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Detroit 2-Cycles in 2017+
- Thread starter Birken Vogt
- Start date
alskdjfhg
Senior Member
So far so good, yesterday was getting a little worrisome though. The gully 30' from the back door, that normally flows about 4" deep was rip roaring along loud enough to be hear flowing from inside the house, must have been atleast 16' deep. About 2' more and it would have over-topped the bridge and started to come in the back yard.
The news is saying that we've gotten over 24" in the last 36 hours,with possibly another 24" to come. The city has had to open some of the reservoirs to preventing the water form over-topping and compromising dams and levees, but at the cost of flooding some neighborhoods.
Thankfully not much wind so no major power outages or downed trees.
If I had one of the heavier farm trucks in town with me, I'd be out helping folks that got flooded. But right now all I've got is the little 3/4 ton dodge and I don't trust it as a recovery vehicle. I've seen it get stuck in dewy grass....
This was the view yesterday of the front and back yard. The city decided we needed curbs and gutters last year, but screwed up the drainage so now they flood.
School's been cancelled until Tuesday next week. I'm hoping the rain stops here soon so I can get down to the farm and see what happened down there.
To be honest, the worst thing has been that the internet keeps cutting out every few minutes. Other than that, been killing time doing homework, reading here and looking at machinery I cant afford. Very lucky compared to a lot of folks.
Fingers crossed it stays boring.....
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Junkyard
Senior Member
Be safe man.
Birken Vogt
Charter Member
I heard one top notch guy claim he could set one up to not leak at all by paying correct care to gaskets and seals. I have seen them not leaking any worse than anything else. Except those air box drains. Even though the oil is not getting on the motor it still winds up on the ground where the truck is parked. So that still counts as a "leak" I guess.
I saw the usual ignorant Youtube comments, to me it looks like he is keeping it against the governor not because "Detroits run better that way" (I don't subscribe to that theory exactly) but because he wanted to be real sure he was in a low enough gear he could make it to the top without having to downshift which would be impossible.
Had that happen to us once on a 31% grade, engine flamed out. Could not get it moving again even in granny low, had to back to the bottom and start over. Good thing the boss was driving, I was just guffawing from the passenger seat.
alskdjfhg
Senior Member
RZucker
Senior Member
Yes... Absolutely you can assemble a 2 stroke Detroit to not leak. I have done a bunch. Air box drains can be routed to a "catch can", had one on my old GMC 9500 with the 8V71.
And to the stupid people on you tube... they should try to get that load up that hill. I bet none of them have driven a truck larger than a 3/4 ton Dodge.
Junkyard
Senior Member
I have thought about a YouTube channel many times. I don't simply because of the keyboard commandos! Well that and I prefer to keep a low profile 
Yep , got one of them " catch can's " on the number 3 Grove .
http://www.heavytruckforums.com/showthread.php?363-Ccc&p=2831&viewfull=1#post2831
Truck Shop
Senior Member
The wrong oil and idling is what causes a Salt Water Chevy to slobber. You do your equipment check, make your log book, fire it up build air and get rolling.
Catch each down shift at 1750 to 1800 bring it back in at 2100 to 2200 and keep it there. Red October, one ping one ping only.
Truck Shop
Catch each down shift at 1750 to 1800 bring it back in at 2100 to 2200 and keep it there. Red October, one ping one ping only.
Truck Shop
RZucker
Senior Member
RZucker
Senior Member
One thing about the old 2 strokers was the cast iron pistons, you could throw a full load on them right after startup with no worries about sticking a piston.
crane operator
Senior Member
That isn't the first time they've come out of a quarry hole with something heavy, they at least had the loader behind him in case the driveline or axle went. Most of those quarry crushers set around and don't have the best trailer brakes- most of the time they're backed all the way off. If you lose a driveline, you're headed all the way back down.
willie59
Administrator
Dude on the loader tooted his horn to let the driver know he was turning him loose...I doubt that driver even heard that horn. For sure that truck had a load on it, you can see the tandem axle tires squatting under the load.
old-iron-habit
Senior Member
- Joined
- Nov 22, 2012
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- 4,233
- Location
- Moose Lake, MN
- Occupation
- Retired Cons't. Supt./Hospitals
None of my 3 and 4 cylinder Detroit's leak. I pressure wash them once a year to keep the twigs and crap cleaned up. Oil is not a issue at all. I think gaskets and sealers are a lot better that when the engines first came out.
P.S. Harleys don't leak anymore either.
DMiller
Senior Member
I never minded overhauling the two stroke engines, just were a little too fussy as to fitting sleeves. I wore two Sunnen hones out fitting liners in the 71's. Many except us old farts would forget to replace the 'pencils' at the water pump and generally another somewhere hidden in plain sight point where the blocks would get thinned out from erosion and corrosion, conversion to water filters helped much of that. The 92's I worked on were usually the complaints, not enough power meaning they did not turn tight enough even as they would pull hard, not enough noise as the turbos on those and the old 350 71's would quiet them down. A lot of people failed to check wrist pin seals adequately where a few I saw ran flat away eating engine oil, I argued often when what thought they were techs failed to torque the head studs prior to setting the heads. The old Maxidyne and Thermodyne Bulldogs were some tight long lived monsters as well, saw many make 500,000+ on original parts, just knocked to beat hell from piston slap.
Oh and when Harley went to belt drives or the earlier sealed o-ring link chains they no longer needed the 'programmed' leak to lube those chains. Better gaskets, seals and sealants did help in those older engines too. Loved Panheads, shovels and knuckles not so much.
Oh and when Harley went to belt drives or the earlier sealed o-ring link chains they no longer needed the 'programmed' leak to lube those chains. Better gaskets, seals and sealants did help in those older engines too. Loved Panheads, shovels and knuckles not so much.
alskdjfhg
Senior Member
For sure, as well as filters, oils and manufacturing methods.
Lots of folks look down at old equipment and old engines, but I've wondering for a long time what would happen if you took an older design, a two stroke Detroit for example, but used modern materials, manufacturing methods, seals, filters and oils.
The design of a 2 stoke Detroit came out in the 30's right? A lot has changed since then. It used to be holding .0001 tolerances was reserved for guys in clean lab coats with P&W jig bores, but today "tenths" (.0001's of an inch) can be held in a production environment no problem.
A perfect piece of equipment in my mind would be to take the simplicity of old iron, but take advantage of the improvements that have been made, minus as much electronic complexity as possible.
Improved manufacturing methods and electronic controls are probably the two biggest reasons there is such a difference between old and new. Besides the old being worn out and beat up.
Detroit 71 liners were fitted to 0.0002" and OEM coded by tenths by location of the part number stamp (stenciled on) on the liner. Correct measuring procedure was/is using calibrated dial bore gauge!
Typical to find enlarged cylinder bores located toward the top block deck area caused by 'mechanics' that non-fixed hones during overhauls.
Always measured new liners for size, out roundness and sent the rejected liners by to parts purchase source.
Wrestling VanNorman 777 boring bar on V-engines wasn't fun!
Typical to find enlarged cylinder bores located toward the top block deck area caused by 'mechanics' that non-fixed hones during overhauls.
Always measured new liners for size, out roundness and sent the rejected liners by to parts purchase source.
Wrestling VanNorman 777 boring bar on V-engines wasn't fun!
DMiller
Senior Member
Still remember going thru literally stacks of liners at what was Western Diesel the Detroit dealer in St. Louis to find something usable. Many out of round, High stamped std. low stamped std. all the way thru to .030 over size and all sorts of variables between PITA we could not charge time to. Most of the time their old stock was great, the newer stuff was coming from ?? and was crap. As noted we used a set of Sunnen brand square hones to one clean up rough liner bores then to fit up-sized sleeves. Saw many come in with ruined blocks as the guys that 'recently overhauled' just dropped in what would drop in and ripped them apart at the intake ports. 92's were an odd breed with the Liner O-rings in the block not on the sleeves unlike Cummins and others. Bulldog reminded me of the old Ferguson and Ford tractors, drag the shined up sleeves out, lightly scotchbrite the bores then set the new Dry sleeves in the Dry Ice freezer, run like hell with a few to the block and get them set before they swelled back to size and tighten a retainer to hold them down.
Do not know what is like these days as have not been in one for 25 years.
Do not know what is like these days as have not been in one for 25 years.
92U 3406
Senior Member
I have thought about a YouTube channel many times. I don't simply because of the keyboard commandos! Well that and I prefer to keep a low profile
I used to post videos on YouTube but I eventually deleted them all because I got tired of all the dumb comments made by idiots living in their momma's basement.