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Vintage Diesel and Oil Engines Fairbanks Morse, Lister, Petter, Witte and other pump injected Diesel oil engines.

Vintage Diesel and Oil Engines

GM 1-71 Genset Project


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  #21  
Old 12-15-2017, 11:28:58 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: GM 1-71 Genset Project

You are making great progress. What did you use for for the oil filter element? could not find the original one for mine. Check my post for the element i used. AL
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  #22  
Old 12-16-2017, 05:52:03 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

No luck, I copied what you did with the oil filter Diesel
Doctor.
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  #23  
Old 12-16-2017, 05:57:00 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

Good progress today, the engine itself is done. Planning to paint it prior to running. Need to paint radiator shell separately, etc. Lots of details left.
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  #24  
Old 04-08-2018, 05:42:16 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

Completed project. Built a base, added a 4 gallon fuel tank, and a battery box for a group 31 battery. Wired a panel with 3- 120 volt, 20 amp receptacles, voltage regulation via a reostat. Wired 1 outlet per phase so I can load it balanced.
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  #25  
Old 04-08-2018, 05:54:16 PM
slip knot slip knot is offline
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Default Re: GM 1-71 Genset Project

wow, that looks sharp. Great work on that one.
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  #26  
Old 04-08-2018, 06:21:49 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

I ran it yesterday for first time. It starts amazingly fast, I bet I could hand crank it. It governed good and produced generator output.
After about 5 minutes running I noticed I was getting some oil spatter out of the exhaust, not sure it was wetstacking or oil, I ran it back up to 1200, getting worse it started to run away. I fought to get a good seal on the intake to kill it, it just kept running at about 100 rpm or less, finally stopping after a couple minutes. I noticed there was oil sign in the breather in the intake, so did some testing to see if it was the culprit. I ran the breather. The atmosphere with no change. I faced the exhaust toward the ground and could run it at idle with out taking off. Continued to spit oil.
I pulled the blower and I could pour the oil out of it. I made up some plates and pressure tested the air side and really had no leaks at seals but there was some leakage out of the rotor end that mates to the governor weight shaft. There was a piece broke out of the inside where thr roll pin that holds the stub on. I am really skeptical this could cause this much oil via the splash system that lubercates it.
With the blower off, I spun the engine with starter making about 20 psi oil pressure for about a good minute and noticed no oil flow in the airbox.
Not sure that rod is even pressure feed to the small end where if a piston retainer was leaking, I did vacuum them when installed. Other thought is a broken oil ring.
I pulled a blower off another engine that I knew ran good about 40 years ago. Suprisenly it was full of oil in the rotor area, but I am going to bolt it on as is to see if the results are the same.
It would be nice if this engine had an airbox cover opposite the blower like the other Detroits, might help troubleshoot.

https://youtu.be/6_EXqeEJPjs


https://youtu.be/giPMK7ugzj4
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  #27  
Old 04-08-2018, 08:10:30 PM
Sonny Reese Sonny Reese is offline
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Default Re: GM 1-71 Genset Project

That sure is a GREAT looking unit!! WOW!!!!--- I could go for having one of them 1-71's,--- OR any Detroit diesel!--Had an Oliver super 99 gm one time that had the 3-71 in it! --- Real engines!! thanks; sonny
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  #28  
Old 04-08-2018, 10:31:15 PM
K-Tron K-Tron is offline
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Default Re: GM 1-71 Genset Project

Mike, there is an airbox cover just to the right of the blower. With a small brass rod you can check the compression rings through the intake ports. Opening that cover should tell a little more of the story. Perhaps one of the seals on the blower is directional and is pumping oil out of the blower end plates and into the air box, rather than keeping the oil in. I am sure you will have it back up in tip-top shape soon. The amount of work that you have done to that generator in such a short amount of time is unbelievable. Were you ever able to find a schematic for your Delco generator head? I am glad that it generates like it should. It will be one hell of a backup generator when the power goes out.

Chris
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  #29  
Old 04-08-2018, 11:17:05 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: GM 1-71 Genset Project

Great restoration, Got me motivated to finish mine. On the outlet of the oil filter there is a needle valve to regulate the amount of oil that goes to governor and supply lubrication to that end of the blower. The oil from that end of the blower returns through a passage in the housing to the front of the engine gears and back to the pan. On multi cylinder inline 71 engines there is a restricted fitting on that line. Don`t know what the adjustment on that valve should be. Might want to check the return oil passage and the hole in the front end gasket to make sure they are not plugged. As it is a bypass filter you could close the needle, watch the oil pressure and open it till you notice a drop in pressure. AL
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  #30  
Old 04-09-2018, 07:12:27 AM
Wayne 440 Wayne 440 is online now
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Default Re: GM 1-71 Genset Project

Quote:
Originally Posted by The Diesel Doctor View Post
If you get a cross hatch on your liner when you hone it and put a load on the engine when you first run it the hard rings will break in fine. AL
Maybe that engine just needs a good load for a while.
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  #31  
Old 04-09-2018, 12:19:43 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

I been in the airbox cover but no sign of excessive oil when cranking with the blower removed. Rings look good, but it is the oil ring that could be the culprit that you can't see without pulling the cylinder. No issue with seals in wrong and the pressure test proved that they are air tight, I did pull it apart too, see nothing.
As far as needing to be run hard, I thought that right away but at rated rpm and about 50% load the engine took off on its own oil. So not a ring seat issue at this point, this is much bigger.
Diesel Doctor has a good thought on the oil filter oil flooding the blower. I though that at first, but I ran the breather to atmosphere off the governor and was thinking maybe oil would run out of it and go into the blower intake, but nothing came out of it. Maybe I'm wrong and that it could be flooding the blower and not able to raise up vertically up the governor tower? How the flooding oil gets into the blower air side, I'm not sure. I wondered about that valve to the filter, there is no reference to it in the operators book either.
This engine is quite an animal to shutoff when running on oil, with all that mass it is turning it just keeps on going like a old 1 lunger gas engine, even sounds like one. Might have to get a CO2 or Halon fire extinguisher to snuff it out?

No schematic for the Delco, but I did get someone locally to figure out the windings in the DC side of it for controlling the voltage to excite the generator.
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  #32  
Old 04-09-2018, 05:40:04 PM
europachris europachris is offline
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Default Re: GM 1-71 Genset Project

Dumb question - but I'm assuming it has an oil bath air filter? Could it be overfilled or be filled with oil of too low a viscosity? Either could cause the engine to suck oil out of it and make you think it's pulling oil from elsewhere. Just a thought...

Chris
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  #33  
Old 04-09-2018, 08:42:28 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

Chris,
I'm running the air filter dry, not like i will be putting it back to work in the real world any time soon.
I have an update to this issue:

Update:
I did a couple things:
- installed a used blower off another engine. This blower when removed from an engine that hasn't run in 40 years but was full of oil for some reason too.
- ran with the air filter off.
- ran with the bypass filter shut off.

Ran the engine tonight for 30 minutes with no smoke or oil out the exhaust. Half of this time I ran it with about a 50% load. Ran perfect.

So my next move is to plumb in an air cleaner restriction gauge and see if I am restricting the intake or not.
Then I will turn on the oil filter again. I noticed tonight when briefly turning it on I would loose about 6 psi oil pressure, I can restrict the outlet of the filter by cranking in that valve to restrict it to maybe a couple psi loss only?

Baby steps...
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  #34  
Old 04-25-2018, 08:46:46 PM
Mbetti Mbetti is offline
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Default Re: GM 1-71 Genset Project

Engine is running good now, seem to have all the bugs worked out.

https://www.youtube.com/watch?v=FwFtxZDBeyE

https://www.youtube.com/watch?v=j6M7wu3VaYM
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  #35  
Old 04-25-2018, 10:40:05 PM
slip knot slip knot is offline
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Default Re: GM 1-71 Genset Project

That sure sounds sweet.
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  #36  
Old 05-27-2019, 07:50:00 PM
dauntless dauntless is offline
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Default Re: GM 1-71 Genset Project

Sorry for being late to the party on this one.

Engines sold through Cleveland Diesel carried an "A-XXX" serial number on the tag, as well as the Detroit issued serial number.

1-71RA #A-225/171307 was sold to Drott Tractor Co., 3/8/1940, Gen/Radiator, Order #B888 1200RPM.
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