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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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  #141  
Old 06-24-2017, 12:20:30 AM
Vanman Vanman is offline
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Default Re: 1-71 Detroit Diesel (GM)

Nice! I can't stand when people put a modern generator *alternator* on their old cars and whatnot. Completely unnecessary. They worked back then, and the principles of electromagnetic theory have not changed lol.

Is this one 6 or 12 volt?

Making any headway on the water pump?

Keith
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  #142  
Old 06-24-2017, 01:30:37 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

The generator is 12 volt 10 AMPS. The ammeter gauge in the instrument panel that was supplied with the engine was 15-0-15. Was able to find a 20-0-20. Will do for now. Ordered a 2-71 water pump seal and impeller assembly P/N 5170626. Very similar to the 1-71. When it gets here i may have to get creative. AL
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  #143  
Old 06-25-2017, 08:05:33 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Replaced the oil bypass filter element with a sock type which were used in earlier engines. Found this one at NAPA 551011. Saving the old parts in case i find the original.Click image for larger version

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  #144  
Old 06-28-2017, 01:47:51 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Trying to identify the original gauges on a 1-71. They were all made by AC The part numbers are oil pressure 1506021, water temp 1510922, tachometer 1535873 and ammeter 857891. The generator output being 10 amps it would make sense for the ammeter to read 15-10-5-0-5-10-15. Cannot find any pictures of these gauges on the engines posted on line. Any 1-71 owners out there have any info? AL
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  #145  
Old 06-29-2017, 09:53:05 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

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ID:	285505Extra time on my hands. While waiting for the radiator, water pump parts and starter, I powder coated the air cleaner and the hand crank handle.
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  #146  
Old 06-30-2017, 10:03:53 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

One step back two steps forward. Was hand cranking the engine to get a pre lube and i could hear a exhaust valve leaking. Removed the cylinder head and found everything exceptional clean. Removed the valves and noticed the seats in the head had a buildup of hardened material. Dirt, carbon and possibly cosmoline. This was preventing the valves from seating. Cleaned valves and seats with a wire wheel and there is no indication of pitting, burning or wear. The seats are cut 45 degrees full contact. I guess there was no 3 angle cutting in those days. ALClick image for larger version

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  #147  
Old 06-30-2017, 10:15:38 PM
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Default Re: 1-71 Detroit Diesel (GM)

Some more pics of under the cylinder head. I will make a template of the head gasket and mike the thickness. It looks great and i am going to reuse it.Click image for larger version

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  #148  
Old 07-03-2017, 01:08:09 AM
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Default Re: 1-71 Detroit Diesel (GM)

Does anyone have information on the 1-71 power take off? Is it a Rockford or a Twin Disc? It has a SAE 1 housing. I don`t have the top inspection plate which would have the information on it. Also i am missing the operating handle which i don`t know what the length should be. AL
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  #149  
Old 07-03-2017, 10:02:38 PM
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Default Re: 1-71 Detroit Diesel (GM)

Reconditioning the cylinder head. Cleaned up well. Replaced the injector hole tube.The old copper tube has the same dimensions as the current day tubes but was twice as thick and heavy. Click image for larger version

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  #150  
Old 07-03-2017, 10:37:59 PM
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Default Re: 1-71 Detroit Diesel (GM)

Al, The factory over center clutch for the 1-71 was built by Rockford. I have seen three original 1-71P engines setup with the SAE #1 Rockford PTA181 over center clutch, and many more with the later Twin Disc and General Motors branded Twin Disc over center clutches. My 1-71G has a Rockford SAE #1 over center clutch on it, however the tag is missing just like yours. The original data plate was etched brass. I believe we need to make several new plates up. I have some good pictures of what we need to reproduce. I am away from my engine and literature right now; I believe the clutch handle is about 28 or 29 inches long. Once I know for sure I will email you. Great work on reconditioning your cylinder head! I wish I had the tools to machine the injector tubes like you do. How did you get that original BB liner out of your engine? Round brass stock through the port holes? I have heard many stories of those original liners stuck so bad that the only way to remove them was with a hacksaw and a cold chisel. I commend you for taking every initiative to make your engine as complete and original as possible! It will be a glorious engine when it is all complete.

Chris
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  #151  
Old 07-03-2017, 11:09:53 PM
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Default Re: 1-71 Detroit Diesel (GM)

Chris, I was baring the engine over with the head off and the liner moved. I brought the piston to TDC and the liner came all the way up. You should be able to push a dry liner on a 71 into the bore by hand when it is new. You are right about tight ones. I have seen more than my share of those. This reinforces my feeling that this was a low hour engine. Send me the pics of the Rockford plates. Thanks AL
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  #152  
Old 07-13-2017, 12:46:41 AM
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Default Re: 1-71 Detroit Diesel (GM)

Got my fresh water pump shaft back from the machine shop. They spray welded it and machined it to the original diameter. The impeller to shaft seal won`t leak now. Received my 2-71 impeller and seal assy p/n 5170626 and the shaft diam. is the same size as the 1-71. The old pump did not have a stainless insert where the impeller seal rides. I am going to machine the old boss in it to accept the SS insert. p/n 5178319 ALClick image for larger version

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  #153  
Old 07-14-2017, 10:08:24 PM
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Default Re: 1-71 Detroit Diesel (GM)

I need to take off a small amount of material from the diameter of the 2-71 impeller to match the old one. Getting started to manufacture a exhaust manifold as the engine didn`t have one. Have some good pictures of the original. I can match it pretty close.Click image for larger version

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  #154  
Old 07-17-2017, 10:39:13 PM
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Default Re: 1-71 Detroit Diesel (GM)

Powering out on the exhaust manifold. Water jet cutting machines are amazing. All i need is the measurement from flange to flange. Does anybody have an original manifold to get that dimension? Thanks ALClick image for larger version

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  #155  
Old 07-18-2017, 09:44:19 PM
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Default Re: 1-71 Detroit Diesel (GM)

Ready to install my reconditioned cylinder head. New injector tube, reground and lapped valves. Reusing the head gasket. I made the gasket around the perimeter of the block to keep the oil in out of 1/16 inch oil resistant material. The liner height is .005 above the fire deck The metal head gasket should seal good when i torque the head. ALClick image for larger version

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  #156  
Old 07-30-2017, 03:32:46 PM
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How about vintage diesel mechanics hands? Mschreibers hand in his Cummins HB thread is a mirror image of mine. When i got married my wife to be made me get a pedicure for the wedding pictures. Show me your hands.Click image for larger version

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  #157  
Old 07-30-2017, 03:37:03 PM
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Default Re: 1-71 Detroit Diesel (GM)

LOL! Nice!!

Love those engines that are big enough to climb inside of them to work on them.
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  #158  
Old 07-30-2017, 10:37:10 PM
AngrySailor AngrySailor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Quote:
Originally Posted by Vanman View Post
LOL! Nice!!

Love those engines that are big enough to climb inside of them to work on them.
Or when you need to climb a ladder to inspect your spare piston/liner and each crank throw has its own walk through door
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Old 07-31-2017, 07:50:09 AM
Sooty Jim Sooty Jim is offline
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Default Re: 1-71 Detroit Diesel (GM)

Awesome to see that stuff again. What engine? What ship?
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  #160  
Old 07-31-2017, 11:26:45 AM
AngrySailor AngrySailor is offline
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Default Re: 1-71 Detroit Diesel (GM)

Quote:
Originally Posted by Sooty Jim View Post
Awesome to see that stuff again. What engine? What ship?
Sulzer 6RD76 powering M/V Algosteel

I cant wait to see that 1-71 running
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