Help V12 detroit diesel [Archive] - TheDieselGarage.com

: Help V12 detroit diesel


68joey
11-25-2007, 04:30 AM
can anyone tell me how to tell what this thing is and where to get rebuild kit its a v12 detroit motor and I don't know how to identify it, I am going to make a drag peterbuilt or sell it:smoke
email: 68joey@comcast.net
thanks

Diesel Brad
11-25-2007, 05:22 AM
I dont see a pic; but probably a 12V-71 they were put in the heavy duty trucks back in the day. What part of the woods are you located in ?

kblackav8or
11-26-2007, 06:44 AM
Pet Peeve - There is no U in Peterbilt. Most likely Brad is right, it is probably a 71 series. They are not cheap to work on.

redcatman
11-26-2007, 08:05 AM
Detroit Diesel or a Cleavite dealer....they are expencive to rebuild but perportionatly so.....just 6 more cylinder kits that a 6-71 LOL. serial no. should be located on the block just underneath the head toward the rear of the block...should be a tag or a raised stamp.....is the spec card/sticker missing from the valve cover?...that would be the easiest place to find it.

fred43
01-14-2008, 03:34 AM
i wouldnt bother with if for anything. my old 425 1693 cat would out run them in the mid 70s.they never had big torque. no pull in the hills. put the fuel to em and they cracked heads.

kblackav8or
01-14-2008, 05:40 AM
In some ways they are sort of like a VT-903, not very torquey but they rev pretty high, you have to drive them like you don't like them. I wouldn't necessarily work one as they will eat you out of house and home..but in a restored truck or to tow a race trailer, they attract a lot of attention and you you get to listen to them. They do have a nice sound.

1040 WreckerMan
01-14-2008, 07:10 AM
They are good engines, not a lot of torque down low but they can be built well. The problem with racing the 71's were they have poor heat transfer from the dry liner design. However, I raced several of them with very little issues. Those old 71's were tuff old engines. Just beat the PISS outta them and they'll keep chugging along.

Diesel Brad
01-15-2008, 04:36 AM
Pet Peeve - There is no U in Peterbilt. Most likely Brad is right, it is probably a 71 series. They are not cheap to work on.

I know when GM owned them they were cheap to rebuild (for a diesel)
I guess thats changed ?

1040 WreckerMan
01-15-2008, 06:07 AM
No, they are pretty inexpensive to work on compared to semi-current and current 4 stroke offerings from CAT, Cummins and Detroit. A 12v71 overhaul kit will run you around 4k depending on where you get it. An inframe kit a bit less. I prefer IPD brand parts. IPD has much better quality piston kits and their liners are actually round.

We ran a VERY large fleet of 92 Series (71's before that) until 1.5 years ago and had nothing but issues with Detroit rebuild parts. IPD really came through and our engines started holding up.

kblackav8or
01-15-2008, 06:13 AM
Did they ever make a 12V92 truck application? Nice A model by the way. I would like to see more pictures.

Diesel Brad
01-15-2008, 07:12 AM
Did they ever make a 12V92 truck application? Nice A model by the way. I would like to see more pictures.

Ive never heard of one unless it was off road. Strange, it seems most I have spoken with say the 8V-92 had great power; and its less cubes then a 12V-71 ?

french277
01-15-2008, 08:39 AM
The 12-92 was never used on road appaction but i heard someone did got the 12-92 on the road tractor but i dont have much details on hand yet but speaking of 12-71 it is a common engine for that era the 12-71 non turbo'ed can dish out about 650 HP max with stock N-65 injectors [ it the same injectors i work on the ole detorits generators ] but get the turbo'ed verison that diffrent story IIRC i dont have the chart with me right now but i know they can run much as 800 or so.

Diesel Brad the 8V-92TA somehow was little better than the plain jane 71's series but for powerwise it will never match the SOB 12V-71 anyway.

Merci, Marc

P.S. i found few you tube relaed to the Detorit Diesel escpally with the 12V-71 and few other as well i will post it later on the time if you really want see it

btw the 8V-92 is 736 CID and the 12V-71 is 852 cid and also the 12-92 is 1,104 cid

fred43
01-16-2008, 01:37 AM
there was a 12-92 nut was only for boats etc.. the 8-92 s in trucks were a lot of trouble but could be up to 475 hp....with the 71 if you can find waterbelow the ports heads, they hold up better. if you look along the heads just above the exhausts you will see a small flat ,,these were machined and bored out and a watter manifold was put on them to increse watter flow through the heads. most buul dozer applications had them.

The Ayatollah
04-12-2008, 05:05 PM
You could get them in scrapers, military and that sort of thing a while back.

junkmandan
04-14-2008, 04:43 AM
Kevin-----No on highway 12V92s were released , but someone in Pennsylvania has one .........john Costley has posted pictures of it several times on the ATHS site .

Hotrodx199
04-15-2008, 07:55 PM
From what i know so far. The 12v92's were only for Marine use. Thats the same for the 12v53's. The 12v71's However, were commonly used in highway trucks. They drank diesel like there was no tomorrow. But they were good engines. Anyways the answer to your question. the 12v71's arnt too expensive to rebuild. You can probally buy a decent rebuild kit for a decent price depending where u get it at.

Diesel Brad
04-16-2008, 10:52 PM
I didnt know they built a 12V-53 - I know 8V-53s were made but are rare birds !

michael b
08-29-2009, 11:19 PM
Kevin-----No on highway 12V92s were released , but someone in Pennsylvania has one .

http://img.photobucket.com/albums/v353/22512251/engines/proj1.jpg

Website- http://www.dnaparts.com/12v92.htm

black_dog106
08-29-2009, 11:28 PM
http://img.photobucket.com/albums/v353/22512251/engines/proj1.jpg

Website- http://www.dnaparts.com/12v92.htm

need a 20K front axle, just for the motor...:happymugs

M123KT-450
08-29-2009, 11:28 PM
12V53, 12V71, 12V92 didn't they go up to 12V149 ?

Mike

michael b
08-30-2009, 12:17 AM
12V53, 12V71, 12V92 didn't they go up to 12V149 ?

Mike

Yes and beyond to the V16

12V-149 Detroit Diesel
YouTube - High Performance 12V-149 Detroit Diesel


16V149TIB 2000Hp DDEC 3
YouTube - Detroit Diesel 16V149TIB 2000Hp DDEC 3



I use to pull a flatbed for a company that hauled a lot of these "large" engines (relative to truck engines). I really became fascinated with them...I wish now I had taken some pictures of those engines I moved around. The story I heard was California was making the marine operators re power their tugs etc with new "clean burn" engines. Part of the deal was the company had to permanently disable the old engine with a torch to get some sort of tax credit.. Anyway I saw lots of 12V71's, 12V92's, 3508, 3416's, 3412's KTA32's etc with with holes in the block. Seeing these neat old engines destroyed made me sick!

M123KT-450
08-30-2009, 03:29 AM
Yea i knew about the V16's i was just wondering if the V-12 made it too the 149's. . .
Gotta love them 3,200Rpm 2 cycle Detroit's. . . .

Mike

michael b
08-30-2009, 05:37 AM
Yea i knew about the V16's i was just wondering if the V-12 made it too the 149's. . .
Gotta love them 3,200Rpm 2 cycle Detroit's. . . .

Mike

I recently learned that Detroit made a 20V149 as well...Very rare

ddctech
08-30-2009, 06:25 AM
I have seen a 20v149, been a long time ago, bout 16 years to be exact. The 12v92 was more than just marine, they were used in many industrial apps as well.

michael b
08-30-2009, 09:39 AM
I have seen a 20v149, been a long time ago, bout 16 years to be exact.

I have never seen one first hand, but I found this picture on the web. I read somewhere there was only built for one year in the late 80's so I guess they are rare. What a monster, by the looks of the exhaust manifold looks like v6-v8-v6?

http://img.photobucket.com/albums/v353/22512251/engines/512463853xCOMJK_fs.jpg

ddctech
08-31-2009, 02:28 AM
Thats correct, one v-6, then a v-8, followed by another v-6. Ive worked on one 12v149 and one 16v149. Not too many out there to begin with. I enjoy working on those monsters, because its different, something you dont see every day.

acesneights1
08-31-2009, 04:05 AM
I wonder what setting the racks up on that are like ?

Birken Vogt
08-31-2009, 04:05 PM
Thats correct, one v-6, then a v-8, followed by another v-6. Ive worked on one 12v149 and one 16v149. Not too many out there to begin with. I enjoy working on those monsters, because its different, something you dont see every day.

My back-of-the-envelope calculation puts the 20v149 at about 2000 horsepower. What would be the advantage to building one that big vs. using an EMD model in the same HP range?

Birken

Fuel749
09-02-2009, 12:36 PM
Check out this August issue of Overdrive.A v12 powered Pete hot rod.

ddctech
09-03-2009, 01:58 AM
I think the 20v149 was ddec only, correct me if im wrong though, so no rack to set

french277
09-03-2009, 02:07 AM
My back-of-the-envelope calculation puts the 20v149 at about 2000 horsepower. What would be the advantage to building one that big vs. using an EMD model in the same HP range?

Birken
Grand diffrence entre les deux est la gamme de TR-MIN la 149 série tourne vraiment à 1800 TR-MIN Max tandis que l'EMD est limité à 900 TR-MIN Max donc vous pouvez voir les vitesses de diffrent mettre et obtenir 2000 HP sur EMD vous aurez besoin de 12V-710 à l'évaluation stable mais ouais nouveau 2000 HP EMD est la série 8V-710.

Pour la série EMD plus vieille la 645 série à coup sûr le V-12 travaillera useage à 900 ou 750 TR-MIN.

The big diffrence between the two is the RPM range the 149 series do spin at 1800 RPM max while the EMD are limited to 900 RPM max so you can see the diffrent speeds setting and to get 2000 HP on EMD you will need 12V-710 at the steady rating but yeah the new EMD 2000 HP is 8V-710 series.

For older EMD series the 645 series for sure the V-12 will work in that useage at either 900 or 750 RPM.

Merci,Marc