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Thread Title:

671 Info needed


Created On Tuesday August 22, 2006 11:10 Diesel Talk
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mrnu
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Note Tuesday August 22, 2006 11:10 View users profile View thread in raw text format
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|Hey there , This is great ! |I have just got into repairing an old Grayhound bus , I would like to Know how to ID this engine ?, and also how to start it up ,after it has set for 5 yrs? Will plan on oil change , What wt ? How Much ? Going to drain off the old fuel , change filters &blow out lines , how will be best to prime it ? Any avise would sure be Appreciated !! Thanks , George

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I am retired and am new to diesels and need info and more info ,advice on the older 671 detroit
THANKS , george
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crossthreaded
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Note Sunday August 27, 2006 01:14 View thread in raw text format
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there should be an engine serial number somewhere on the block. what type of detroit is it? what year bus?


15w 40 oil, rotellat, delvac, delo, your personal preference on that. and until it is at the F mark on dipstick, anywhere from 10qts to 10 gals, depending on engine size.

if you prime the fuel filters and make sure the tanks are full to pickups, a few cranks and reprime of the filters and some starting fluid used sparingly should do the trick. also swap out the old air filter while your at it. will also need a good battery charge, if not a new set of batteries. (most of the time 12/24v split systems on buses)
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mrnu
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Note Sunday August 27, 2006 13:24 View users profile View thread in raw text format
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Hi Thanks so much for your Info. !..The 671 was suppose to be out of a front end loader , don't know what yr , the bus is a 1951 GM , ex Grayhound ... The rig is 3 long hrs away from my new home , so it is hard to check out every thing ....Was just told today that the 2 strokes would freeze up in the rack? and to make sure they are free before cranking engine, I did have to get a New set Of batteries and new cables...(WELDING Wire)3/0 ought to gitter done ! hope to get up there in 2 weeks to try all this stuff out, and get it cranking , thanks again , and any thing more you can add, George

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I am retired and am new to diesels and need info and more info ,advice on the older 671 detroit
THANKS , george
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crossthreaded
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Note Monday August 28, 2006 00:14 View thread in raw text format
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you might want to take a big crescent wrench up there with you to put on one of the drive pulleys and turn engine over by hand a couple revolutions. If it was me I would get enough to change the oil twice, once before starting and once after a couple hours run time.
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mrnu
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Note Monday August 28, 2006 08:10 View users profile View thread in raw text format
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Crossthred, Thanks , I do Have a "BIG" cresent to take up ! Good Idea on the oil , Thanks again , George

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I am retired and am new to diesels and need info and more info ,advice on the older 671 detroit
THANKS , george
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desotorick1
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Note Thursday September 07, 2006 17:18 View thread in raw text format
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Hi, When I acquired my 453T Detroit, I was told by many to only run 40 WT. oil in a 2 stroke Detroit. Not multiple viscosity oil such as Delo 400 15-40. They said it will lead it to an early grave without straight 40 diesel engine oil.
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mrnu
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Note Thursday September 07, 2006 21:38 View users profile View thread in raw text format
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Hey, Thanks for this Info on the Oil ( 40 WT) , Makes sense to me as i have always ran single grade in the OLD Gas engines... Tell me about this 453, How does it defer from the 471 ?? Bore ?? Or is it a completly diff. Block etc ? Still working on mine to get it ready to try , Found a broken Bracket and missing bolts that hold the Rad, and cooling tank up ! The Fuel tank only had a 1/8 " pipe drain in bottom ! so it Took me a long time to get rid of the 60 plus Gals. of fuel !! Thanks , george

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I am retired and am new to diesels and need info and more info ,advice on the older 671 detroit
THANKS , george
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desotorick1
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Note Tuesday September 12, 2006 16:49 View thread in raw text format
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Hey George, I'm not real sure of all that is different between the the 453 and the 471 Detroits. I was told that the the 471 is water cooled farther down in the block. I've never looked in my Chilton's to see where th increase in cubes comes from. I assume you already know that the first number indicates # of cylinders and the last two #'s indicate cubic inches per cylinder--- 453=212", 671=426". My turboed 453 puts out 170HP&400lb.ft. of torque. Moves our 16,000 lb. motorhome pretty good and gets 10mpg. Can't beat the noise either!
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mrnu
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Note Wednesday September 13, 2006 21:05 View users profile View thread in raw text format
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Hi Desotorick, Hey do you have desotos ?? Years? I have always worked on the Flathead mopar engines & still have some around.. anyway I don't have any manuals for this 671 .. My Chiltons starts at 60 to 68 ! I can't find any numbers on the engine boss to ID it , going to sell the property that I have it stored on ,so got to get her going , and If it will go then got to go DOWN a MT Grade 6 % for over 6 miles ! 3,000 ft !! Ha ! I hope that the Brakes will do it !! along with the Compression ! ??? Thanks for your Input , George

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I am retired and am new to diesels and need info and more info ,advice on the older 671 detroit
THANKS , george
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desotorick1
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Note Tuesday September 19, 2006 16:01 View thread in raw text format
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Hey George, Yes I do have Desotos. I have 4 '58 Firesweeps that I'm building one 2 door hardtop out of. Between the the four cars I think I have enough parts to build one. Good luck with your bus and be safe!! Rick
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MarineTech
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Note Saturday November 04, 2006 20:29 View thread in raw text format
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In the 2 cycle detroit, make sure you use straight 40 wt oil. The Mobil that is sold at detroit dealers and distributors is by far the best you can get. I would pop the valve cover off, move the rack, make sure there is no bind.(the rack is a long metal tube that is connected to the fuel rod in the injectors). If it is stuck or binding, i would have someone who knows these engines fix and adjust it. If you want any further info on this engine, send me the serial numbers and model numbers, i can look the engine up and give you all the details on it.

Also, the 6-71 is a 6 cylinder inline engine, the 71 means 71 cubic inches per cylinder. The 4-53 is a 4 cyliner inline engine that has 53 cubic inches per cylinder. Hope this helps!
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