Garage I worked for in Hagerstown, MD put a Detroit 4-53 in a two ton truck
they used for road service. It had a narrow power band and was LOUD, but
otherwise it was serviceable. I think a 3-53 might do well in an FSJ. I
once spent some hours replacing the head gasket in a 4-53, and it wasn't too
bad to work on. These are two-stroke, so the equivalent c.i.d. is roughly
double, in a hand-waving, back-of-the-envelope way. The OP specifically
asked for information on Cummins, though.

Earle

"Bret Ludwig" <bretldwig@yahoo.com> wrote in message
news:1150305859.942386.44930@h76g2000cwa.googlegro ups.com...
>
> Earle Horton wrote:
> > This has been discussed ad nauseam here. The six cylinders from over
the
> > road trucks are probably too big, but a four might fit, if you can get
your
> > hands on one. UPS and other users of mid-sized diesels rebuild them and
> > rebuild them, until they can't be rebuilt any more, then send them back
to
> > the manufacturer, who magically reconditions the blocks, for another
million
> > miles or so of use. Opportunities for a junkyard shopper to "pick one
up"
> > in usable condition are few and far between.
> >
> > A Cummins from a diesel pickup, maybe. If you can get your hands on
one,
> > the engine cost is likely to exceed the value of your Wagoneer.
>
>
> The 866 cid Cummins has no four cylinder version, but if it did, it
> sure as hell would not fit, as it would be the same size as the 4-71 or
> Series 50 Detroits.
>
> Medium and light duty diesels are not in terribly short supply. The
> commonest is the five cylinder Benz, but Isuzu, Mits, UD/Nissan, Deutz
> (there are liquid cooled Deutzes btw), and Iveco engines are out there.
> People who say they are not available are LIARS, like the
> untempleworthy-yes, I worote their stake president, lying is against
> the Word of Wisdom and unbecoming to the Church in the eyes of Saints
> and gentiles-Novak, or just too stupid to look in the right places.
>
> There is a four cylinder B Cummins that will fit beautifully, but it
> is a low revving high torque engine and it will tear up drivelines
> beautifully.
>
> Your best realistic swap is probably an Isuzu or Nissan. A turbo SD33
> or SD42 will fit where the AMC six will, bellhousings can be had, power
> is not tremendous but adequate-if you have the turbo and the right
> gears.
>
> The 6.5 GM engine is not my favorite but is reasonably OK when
> de-electronified and well cared for and plentiful. I would rather have
> a Isuzu or Nissan.
>
> The VM Cento six used in RPS trucks and in some German Jag saloon
> swaps looks appealing as well.
>

 

Garage I worked for in Hagerstown, MD put a Detroit 4-53 in a two ton truck
they used for road service. It had a narrow power band and was LOUD, but
otherwise it was serviceable. I think a 3-53 might do well in an FSJ. I
once spent some hours replacing the head gasket in a 4-53, and it wasn't too
bad to work on. These are two-stroke, so the equivalent c.i.d. is roughly
double, in a hand-waving, back-of-the-envelope way. The OP specifically
asked for information on Cummins, though.

Earle

"Bret Ludwig" <bretldwig@yahoo.com> wrote in message
news:1150305859.942386.44930@h76g2000cwa.googlegro ups.com...
>
> Earle Horton wrote:
> > This has been discussed ad nauseam here. The six cylinders from over
the
> > road trucks are probably too big, but a four might fit, if you can get
your
> > hands on one. UPS and other users of mid-sized diesels rebuild them and
> > rebuild them, until they can't be rebuilt any more, then send them back
to
> > the manufacturer, who magically reconditions the blocks, for another
million
> > miles or so of use. Opportunities for a junkyard shopper to "pick one
up"
> > in usable condition are few and far between.
> >
> > A Cummins from a diesel pickup, maybe. If you can get your hands on
one,
> > the engine cost is likely to exceed the value of your Wagoneer.
>
>
> The 866 cid Cummins has no four cylinder version, but if it did, it
> sure as hell would not fit, as it would be the same size as the 4-71 or
> Series 50 Detroits.
>
> Medium and light duty diesels are not in terribly short supply. The
> commonest is the five cylinder Benz, but Isuzu, Mits, UD/Nissan, Deutz
> (there are liquid cooled Deutzes btw), and Iveco engines are out there.
> People who say they are not available are LIARS, like the
> untempleworthy-yes, I worote their stake president, lying is against
> the Word of Wisdom and unbecoming to the Church in the eyes of Saints
> and gentiles-Novak, or just too stupid to look in the right places.
>
> There is a four cylinder B Cummins that will fit beautifully, but it
> is a low revving high torque engine and it will tear up drivelines
> beautifully.
>
> Your best realistic swap is probably an Isuzu or Nissan. A turbo SD33
> or SD42 will fit where the AMC six will, bellhousings can be had, power
> is not tremendous but adequate-if you have the turbo and the right
> gears.
>
> The 6.5 GM engine is not my favorite but is reasonably OK when
> de-electronified and well cared for and plentiful. I would rather have
> a Isuzu or Nissan.
>
> The VM Cento six used in RPS trucks and in some German Jag saloon
> swaps looks appealing as well.
>

 

Garage I worked for in Hagerstown, MD put a Detroit 4-53 in a two ton truck
they used for road service. It had a narrow power band and was LOUD, but
otherwise it was serviceable. I think a 3-53 might do well in an FSJ. I
once spent some hours replacing the head gasket in a 4-53, and it wasn't too
bad to work on. These are two-stroke, so the equivalent c.i.d. is roughly
double, in a hand-waving, back-of-the-envelope way. The OP specifically
asked for information on Cummins, though.

Earle

"Bret Ludwig" <bretldwig@yahoo.com> wrote in message
news:1150305859.942386.44930@h76g2000cwa.googlegro ups.com...
>
> Earle Horton wrote:
> > This has been discussed ad nauseam here. The six cylinders from over
the
> > road trucks are probably too big, but a four might fit, if you can get
your
> > hands on one. UPS and other users of mid-sized diesels rebuild them and
> > rebuild them, until they can't be rebuilt any more, then send them back
to
> > the manufacturer, who magically reconditions the blocks, for another
million
> > miles or so of use. Opportunities for a junkyard shopper to "pick one
up"
> > in usable condition are few and far between.
> >
> > A Cummins from a diesel pickup, maybe. If you can get your hands on
one,
> > the engine cost is likely to exceed the value of your Wagoneer.
>
>
> The 866 cid Cummins has no four cylinder version, but if it did, it
> sure as hell would not fit, as it would be the same size as the 4-71 or
> Series 50 Detroits.
>
> Medium and light duty diesels are not in terribly short supply. The
> commonest is the five cylinder Benz, but Isuzu, Mits, UD/Nissan, Deutz
> (there are liquid cooled Deutzes btw), and Iveco engines are out there.
> People who say they are not available are LIARS, like the
> untempleworthy-yes, I worote their stake president, lying is against
> the Word of Wisdom and unbecoming to the Church in the eyes of Saints
> and gentiles-Novak, or just too stupid to look in the right places.
>
> There is a four cylinder B Cummins that will fit beautifully, but it
> is a low revving high torque engine and it will tear up drivelines
> beautifully.
>
> Your best realistic swap is probably an Isuzu or Nissan. A turbo SD33
> or SD42 will fit where the AMC six will, bellhousings can be had, power
> is not tremendous but adequate-if you have the turbo and the right
> gears.
>
> The 6.5 GM engine is not my favorite but is reasonably OK when
> de-electronified and well cared for and plentiful. I would rather have
> a Isuzu or Nissan.
>
> The VM Cento six used in RPS trucks and in some German Jag saloon
> swaps looks appealing as well.
>