Identifying MPG and Heavy Duty Models

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
spddm0n
Posts: 12
Joined: Wed Aug 13, 2014 9:38 pm
Car: Xterra(s) (multiple), 720 Pickup

Identifying MPG and Heavy Duty Models

Postby spddm0n » Thu Apr 25, 2019 7:58 pm

I just purchased an '85 Nissan 720 Pickup King Cab and I'm trying to determine which "model" I have. :)

Does anybody know how to identify MPG models from Heavy Duty models? I also assume this means there is something in between (regular model)? I notice the service manuial pages suggest some of the componetns are only available in MPG or Heavy Duty models, such that the arrangement of engine components varies, depending on the model you have. I'm wondering if there is an easy way to identify which model I might have.

Thanks!


User avatar
DA82KC
Posts: 10
Joined: Thu Dec 27, 2007 6:40 pm
Car: 1982 Datsun King Cab 4X4 1983 Datsun Dual Cab 4x4, 1972 Datsun 1200 Coupe, 1976 Datsun 280Z

Re: Identifying MPG and Heavy Duty Models

Postby DA82KC » Thu Apr 25, 2019 9:26 pm

720 trucks that are classified as MPG models came with the Z20 engine. These engines ran a 9.4:1 compression ratio and also had a 5 pin ignition control module which integrated with the detonation control system. In the model code the letter J will be in the engine position and your model code will read out KJ720. Also, the best way to verify this would be to look at the silver under-hood build tag on the passenger side of the engine bay. Engine Will be Z20(S) and the axle code will be HF33.

User avatar
DA82KC
Posts: 10
Joined: Thu Dec 27, 2007 6:40 pm
Car: 1982 Datsun King Cab 4X4 1983 Datsun Dual Cab 4x4, 1972 Datsun 1200 Coupe, 1976 Datsun 280Z

Re: Identifying MPG and Heavy Duty Models

Postby DA82KC » Thu Apr 25, 2019 9:29 pm

The best way to identify the build of your truck is to read off the model codes on the understood silver plaque on the passenger side if the truck was built in Japan (all VINs starting with J) or the door jamb sticker if built in Smyrna TN. (all VINs starting with 1)

spddm0n
Posts: 12
Joined: Wed Aug 13, 2014 9:38 pm
Car: Xterra(s) (multiple), 720 Pickup

Re: Identifying MPG and Heavy Duty Models

Postby spddm0n » Fri Apr 26, 2019 10:16 am

Hey, thanks for the replies. Ok, so I know I have a Z24(S) engine, but the rest of the digits are different.
On my build plate, it says "TYPE" is JNY720. "MODEL" says, KNLY720TUFI51. Also, it says the axle code is CA41. I also noticed the transfer case is divorced on this pickup. I've never seen that before either.

So, what would indicate a Heavy Duty" model in the build plate? I'm still not certain I understand that. :)


Return to “Datsun 720”