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M923 First Oil Change Surprise

rrrr

Member
752
0
16
Location
Missouri
If your motor is siezed you could have major part expenses to get it up and running. Finding a replacement motor might be your best bet.
 

Chain-Saw

Member
59
1
8
Location
Menomonee Falls, WI
Ohhh,,, ya'll are scarin' me now!!! Thank God I've an auxiliary standby M923 to get me by till this one is fixed. (FYI - the one in my Avatar is fine,,, only 12 hours on that engine...)
 

m16ty

Moderator
Moderator
Steel Soldiers Supporter
9,580
218
63
Location
Dickson,TN
September 3rd, 2012.

Doghead, you are one mean moderator tonight. Me? I'd look at it positively...Time to get rid of that junk American diesel and put a good Deutz in it! If he picks one of the air cooled ones (Oh,wait, he's in Wisconsin, the AC diesels will start at -30, but provide no cab heat) so you can rebuild the pistons and cylinders one jug at at time, I guess the US engineers forgot that simple mechanical principle. Either way, he's gonna squeal like a pig when he gets done buying the parts.....:tinkerbell:!
Well you can also rebuild the Cummins one hole at a time. The only difference is when you pull the head you'll uncover two cylinders instead of just one on the Deutz.

The Deutz engines do provide cab heat. They use engine oil that runs to the heater core instead of water. German stuff is top notch but they tend to over-complicate things sometimes IMO.

It's not too bad to replace a liner while in the truck. Just not sure if it's just a liner this time. Lots of metal in the pan and the oil filter was shreaded too. Crushed and sliced apart, never saw that before.
If that's the case I'd pull be bearing caps before I went any further. If all that stuff went through the oil system you've probably got some bearing problems also. If you have any spun bearings or damaged crank, I'd find a replacement engine. It's going to cost more to fix that one than what you can find a replacement for.
 

Ord22

Member
571
4
18
Location
Stockbridge, Ga
With your liner broken up like it is, just in case you want to rebuild it, Look at your crankshft bearings and rod bearings. Once coolant gets onto the bearings, they are ruined. You will need to replace them, also. Just a little insight form a Diesel Mechanic.
 

jonesal

Mission Specialist
Steel Soldiers Supporter
413
69
28
Location
Brookings, SD
Doing a complete engine replacement will have its challenges. A NHC-250 in the can weights 4200 pounds. Forget your shadetree mechanic engine hoist. Even my mid-size tractor with loader could not pick it out. I've seen several completes go on GL for about $800 (that's everything) - but not sure if take outs or fresh. You people on the coasts have it good at your GL outposts. I'd snap up a motor for a spare at that price if it was close enough.

Good luck with your fix.

Al Jones
'84 M923
 

droprat

Member
193
7
18
Location
Las Cruces, NM
Coolant in the Oil

Had coolant in the oil in my 931. :( Check out my posts. Easiest thing we found after digging in and finding more issues was to swap the engine.
 

Chain-Saw

Member
59
1
8
Location
Menomonee Falls, WI
So, I've got a lead on a good motor at a decent price. Question is,,, can I "easily" swap a NHC250 from an 800 series truck into my 923? I know I'll need a lot of the externals swapped over, but is this a realistic option? As usual, all opinions and suggestions are welcome.
Wes.
 

Chain-Saw

Member
59
1
8
Location
Menomonee Falls, WI
Well, we haven't met yet, but you are the one who told me I missed the best part by not doing my own recovery on the first trailer I bought. Now I've spent most of the last year trying to make up for that! I look forward to discussing this in more detail. Thanks.
Wes.
 
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