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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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  #1  
Old 05-14-2016, 01:56:44 AM
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Default 1-71 Detroit Diesel (GM)

I am restoring a 1-71 power unit. When i dissembled the fan hub assembly i noticed it had a piece cast into the hub shaft to circulate oil for lubrication when the pulley is turning. There is a filling port on the pulley. Does anyone know lubricant, and quantity required? Does anyone have a service manual? I have a parts book. Al
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  #2  
Old 05-14-2016, 02:04:12 PM
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Default 1-71 Detroit Diesel

Looking for info. Name plate and stamped on my engine block is s/n 171-553 model 171G. On the flywheel housing name plate model 1-71RA and s/n A 514 Most of the 1-71 engine`s and pictures i have seen the s/n has been in the 500 rds. Have contacted current owners of Detroit Diesel to see if they have archives and info on production runs and number of engines produced. This engine has the original clevite bi metal main and rod bearings and show little wear. The cylinder liner predates the figure eight ports. They are drilled holes. When the engine was last run and shut down decades ago the exhaust valves were closed and the piston was covering the liner ports. The cast iron rings look new. This engine came from Pearl Harbor Naval Base. I cant wait to hear it run again. Aloha Al Shannon
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Old 05-14-2016, 02:23:49 PM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel

Would love to have a 171, though of the generator set variety. Looking forward to seeing yours running

I believe these are "GM Diesel" engines, not being called Detroit Diesel until 1964? IIRC.

I have also heard that while all 71 series engines use interchangeable common parts, this is only the case for 271 and up, and not the 171. Don't know how much truth there is to that though.
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Old 05-14-2016, 02:59:54 PM
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Default Re: 1-71 detroit diesel

You are correct about the proper name. Went to Coast Guard engine school Groton Conn. in 1960.Trained on a 6-71s. Gray Marine, GM and Detroit Diesel. Have worked on 51`s,53`s 71`s 110`s and 149`s. This is my first 1-71
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Old 05-14-2016, 08:06:46 PM
Ed Bezanson Ed Bezanson is offline
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Default Re: 1-71 detroit diesel

Doc Have always loved the little one cylinder 71 series. I taught Auto Mechanics at Fitch Senior High in Groton, CT for 35 years. One of my students fathers had been in the Navy at Submarine Base in the 70s and he had collected about 10 GM engines and allowed our Auto Shop to rebuild a 2-71 for him. Great fun. I presently have a 3-53 out back in a shed I hope to use someday in some type of repower job.
The Coast Guard Academy is in New London across from Groton. Was the school at the Academy or across the river at Sub Base??? 1960 was the year I graduated from Waterford High School and soon after ended up in the Navy Seabees in Calif. working on Diesels in all kinds of construction Equip. Hope to see the 1-71 running again soon. Ed B
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Old 05-14-2016, 08:51:09 PM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel

The 51 series mentioned- I believe they only made them for a few years. Those are *really* neat, being a valveless, loop-scavenged two stroke diesel. A 451 would be high on my want list
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Old 05-14-2016, 09:15:48 PM
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Default Re: 1-71 detroit diesel

Ed the Coast Guard training schools for the enlisted personal were at Avery Point Groton Connecticut. The training was the different ratings. engineman,electronics,botswain mate etc. Aloha AL
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Old 05-14-2016, 03:56:56 PM
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Default 1-71 detroit diesel (GM)

A diamond in the rough

Sorry for the crooked pics Al
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Last edited by BTPost; 05-15-2016 at 12:54:54 PM. Reason: Please keep to a SINGLE thread per Unit... thanks....
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Old 05-14-2016, 04:23:32 PM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel (GM)

Wow, that poor thing. But at least it looks good under the rocker cover!
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Old 05-17-2016, 03:39:32 AM
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Default 1-71 detroit diesel (GM)

Evans vane fuel pump was used on early 1-71 engines. The pump shaft seals appear to be the same as the current gear pump. There are thin gaskets between the flange,body and cover. .002 thick.Click image for larger version

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Last edited by BTPost; 05-17-2016 at 12:38:54 PM. Reason: PLEASE keep to a single Thread on any ONE Unit... OK?
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Old 05-31-2016, 02:33:03 PM
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Default Re: 1-71 detroit diesel (GM)

1-71 rebuild Crankshaft assembly p/n 5152746 The journals polished up well. All are std. The old leather seals cut slight grooves on the crank seal surfaces. I may use Sleeves and oversize seals.Might just reposition seal depth. Crankshaft oil seals p/n 5150846. Front and rear seals are the same. These seals are the same size seals used on current day 71 series engines.Click image for larger version

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Old 05-31-2016, 03:01:37 PM
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Default Re: 1-71 detroit diesel (GM)

1-71 rebuild Fan hub assembly p/n5159031. Fan hub assembly has a oil fill port. When the hub pulley turns it circulates oil. The appendage attached to the hub shaft pushes lubricant to the bushing in the pulley. Fan blade p/n 3290426. suction type.Click image for larger version

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Old 05-31-2016, 10:50:10 PM
gootsch gootsch is offline
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Default Re: 1-71 detroit diesel (GM)

In the past I have used speedie sleaves with standard sized rubber seals without problems.
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Old 05-31-2016, 11:57:21 PM
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Default Re: 1-71 detroit diesel (GM)

The genuine detroit sleeve will fit on the shaft. Detroit now uses directional seals so i need to use a right and left hand one. Thanks Gootsch.
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Old 06-04-2016, 01:07:36 PM
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Default Re: 1-71 detroit diesel (GM)

1-71 rebuild. Pushrods, roller cam followers and compression release.The cam follower rollers have needle bearings instead bushings as are currently used.Click image for larger version

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Old 06-04-2016, 11:18:40 PM
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Default Re: 1-71 detroit diesel (GM)

1-71 rebuild.Click image for larger version

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ID:	255498 Dipstick p/n 5152866 Note the oil level operating range. We have come a long way. My BMW does not have a dipstick. Hand crank handle and support assembly. It will be cool to hand start a series 71 engine.
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Old 06-09-2016, 11:09:07 PM
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Default Re: 1-71 detroit diesel (GM)

Hi Vanman, Thanks for posting about the 51... I've been around Detroits for over 30 years... I had no idea they existed...

https://en.wikipedia.org/wiki/Detroit_Diesel_Series_51

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Old 06-10-2016, 12:17:27 AM
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Default Re: 1-71 detroit diesel (GM)

One of my customers out here had a pair of 4-51 marine engines in his fishing boat. Having no valves tune ups were easy. They had unit injectors but required a special injector height timing pin. The boat sunk but the engines were salvaged. Have to check, not sure what happened to them. Aloha Al
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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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Old 09-01-2017, 02:54:29 AM
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Default Re: 1-71 Detroit Diesel (GM)

Mbetti, The 171 engine tag you posted in your album shows a model number of 1005 and a serial number of 1-104. It has detroit diesel engine on the bottom. Mine has Cleveland diesel engine division. I wonder if Detroit Diesel put together a few of these from the old parts inventory at a later date.Click image for larger version

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