CJ-10 SD-33 / Scout SD-33 Differences

[CareyWeber]

All,

Dave AKA dblkick asked me about the differences between the CJ-10 or Tug SD-33 and the Scout SD-33T. Here is what I have seen, but I am still working on getting it installed.

Differences:
Water Pump fan mounting flange moves the fan farther from the radiator / and closer to the block. The Scout water pump pulley can't be used with out a spacer.

Fix use the Scout water pump or the spacer for the tug.

The oil line from the block to the fuel injection pump interferes with the IHC motor mount on the passenger side.

Fix used to Scout fuel injection pump oil supply line which goes to a hole further back on the block this hole is on the tug block, but is plugged.

Throttle cable (only an issue if you are going to run the MZ pump) it would be best to have he CJ-10 one; other possibilities are a 1982 Nissan 720 diesel throttle cable (Eddie said a 91 Ford F-150 300ci cable might work).

The fuel filter may interfere with the stock Scout throttle cable if you run the Scout pump.

Fix move it to the Scout location requires the use of the Scout fuel return hard line and mount the filter on the Scout fuel filter bracket

Turbo oil drain line Scout has a large fitting threaded into the block. The CJ-10 SD-33 has a line going into the oil pan.

Oil pan they are both different, but either one looks like it will work. I think the Scout pan has more oil capacity, but that is just a guess based on a comment from Mogman.

Tug Alternator mounting bracket on the block.

Fix used the Tug alternator, or the Scout bracket and Alternator.

If you use the Tug alternator (its internally regulated) you'll have to figure out how to wire it correctly.

Exhaust this all depends on whether or not you run the Scout pump with the turbo or not. If you run the turbo your current exhaust will bolt right up when you swap the Scout exhaust manifold on the tug motor.

Intake once again it depends on your choice of pumps.

Fix use the intake that goes with the pump you are using

Thermostat housing is different.

Fix bolt the one on you want to use. I'm going to use the Scout housing and the Tug outlet I think.

Figuring out the electric shut off system from the tug (which does have a cold rack advance built into it John).

Fix use the Scout Manuel fuel shut off. I bought a Nissan 1982 720 manual and it has the wiring and a very good description on how the electronic fuel shut off works in it.

Note none are show stoppers!

I'll try to take some pics but I don't have a digital camera.

Carey

[CareyWeber]

Pics of Airforce Tug SD-33.

[CareyWeber]

Two more differences:

The Tug’s SD-33 has a much smaller pilot hole than the Scout’s SD-33 but its not a issue due to that the Scouts SD-33 has the pilot bearing installed in the flywheel unlike gassers.

Big issue the Tug SD-33 crank shaft does not have a dowel in it to index the flywheel like the Scout SD-33 has. My concern ensuring that I get the Scout flywheel indexed to ensure the engine is not out of balance and I need to be able use the timing marks on the flywheel to adjust valves and such.

Reference the second photo in the above post.

John to you have any suggestions to ensure that I get the flywheel indexed correctly?

Carey

[CareyWeber]

All,

I pickup my rebuilt clutch this afternoon, and if all goes as planned I should be installing my Tug SD-33 Thursday evening.

It cost me $202.00 for the clutch (it includes rebuild the pressure plate, pilot bearing, throw-out bearing pressed on to sleeve, disk, and resurfacing the flywheel.

Carey

[CareyWeber]

Well I just got back from the Ft Jackson Auto-craft Shop I have a tug SD-33 with a new clutch setting in my scout.

I still have things to do like mounting the accessories, and swapping the water pumps.

[John Donnelly]

Originally Posted by CareyWeber

Well I just got back from the Ft Jackson Auto-craft Shop I have a tug SD-33 with a new clutch setting in my scout.

I still have things to do like mounting the accessories, and swapping the water pumps.

Excelsior!!!!



Dieselin',

John

[dblkick]

I now have my Scout SD33T hanging from a chain in the shop & my "new" tug motor on the engine stand. I just started to swap some of the stuff over. Hope to be "smokin" by this time next week.

Dave

[CareyWeber]

Originally Posted by dblkick

I now have my Scout SD33T hanging from a chain in the shop & my "new" tug motor on the engine stand. I just started to swap some of the stuff over. Hope to be "smokin" by this time next week.

Dave

Dave,
1st postion your scout's SD-33 to #1's TDC
To verify all this I used my dial indcator on my Scout SD-33 with the head off.
At this time note the postion of the dowel in the Scout's SD-33 crank flange (it should be between 1 and 2 o'clock).

Then
Postion your Tug to TDC for # 1 and you will be able to tell how to mount your Scout flywheel. The auto flex plate had the hole for the locating dowel, but the Tug crank flange is not drilled for the dowel.

When #1 is at TDC the mark left on the crank flange should be at between 1 and 2 o'clock.

I thought about drilling it after I mounted the Scout flywheel, but I did not I may do it in the future if I ever pull the trany again.

You asked about the oil line for the injection pump.
I installed the Scout's oil line for the injection pump

The alternator has the same connections on both SD-33's

The drain into the pan per Mogman is for the turbo return line.

Carey

[CareyWeber]

Originally Posted by CareyWeber

Dave,
1st postion your scout's SD-33 to #1's TDC
To verify all this I used my dial indcator on my Scout SD-33 with the head off.
At this time note the postion of the dowel in the Scout's SD-33 crank flange (it should be between 1 and 2 o'clock).

Then
Postion your Tug to TDC for # 1 and you will be able to tell how to mount your Scout flywheel. The auto flex plate had the hole for the locating dowel, but the Tug crank flange is not drilled for the dowel.

When #1 is at TDC the mark left on the crank flange should be at between 1 and 2 o'clock.

I thought about drilling it after I mounted the Scout flywheel, but I did not I may do it in the future if I ever pull the trany again.

You asked about the oil line for the injection pump.
I installed the Scout's oil line for the injection pump

The alternator has the same connections on both SD-33's

The drain into the pan per Mogman is for the turbo return line.

Carey

Dave note there 2 timing marks on SD-33 crank shaft pulleys in the # 1 postion one is TDC (its marked 1|6) the other is 20° before TDC (its marked | only)

Carey

[dblkick]

OK;
I'm almost there.....Carey had mentioned something about an electric shut off?? I see nothing on this motor showing this. I'm trying to work out the throttle cable thing & realized......how do I shut if off

for more boneheaded questions.....stay tuned.

Dave