Pulled the valve cover options plate and trying to decode what the engine is/has.
I suspect it was rebuilt in 1988 but we are not sure nor do we know what options or injectors (power level) we have.
Here's what's on the plate. If there's a document somewhere will all this listed I'd love to know where so I can save it.
Anything jump out? Anything you guys can tell me about what we have?
Model: 7087-7040
Unit No 8VA-22755
Max RPM no load 2150
Rated HP ---
Cont HP ---
Lifter Bracket 32
Oil Dist. 203
Oil Filter 164
Crkshft Pulley --
Exhaust Manif 157
Engine mtgs --
Starter 219
Flywheel HSG 291
Dipstick 393
Vent System 374
Crkshft Pulley Blt ---
Fuel Pump 71
Fuel lines 757
Air Comp 249
Muffler A Conn 200
Flywheel 410
Oil Filter Tube 71
Bal. Wgt. Cvr. 19
WTR Pump 42
INJ. 77
Air Inlet HSG --
Rocker Cover 100
Tach Drive 131
Oil Pan 168
Oil Cooler 423
Fan --
Thermostat 107
Blower 66
Gov Mech 753
Batt Charge Gen --
Rev. 1 S.O. 950250X
The first thing to do is verify that the engine serial number matches the valve cover data plate. The plate could be off another engine.
Quote from: DriverGT5 on June 11, 2014, 07:19:41 AM
Model: 7087-7040
Unit No 8VA-22755
http://2-cycle.mtu-online.com/extras/engine-model-number-decoder (http://2-cycle.mtu-online.com/extras/engine-model-number-decoder)
The data tag info is best deciphered by a dealer, Clifford may have the codes..
Max RPM no load 2150
Rated HP ---
Cont HP ---
Quote from: Boomer on June 11, 2014, 08:27:26 AM
The first thing to do is verify that the engine serial number matches the valve cover data plate. The plate could be off another engine.
Unfortunately 25 years of dirt and oil make finding the stamped number on the block next to impossible without me removing the engine and steam cleaning the whole thing. I just spent 20 minutes rubbing off all the places I think it should be and came up with snake eyes.
It's not an issue right now. Everything runs OK. I was just hoping to find out what I could about what we just got. So far it's been one surprise after another... mostly pleasant.
Quote from: DriverGT5 on June 11, 2014, 09:15:34 AM
Unfortunately 25 years of dirt and oil make finding the stamped number on the block next to impossible without me removing the engine and steam cleaning the whole thing.
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fwww.powerlinecomponents.com%2Fliterature%2Fdetroit_diesel%2Fimages%2Fv71_serial_number.gif&hash=5ce575684abe797012f29ed91eacda98f5bcc4db)
http://engine.od.ua/ufiles/DETROIT-Model-Serial-number.pdf (http://engine.od.ua/ufiles/DETROIT-Model-Serial-number.pdf)
I had this document that shows how to decode the model number but the location of the serial number was confusing to me.
So I should be looking above/behind the starter?
not behind the starter, the other side
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fi1.ytimg.com%2Fvi%2F2dolBw-b_n4%2Fhqdefault.jpg&hash=d96f8e05306a4933ad25c518d61767a5845a8413)
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fwww.powerlinecomponents.com%2Fliterature%2Fdetroit_diesel%2Fimages%2Fv71_serial_number.gif&hash=5ce575684abe797012f29ed91eacda98f5bcc4db)
https://www.youtube.com/watch?v=2dolBw-b_n4 (https://www.youtube.com/watch?v=2dolBw-b_n4)
I just found mine near the end of the exhaust manifold on the side opposite of the starter. It was covered in no less than half inch of grease and oil. If you're having trouble reading the numbers, try taking a picture of it with your phone.
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FZcZ46rq.jpg&hash=66b1aff089683c32ad86a2d056b31e58522eadde)
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F2iRnZ95.jpg&hash=6401363d99933a4abeb860c6c75ed83102a75623)
Larger Resolution Version (http://i.imgur.com/SxgN7qq.jpg)
I apologize for the crap photo but I'm laying on my back and this is as good as it gets with my phone. This is the back side of the motor behind the oil filter where all the info I can find seems to say the number should be.
I think it should be around the drain tube so after taking this picture I soaked this in brake cleaner and cleaned it off but there's nothing on the block that I can see except the casting marks. I can take another picture tomorrow (it's raining now) showing the clean block but I'm not even sure I'm in the right spot. I've swallowed a fair bit of dirt and oil at this point laying under this monster. :)
(https://lh6.googleusercontent.com/-SfcNcqI5v_k/U5jYTgI-9xI/AAAAAAAAAUg/KlbWHgkmF-s/w816-h612-no/RT+SIDE+BACK.jpg)
On a side note, if I just changed the oil and it immediately is pitch black on the dipstick again, would you change it a second time right away? Drive it 1000 miles then do it? Wait the full 10,000 miles? The previous owner said "the oil changes itself. I just add more as it burns/leaks" so the first thing I did was order filters and oil. I'm sure it hasn't been changed in years. >:(
The last time I saw oil like this was a customer in our shop with a diesel Jetta that hadn't been changed in 30,000 miles.
I am not 100% sure, but I think it would be a little higher up than your circle. Watch that video again a few times. It took me nearly two hours to find mine-- keep at it, it is there...somewhere.
https://www.youtube.com/watch?v=2dolBw-b_n4 (https://www.youtube.com/watch?v=2dolBw-b_n4)
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F421xk2f.jpg&hash=cad5e2497bd25287fe491b07fcb9e86512577214)
(https://busconversionmagazine.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FuXKxBNM.jpg&hash=93edb02e9b30c31d3c540d504ddff1067a531c6d)
My engine looks a little different too. Instead of the 4 cover plates I have two larger ones with two bolts in the center and a metal tab between them.
That's why I wonder if mine is in a different place.
BTW, is your number in that second picture? I can't see it in the close up.
My number is not in the second picture-- It is one of the places it could have been. I nearly got myself stuck between the frame rail and the engine taking that picture. See my earlier post for where I found my number.
Quote from: sparkplug188 on June 11, 2014, 04:09:57 PM
My number is not in the second picture-- It is one of the places it could have been. I nearly got myself stuck between the frame rail and the engine taking that picture. See my earlier post for where I found my number.
LOL
Anyone know why my air box access plates are two big plates on each side instead of the four smaller ones I seem to see on all the other 8V71 engines?
Am I just reading into this too much? I was thinking it may have some hint as to where my missing serial number may be since I can't seem to find them at either of the drains on the block.
Stolen motor... :o
???
(https://lh4.googleusercontent.com/-iQe-PIPDYZc/U5nJWkjJF2I/AAAAAAAAAVs/HpP7lBQXJiQ/w871-h653-no/IMG_2214%255B1%255D.JPG)
(https://lh5.googleusercontent.com/-nyj7x-Fj4hI/U5nREw_nJBI/AAAAAAAAAWU/utznfS2tyzE/w871-h653-no/IMG_2229%255B1%255D.JPG)
Here's a picture I found online of the same setup as my engine. Better without all the oil and dirt...
I also noticed my valve covers say "GENERAL MOTORS DIESEL" where most of the motors I've seen say "DETROIT DIESEL" on them.
(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTgsBpjAflKiyjTsx0rQQEpiI64wPxfLNzBtrx8SBfjJPUer7y1)
you have what we call an old style block, has smaller water jackets than new style ( small airbox covers) the old style is not very desirable in high HP applications
Quote from: c-coop on June 12, 2014, 04:35:37 PM
you have what we call an old style block, has smaller water jackets than new style ( small airbox covers) the old style is not very desirable in high HP applications
That makes sense. So I guess any hope of my engine being replaced in 1988 is evaporating quickly...
Any idea when the "old style" blocks were phased out?
Any idea where the serial number may be located on the older blocks?
Thanks for all the help everyone!! I still have soooo much to learn on these things still. I go out there just about every day and try to follow hoses/lines to learn what things are and what they do. I've only got about 1/2 the systems figured out so far. This bus has more tanks and reservoirs than the last 50 cars I've owned combined. :-\
That block was phased out in 1974 they do leak and break liners ::) come get it Az and I will give you a TA late model 71 I was going to sell it for junk anyway,fwiw you can find the serial in 4 different locations on a 8v71
You have photos of the top of head ? then we can see if you have the antique heads,when they are really old the valves covers have GMC embossed I have a set we removed from Tom's 8v71
General Motors Diesel division of GM was changed to "Detroit Diesel" div. in 1965. In 1970 it was changed again to Detoit Diesel Allison. Now it's just called Detroit and is no longer owned by GM or Roger Penske, but Diamler. The old tin valve covers were stamped General Motors Diesel before the cast alum covers came out. Always wanted to powder coat one and hang it on the wall for posterity.
Boomer I will bring you both when we come one of the stamped GMC and one General Motors Diesel I thought about having the GMC's chromed they have the T looking hold down bolts neat
Cool! Are you actually coming??
I was going to bring my old 671 cover back from Gene's with me but no room to haul it. It had the old T shaped aluminum breather on it. Would have been a nice momento of the fire that we survived.