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

Vintage Diesel and Oil Stationary  Engines

1-71 Detroit Diesel (GM)


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  #41  
Old 06-16-2016, 08:51:28 PM
Vanman Vanman is online now
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Default Re: 1-71 Detroit Diesel (GM)

I'm curious how the balance weights move in relation to the crank, which I assume also has its own counter weights.

That must be a very smooth running single cylinder engine!
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  #42  
Old 06-16-2016, 09:52:46 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Being Two cycle every revolution is a power stroke. When the piston hits TDC that force has to be counteracted by another force in the other direction. They had to use these weights. If the weights were only on one shaft the engine would want to rock side to side. By splitting the amount of weight required to counteract these forces the engine runs with very little vibration at all speeds.The multi cylinder 71`s do not have the right piston at BDC to act with the forces the one at TDC. That is the reason they all have counter weights. Four cycle engines do not have this problem. Al
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  #43  
Old 06-17-2016, 12:19:24 AM
K-Tron K-Tron is offline
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Default Re: 1-71 Detroit Diesel (GM)

Al, I wish I had a factory serial number chart for these engines. Ive heard that they were built between 1937 and 1938, 1938 and 1939, and 1938 through 1940. Most people believe they were built between 38 and 39. I have a friend in Alaska who swears his 171926 was built in 1940. Your 171533 is extremely close serial number wise to the 171537 that was for sale two years ago in Brazil. Actually those are the two closest serial numbers I now know of. I have a parts list/price list and operators manual for a 1-71. I am told they never made a service manual for one. My parts/price book is dated 1942 and the operators manual 1939. The most expensive part was the instrument panel at $116.00, then the block at $111.00, the blower was $110.00, the governor was $105.00 or $95.00 depending on model, the crankshaft was $100.00, the starter motor $85.00 and the flywheel $82.50. Guess what the radiator cost new??? $40.00 Imagine that! I'd gladly pay those prices today if only they could be found!!! They are a smooth running engine, but they shake the ground quite well at speed. I cant say ive ever heard one run under any sizeable load. All of them seem to be retired at this point. Thank you so much for all of the pictures. It is a remarkable engine that many truly enjoy.

Chris
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  #44  
Old 06-17-2016, 07:28:30 AM
Oil Power Oil Power is offline
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Default Re: 1-71 Detroit Diesel (GM)

This nicely restored engine was displayed at a Lake Goldsmith rally in 2008. Will post the engine number later if I can obtain it.
Hugh
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  #45  
Old 06-17-2016, 09:35:00 AM
gootsch gootsch is offline
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Default Re: 1-71 Detroit Diesel (GM)

I had at one time a Gray Marine Diesel catalog dated 1940. It showed a line of GM 71 Diesels that included 1-71, 2-71 3-71, 4-71, 6-71 and a double 6-71. The double 6-71 had two engines, side by side, one turning left, one turning right, geared to the same gear box.
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  #46  
Old 06-17-2016, 12:03:31 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Hugh Thanks for the pic. Its the only other one i have seen with the original hand crank and the support for it at the bottom of the radiator.
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  #47  
Old 06-17-2016, 03:07:06 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

In my Gray Marine 64HN9 manual is a good pic of the 64 hole cylinder liner that is in my 1-71.Click image for larger version

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  #48  
Old 06-17-2016, 07:28:37 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Gootsch, Detroit also made a quad unit for the LCM8 landing craft. Original propulsion was 4 twin packs 671's. Paired to two hydrostatic transmissions. The flywheel housing of the 4 engines face each other with the transmission in the middle and the output flange of the transmission was underneath the entire unit. We are talking eight 671's on two propeller shafts. My friend and customer owns a LCM8 and delivers supplies to the Island of Niihau in Hawaii. Several years ago I got the job of rebuilding both units. That is 48 cylinder liner kits. I had a lot of helpers, but it still took two months. Two of the engines had electrical starters and two had hydraulic ones on each quad unit. You can hand pump up the accumulator to supply oil pressure to start an engine. Once started you could start the rest of the engine through the transmission. Aloha Al
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  #49  
Old 06-23-2016, 01:11:54 AM
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Default Re: 1-71 Detroit Diesel (GM)

1-71 rebuild. Spring # 8 in my evans vane fuel supply pump was broken. Found one with the same coil diameter in a ball point pen. Cut it to the proper length. Needed gaskets #3. They had to be .002 to .003 in thick. Cut a pair out of parchment paper. You have to find parts wherever you can with these old engines. ALClick image for larger version

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  #50  
Old 06-30-2016, 08:34:59 AM
willem willem is offline
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Default Re: 1-71 Detroit Diesel (GM)

Hello,
hope this is the right place to make some demands on the electric
cicuits of my jenbach diesel.
i only can start him to shortcut everything
the startmotor turns , the solenoid clicks
but using the right buttons seems not possible .
what do i wrong ? or is there some relais faulty?
thanks for every reply Willem .
the fotos are in the tread american jenbach diesel compressor.
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  #51  
Old 07-02-2016, 05:52:04 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

1-71 rebuild Cast iron instrument panel. Before and after. My welder got the material from a iron skillet. ALClick image for larger version

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  #52  
Old 08-13-2016, 10:59:47 PM
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Default Re: 1-71 Detroit Diesel (GM)

Had to put the 1-71 rebuild on hold. Got a couple engine overhauls. They pay the bills. Will be getting back on the project soon. Sharing pics of my 53-71-92 series injector timing tools. The large one is for a GM 6-110. ALClick image for larger version

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  #53  
Old 08-14-2016, 12:41:06 AM
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Default Re: 1-71 Detroit Diesel (GM)

Wow, neat tools. I'm guessing based on the difference in tools that injectors from the other series are not interchangeable into the 110 series?
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  #54  
Old 08-14-2016, 01:23:47 AM
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Default Re: 1-71 Detroit Diesel (GM)

Looking at a 6-110 engine from 30 yards away it looks like a 6-71. But up close it is much larger. The 6-110`s unit injector looks the same except just bigger.
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Old 08-14-2016, 08:15:33 AM
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Default Re: 1-71 Detroit Diesel (GM)

I've got a 6-110 twin pack genset, 364 original hours.
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  #56  
Old 08-14-2016, 12:11:32 PM
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Default Re: 1-71 Detroit Diesel (GM)

Beautiful, What KW? I have seen them with roots and centrifugal blowers. AL
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Old 08-15-2016, 01:19:15 PM
Nobby Nobby is offline
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Default Re: 1-71 Detroit Diesel (GM)

6-110 Naked and Dressed.

Cheers
Nobby
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Old 08-15-2016, 08:44:11 PM
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Default Re: 1-71 Detroit Diesel (GM)

This is a 300kW unit. Runs so smooth, incredible to listen to.
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  #59  
Old 08-28-2016, 11:05:31 PM
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Default Re: 1-71 Detroit Diesel (GM)

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ID:	261523Just finished changing a cylinder head on a detroit 12V-92T marine engine. Now i hope to get back to my 1-71. AL
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  #60  
Old 09-04-2016, 10:31:46 PM
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Default Re: 1-71 Detroit Diesel (GM)

1-71 rebuild, blower assembly P/N 5151526 End plates and blower housing are cast steel. Blower rotors are aluminum. The rotors are the same diameter as the multi cylinder blowers, but are only 2.612" long. the oil seals and bearings are the same size as the current ones. You can tell that this engine was in the military. The blower had lots of cosomoline in it and castings were primed in zinc chromate and painted navy gray. " Anchors-A-Weigh" ALClick image for larger version

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