simply amazing and offer great HP # for the time in a small pakage.
Nothing in the diesel worl can rev like the two strokes and nothing will ever sound nerly the same. They are relialbe durable power plants and can be very versitile as there use ranged from tanks, boats,trucks/buses and trains to a world speed record trucks. I unfortuantly do not have as much experiance working with them as id like too but there pobly plenty here that can help you out with more indepth questions.
LMJD Member Member # 12336 Reged: 03/25/01 Posts: 3158 Loc: Cody, Wy Re: 8V92 Detroit #1926678 - 08/02/04 05:40 PM Quote: I actualy like these motors and find them very intresting. Yea, you can strip the block bare, turn it around and put it back together, there's no difference front to rear. In some trucks, cabovers, most of the accessories, power steering pump, alternator, etc, are driven off the back of the engine instead of the front. Some series, maybe all, can be set up to run clockwise or counter clockwise. I think there's still a lot of them around here and there. There's a 8V71 cabover pulling a big fertilizer tank around here that you can hear coming from 1/2 mile away. I saw a 3 53 or 3 71 in a paver yesterday on a highway job.
Yes, you can get in deep doo-doo setting the rack if no one's warned you what not to do. I haven't touched one in years, and retirement is NOT over-rated, but I still have my two little injector height step gauges. 99SD Member Member # 40608 Reged: 03/21/04 Posts: 27 Re: 8V92 Detroit #1927062 - 08/02/04 09:24 PM The 6V92's were 300 or 350 hp and mated with either an MT654 trans, or an MTB654 trans, and one big throttle delay, which, was usually misadjusted or disconnected after it left bluebird. The 6V92 wanderlodges were not that spectacular.
The 8V92's were rated at 475 hp, and were either DDEC I or DDEc II engines mated with an HTB748/741 or and HT755. Many had Jake brakes as an option - but left the factory with a switch for either Jake Brake or Trans retarder, but not both.
Yep you guessed it. This switch often went bad after leaving the factory. One thing for sure with either of these engines - don't tow a light colored car behind it!
Beautiful white tow cars often look like dalmations after a trip!!! Either will be a nice riding coach. And built to last!! Gone Fishen Member Member # 1001 Reged: 04/28/99 Posts: 1930 Loc: Lost Wages, Nevada Re: 8V92 Detroit #1927449 - 08/03/04 01:30 AM Are you going to buy it?
What is it do you want to know? DO NOT RUN THE AIR BOX DRAINS BACK TO THE OIL PAN. Unless you want to buy an overhaul with a crankshaft and block. Ok, it is a 2 cycle, Members stated about right on Horsepower. Engine series you asked about is most likely not electronically conroled. It has a mechanical governor on it. If it is in a motor home you said it was it most likely has jake brakes.
Low will be R bank and of course hi will be both banks. Make sure that the motor home has been driven recently. Try to get info on maintaince ect. Has it just sit for??? Years and not driven or started? If so, change all fluids especially the engine oil AND coolant. Flush out the old diesel if possible.
Do not let the engine idle to much, try to keep it at fast idle when starting and warming up. Note: if your coach does drip from the air-box tubes,slobber tubes sometimes called you can do 2 things. Either install or have installed a 'air-canister kit'. This will route the drain tubes to a small canister while allowing the drains to flow open at idle. Keep in mind that these tubes are usually equiped with a check valve so they will stop pushing air when you operate the engine or are at a n/l operation.
You can add the check valves if not equiped with them. Yes I still work on them. I actually am working on one in the shop now. Ask away questons, I will respond with answers.
Copper Member Member # 5010 Reged: 01/26/00 Posts: 984 Loc: Inverness MT and/or Center CO Re: 8V92 Detroit #1927746 - 08/03/04 09:38 AM Hey, where are the check valves located? I'm thinking my couple don't have them - Gone Fishen Member Member # 1001 Reged: 04/28/99 Posts: 1930 Loc: Lost Wages, Nevada Re: 8V92 Detroit #1929082 - 08/03/04 11:14 PM There should be 2 used on a turbocharged engine. I hope we are talking Vee engine.
Inline only has 1. Look where the air-box drains come off the block. One is usually slightly above the starter bolow the air-box covers.
The other one is usually above the oil coolers on the right side. Now for the fun part. If you have the older style block, the drain holes will be 1/8 inch pipe. The new style blocks will be 1/4 pipe. Run a short pipe nipple to a street tee. Install the special check valve in the male thread end. You can use any kind of drain hose cheap stuff with a #6 female swivel.
I like to have the drain tubes extend below the oil pan to eliminate the drain mess. The check valves will allow the air to flow at idle, maybe at high idle. The pressure at any kind of load will close the valves. The air cannister has tubes to have the air-box drains enter it. The air is directed out the bottom of the cannister. There is a tube in the bottom that goes almost to the top of the cannister to catch the residue coming out the drain tubes.
There were a couple of motorhome drivers that made several with coffee cans and brillo pads for a catch-all. TwinCreek Member Member # 33123 Reged: 07/03/03 Posts: 87 Loc: Kentucky Re: 8V92 Detroit #1974865 - 09/02/04 02:00 PM Have bought the 1984 Bluebird with 6v92 silver. Man is to deliver it Sat.
What I thought was a plus I find by checking may be a bad thing. The coach has had Amisoil multi vescosity syn. Engine oil and not the recomended 40wt. Is this likely to cause problems?
Has been used for several years, proly 50,000 miles or so. Coach has 130,000 miles. THANKS,Marvin FleetMan Member Member # 16015 Reged: 08/28/01 Posts: 1167 Loc: Western WA Re: 8V92 Detroit #1974911 - 09/02/04 02:29 PM In the mid to late '80's, I had a fleet with about 20 8V92's, green and silver. We switched from 40 wt to 15W40 and saw no significant increase in oil consumption or experienced any lubrication related problems. I wouldn't loose any sleep over it.
Randydupree Member Member # 47923 Reged: 09/03/04 Posts: 55 Re: 8V92 Detroit #1976559 - 09/03/04 04:36 PM twincreek,i've had bluebirds for over 15 years,all with 92 series detroits.if you need any help with anything on your bird contact me or even better check out TwinCreek Member Member # 33123 Reged: 07/03/03 Posts: 87 Loc: Kentucky Re: 8V92 Detroit #1976739 - 09/03/04 07:01 PM Thanks Randy. Sure I will need lots of info. About the Bird, seems to have a lot of different systems. Firt thing need to decide is wheather to continue with the Amsoil syn. Multi-grade or go to the recomended low ash 40 weight.
I should have researched more before purchase I guess, that was one reason I bought the coach was because it had syn. Last ten years. Now i find out it needs a special low ash straight weight and the multi grade may shorten the life of the engine? Thanks, marvin juggernaut300 Member Member # 41619 Reged: 04/08/04 Posts: 358 Re: 8V92 Detroit #1976766 - 09/03/04 07:33 PM Damn right! 2 stroke detroit diesels kick ass, I wish I could swap one into a pickup truck, anyone know if its possible and what size would fit?
Dave Haven Member Member # 151 Reged: 10/23/00 Posts: 2802 Loc: Near Flagstaff, AZ Re: 8V92 Detroit #1976904 - 09/03/04 09:25 PM Quote.I wish I could swap one into a pickup truck, anyone know if its possible and what size would fit? It's been done. I've seen a couple of pickup trucks powered by 4-53's. With a turbo, it would probably do quite well. Stroked550 Member Member # 35299 Reged: 10/05/03 Posts: 47 Loc: Litchfield, Ohio Re: 8V92 Detroit #1977053 - 09/03/04 11:00 PM I've seen a '77 F-250 with a 3-71T, a 70's chevy with a 4-53, and 2 70's chevys with 6v-53's. The 6v-53's were a little more work and the trucks both were 4wd with heavier springs, don't know if a stock 2wd front end would handle it.
Randydupree Member Member # 47923 Reged: 09/03/04 Posts: 55 Re: 8V92 Detroit #1977055 - 09/03/04 11:03 PM put a 4bt cummins in your truck,much lighter,or it you just gotta have a detroit use a 353,it fits better. If you got a good deal on the bluebird it will be fine! Kenworth Member Member # 1796 Reged: 01/07/01 Posts: 5372 Loc: British Columbia Southern Corner of the Westcoast Re: 8V92 Detroit #1977698 - 09/04/04 01:42 PM As I said before you should flush the engine good with a higher detergent oil for a short period of time to scavenge up the crap that has built up over the years. Then start running a 2 stroke approved oil myself I don't beleive in synthetic oil why they would use it in a 2 stroke is beyond me.
You never can stop a detroit from dripping so using a expensive oil is a big waste of money. When you do the oil change make sure you do it in a area where you don't mind spilling some oil on. Any engine oil that comes out of a 2 stroke detroit is blacker than black getting any on your clothes never comes out your hands have a nice shade of black for a week.
Jimmy oil works good if you need a coating to put on some wood that is gonna be buried in the ground. Oh ya one risk of changing oil is you may end up with some leaks once the goo inside the engine starts to release itself. It is pretty hard to keep a Detroit from dripping a contractor I worked for has a 8v92 in one of his trucks first week after the rebuid was good no leaks second week the leaks were back dripped just like it used to. One other contractor I work for has a 6v92 in one of his trucks when your working under it you go under the truck as a caucasion come out african american The truck never ever goes to deliver topsoil or gravel to places with nice white clean concrete driveways because the 6v92 drips so bad. KW DaveBen Member Member # 33518 Reged: 07/20/03 Posts: 1718 Loc: Northern California Re: 8V92 Detroit #1977915 - 09/04/04 05:14 PM I had a 8V92 in a dump truck and it never leaked. It was not new, either.
I kept after it a lot. Dave Kenworth Member Member # 1796 Reged: 01/07/01 Posts: 5372 Loc: British Columbia Southern Corner of the Westcoast Re: 8V92 Detroit #1978837 - 09/05/04 01:36 PM I don't know how you can keep a Detroit 53-71-92 from dripping its oil both the 6v92 and 8v92 leak oil 90% of the 2 stroke powered trucks drip oil. KW Gone Fishen Member Member # 1001 Reged: 04/28/99 Posts: 1930 Loc: Lost Wages, Nevada Re: 8V92 Detroit #1979640 - 09/06/04 02:45 AM Excessive idling does it all the time.
If it is a concern and you don't want to see the drips from idling, install the 'air-box drain kit'. Then just check it once in a while. I installed these on the fire trucks at the airport in town here, light work will cause some leakage also. I have also installed them on low use gen sets. About the synthetic mentioned, I have seen it used on some off road drill applications from equipment from Alaska and other cold climates. They seem to be all right with the useage. Still it is up to the owner if further use of a synthetic oil is needed.
Maybe a personal selecton. I just prefer syn.
In the auto transmissions. I have the jury out on the syn. In the engine. TwinCreek Member Member # 33123 Reged: 07/03/03 Posts: 87 Loc: Kentucky Re: 8V92 Detroit #1979942 - 09/06/04 12:51 PM The coach has only 1800 miles on curent oil change. Guess will wait till spring to change, take sample and make up my mind what oil to use. I have always used Mobile One in the engines i wanted syn.
In but I notice the Amisoil has less ash,.5 so may be better in the 2 cycle? And yes has syn. In transmission. Previous oner says he knows DD's are supposed to consume oil, but this one uses hardly none, of corse he only drove it one year and 2000 or so miles between changes. Thanks, marvin Birken Vogt Member Member # 2535 Reged: 08/16/99 Posts: 4431 Loc: Penn Valley, Ca Re: 8V92 Detroit #1980215 - 09/06/04 05:15 PM Less than 1.0% is all they say about ash. I doubt much research has gone into synthetics and multigrades in 2-cycles since for the most part they were on the way out 10 or 15 years ago.so any information is going to be at least part speculation I am afraid.
How much do you expect you will use it? I wonder if you would see any benefit from continuing to use a synthetic, or just switching it back to straight 40 dino. Birken Kenworth Member Member # 1796 Reged: 01/07/01 Posts: 5372 Loc: British Columbia Southern Corner of the Westcoast Re: 8V92 Detroit #1980306 - 09/06/04 07:04 PM Lets put it this way if your going to be driving this bus alot better buy yourself a 45 gallon drum of oil or 5 gallon pails. I can't see it being cost effective to run synthetic oil in a Detroit your really not benefiting anything. I sure would be curious if synthetic oil turns as black as dino oil does in a 2 stroke. Like I said 'Jimmy Black' is terrible it stains everything if you spill some on the ground its stained black permenantly.
I wonder if the engine would runnaway on oil fumes if it ever did happen? KW Gone Fishen Member Member # 1001 Reged: 04/28/99 Posts: 1930 Loc: Lost Wages, Nevada Re: 8V92 Detroit #1980331 - 09/06/04 07:23 PM I will agree about the cost of syn. Oil in an application where not much useage is done. However your cute comment on leakage is old and out dated. The old engines had a steel ring in the 2 piece piston asembly, this is where the problem came from. Back about 20 or so years they switched to a black made rubber product can't remember name to take the place of the steel ring.
This indeed worked wonders for the 2 cycle design. However idling and low work useage will allow the 2 cycle to drip from the air box drains. Also if the old style blower seals are still in useage the oil will pass these seals and again weep out the drains. I agree to take along a 55 gallon drum of oil, however take it along only if oil is scarce and you plan on changing it on the road. If you think the 2 cycle oil is bad and stains, you should come down here and see what the oil is like in the city transit busses on the 4 cycle engines.
There are several fleets running series 60 engines and I swear these engines have never had an oil change. This oil puts the 2 cycle oil to shame. 2 cycle oil any day to that stuff.
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