L900 Diesel Engine ID
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Joined: Jul 2021
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Just got the info from Forel Publishing (https://www.forelpublishing.com/demo/Demo20082.pdf)
Just in case they remove the file from their website I just uploaded it on Google Drive (https://drive.google.com/file/d/1tFP...ew?usp=sharing)
K90 (Series code) => Ford L900*
S (Engine Code) => {
V (Assembly plant code) => {
Y90452 (Numerical sequence of assembly) => {
* CID stands for cubic inch displacement
** DSO stands for Domestic Special Order
Just in case they remove the file from their website I just uploaded it on Google Drive (https://drive.google.com/file/d/1tFP...ew?usp=sharing)
K90 (Series code) => Ford L900*
S (Engine Code) => {
1973 to 1976 (Diesel) => {
Cylinders => 8
CID* => 568
Type => Detroit 8V-71N - D.S.O.**
CID* => 568
Type => Detroit 8V-71N - D.S.O.**
}
1977 to 1979 (Diesel) => {
Cylinders => Unknown
CID => Unknown
Type => Cummins D.S.O.
CID => Unknown
Type => Cummins D.S.O.
}
1979 (Gasoline) => {
1979 (Gasoline) => {
Cylinders => 8
CID => 370
Type => Low propane gas - D.S.O.
CID => 370
Type => Low propane gas - D.S.O.
}
}V (Assembly plant code) => {
Kentucky Truck Plant
}Y90452 (Numerical sequence of assembly) => {
After looking at the table of page 43, it is between X80001 and Z25000, therefore the truck was cataloged as 1977 (Y is between X and Z).
Having this information, I now know the engine is a Cummins D.S.O. My goal was to get the engine type so I can order the right manifold so I still have some research to do. This document may give me the info if I manage to get the D.S.O. ID. However, to do that I need to find the warranty plate. The document says that typical trucks will have the plate on the "Latch face of left front door" and the "safety standards certification label" (which could give me some useful info for my quest) could be either on the "Quarter pillar opposite the latch face of the left front door" or "outboard side of the instrument cluster". English is not my first language so I'll make sure I understand what these locations mean and I'll post here what I discover (the truck is at my cabin so I'll post again in a week).
}Having this information, I now know the engine is a Cummins D.S.O. My goal was to get the engine type so I can order the right manifold so I still have some research to do. This document may give me the info if I manage to get the D.S.O. ID. However, to do that I need to find the warranty plate. The document says that typical trucks will have the plate on the "Latch face of left front door" and the "safety standards certification label" (which could give me some useful info for my quest) could be either on the "Quarter pillar opposite the latch face of the left front door" or "outboard side of the instrument cluster". English is not my first language so I'll make sure I understand what these locations mean and I'll post here what I discover (the truck is at my cabin so I'll post again in a week).
* CID stands for cubic inch displacement
** DSO stands for Domestic Special Order
Last edited by clementgamache; Jul 5, 2021 at 05:05 PM.
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Joined: Apr 2004
Posts: 34,526
Likes: 2,830
Welcome to FTE!
K90 = L900 diesel
S = Cummins via special order with no other info given
V = Kentucky Truck Plant
Y90452 = 1977 series number
I'm looking at the same thing you are.
Once you are looking at the truck, that tag will be pretty clear when you open the driver's door.
The tag will probably not give you specific engine information, as the 4th digit of the VIN, S as you noted above, is the same on that tag.
The tag will have color, interior, cab type, transmission, model number, axle, GVWR, sales district and the special order number.
Usually in these cases, an inspection of the engine will lead you to the specific type. If not, you can post pictures here and others will try to identify it.
Knowing it's a Cummins and the year of manufacture, you can go through the list of Cummins engines for that year also.
K90 = L900 diesel
S = Cummins via special order with no other info given
V = Kentucky Truck Plant
Y90452 = 1977 series number
I'm looking at the same thing you are.
Once you are looking at the truck, that tag will be pretty clear when you open the driver's door.
The tag will probably not give you specific engine information, as the 4th digit of the VIN, S as you noted above, is the same on that tag.
The tag will have color, interior, cab type, transmission, model number, axle, GVWR, sales district and the special order number.
Usually in these cases, an inspection of the engine will lead you to the specific type. If not, you can post pictures here and others will try to identify it.
Knowing it's a Cummins and the year of manufacture, you can go through the list of Cummins engines for that year also.
Logistics Pro
Joined: Dec 2003
Posts: 3,782
Likes: 876
From: Foothills of NC
Post a picture of both sides of the engine. Also, there should be a data plate riveted to the accessory drive housing on the drivers side front of the engine. That will tell you exactly what engine you have. The housing is what the fuel pump is mounted to.
My guess is you have one of three engines:
NH-250
NTC-290
NTC-350
My guess is you have one of three engines:
NH-250
NTC-290
NTC-350
Super Moderator
Joined: Apr 2004
Posts: 34,526
Likes: 2,830
NTC-250, NTC-290 & NTC-350 all show as regular production options with their own codes for model year 1977.
In other words, the engine code would be something other than S if it had one of those as OEM.
Many diesel engines listed for that year.
In other words, the engine code would be something other than S if it had one of those as OEM.
Many diesel engines listed for that year.
Logistics Pro
Joined: Dec 2003
Posts: 3,782
Likes: 876
From: Foothills of NC
And 903s. I forgot about the Vs and VTs.
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Joined: Apr 2004
Posts: 34,526
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V903s would have been engine code G for that year.
If you click on the 2nd link (or either maybe) in post 2 above, you can see the MPC and scroll down to engine codes.
If you click on the 2nd link (or either maybe) in post 2 above, you can see the MPC and scroll down to engine codes.
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