For the last several weeks, I have been driving a 1980 F-700 grain truck; single rear axle, air brakes, 5-speed and 2-speed axle.
The hood hinges and opens like a pickup truck = most inconvenient.

There is a bit of quandary about the engine in this truck; it is DEFINITELY a V-8 TWO-STROKE Detroit; we are all agreed on that.

Everything about the engine and engine bay appear to be O.E.M.; if it has been swapped in, whoever did it covered their tracks very well.

However, the only reference I can find to a V-8 Detroit in these trucks is the Detroit Diesel 8.2L "Fuel Pincher" V8, which is a 4-stroke.

The engine in this truck is definitely two-stroke.

I would think 318/8v71, but it does not appear massive enough for that.

I think this truck originated in Canada; were Detroit engines other than the Detroit Diesel 8.2L available in Canadian trucks ?

Could it be a 8V-53 ?

Thanks for reading.

 

Someone here might know about heavier trucks, but this forum is really more about the light trucks (~1 ton and smaller). You might want to try the Large Truck forum.

 

Thanks!; before posting, I actually looked through the index for a large truck category and did not see one; maybe I need glasses.


Maybe a nice moderator could move this to the proper place; thanks.

 

I’m guessing it would be a 6-71 Detroit.

 

1980: The 4th digit of the VIN is the engine code:

 

That would be a good guess were it an inline six; it is a V-8.

 

Thanks !

If I am reading that correctly, then it is possible that it could be a 8V71 as I first suspected; the next time I am near it I will investigate the VIN; it may be a few days as we finished that phase of things a couple days ago.

 

Yes, a DETROIT V8 2-Cycle YAMAHA. They are sometimes hard to identify as they are usually covered in oil...

 

Wow, it would be very tough to get an 8V-71 in an F-700 without it looking like a total hack job and having half of it in the cab.

An 8V-71 is very large, has a blower sitting on top, and the valve covers are usually held on with two big hand nuts on either side.

An 8V-53 is unlikely. It would be a better fit than a 8V-71, but the 8V-53 is a very rare engine and was really only used in construction equipment.

A 6V-53 (V-6) would fit, and was used in a lot of trucks back in the 60's and 70's, Fords included.

You are sure it's a 2-stroke?

Got a picture?

 

It sure looks, sounds and drives like a two-stroke.
It is definitely a Detroit.
It is definitely a V-8
Size wise, it is comparable to a 3208 CAT
At idle, it sounds like it is turning half wide open; with the least bit of throttle, it is screaming like it is going to fly apart.
To be as old as it is, it is clean as a whistle; it barely gets rid of any oil; and it uses about half the fuel some of the other diesel trucks use doing the same work.
I filled it the other day and it only held 7 gallons; two old gas-burners that had done the same work held 39 and 47 gallons.
I will try to remember to take some pictures the next time I am around it.

One thing for certain, if we are wrong and it does turn out to be a four-stroke, it sure is trying to act and sound like a two-stroke.

 

8.2L:

https://sc02.alicdn.com/kf/HTB1p7vuJ...8-2-Engine.jpg

8V-71:

https://i.pinimg.com/originals/9d/8a...a55baf0600.jpg

 

Many thanks.

 

8V71 in a F series would be tight and heavy 1000kg ( ton) , are you sure its not a 6V53. 318 cu.
sorry, forgot about the V8 8.2 fuel pincher diesel in the above post.

 

When did the 8.2 fuel pincher start showing up in trucks?

The 8.2 I drove was an 82 or 83 with an 89 cab. It was a GMC that caught fire and been rebuilt. It was a single axle dump truck that may hauled 2 1/2 yards. It wasn't a decent 10 ton tandem dump truck.

 

In Fords, I thought 79-80 ??