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mkkm

Posted 1/28/2025 00:42 (#11077146)
Subject: Cat c18

Gilead Indiana

I was reading articles on this engine being used in the challengers. I understand why Agco went away from them, but did cat quit making them also? I read they didn't meet EPA regs and then I thought I seen that they did. Just kinda curious,

Roblyn

Posted 1/28/2025 00:56 (#11077150 - in reply to #11077146)
Subject: RE: Cat c18

Good day
A CAT C18 is fiscally the same size block as a C15.....C16...and can be .mixed and match into a C17
Probably the only downside to the 18 is that the liners are a little more prone to electrolysis
Good luck

RecreationalTillage

Posted 1/28/2025 00:56 (#11077151 - in reply to #11077146)
Subject: RE: Cat c18

West Central MN

C18 is still in production and used in many new Cat machines, oil & gas applications, marine, and gensets.

Here's an example
https://www.cat.com/en_US/products/new/equipment/articulated-trucks/...

The "not meeting emissions" is an old wives tale that won't die.

Jon

Posted 1/28/2025 06:39 (#11077244 - in reply to #11077146)
Subject: RE: Cat c18

Callao Missouri

A c18 on a barko tub grinder can make a 1500lb bale of hay go poof. I can watch that all day, very satisfying.

71307140

Posted 1/28/2025 06:46 (#11077256 - in reply to #11077146)
Subject: RE: Cat c18

Central Illinois - west of Peoria

Just installed a new set in one of our tug boats for use on the Illinois river , we’ve got 14 running from 475 to 600 hp
Usually get around 30,000 hrs on them before we pull them out for rebuild . Only weak spot we’ve seen is the lower counterbore liner o rings eat into the block - have to go to the machine shop and get bored and sleeved in that area . Some minor issues with injector o rings leaking also . We also have several Cummins QSK 19-‘s and we have better luck with the Cat C-18’s …..
I’d think the C18 would be an awesome tractor engine ..
No emissions on marine engines till you get over 805hp ..

Edited by 71307140 1/28/2025 06:49

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Kelly

Posted 1/28/2025 07:20 (#11077323 - in reply to #11077256)
Subject: RE: Cat c18

NC KS

Very interesting! I wonder why marine gets exempted on emissions in the lower horsepower classes?

Not much on it for drives. Is that a dropbox on the back of engine?

1070

Posted 1/28/2025 08:29 (#11077458 - in reply to #11077323)
Subject: RE: Cat c18

south west in

Would it be that a marine running at a steady speed would be cleaner? Just a guess.

JD 9660

Posted 1/28/2025 11:02 (#11077688 - in reply to #11077458)
Subject: RE: Cat c18

Southern PA

1070 - 1/28/2025 08:29

Would it be that a marine running at a steady speed would be cleaner? Just a guess.

Wouldn't they run at varying speeds depending on how much push/speed is needed for the job?

71307140

Posted 1/28/2025 11:13 (#11077705 - in reply to #11077688)
Subject: RE: Cat c18

Central Illinois - west of Peoria

Yeah these are harbor tugs - constantly on and off the throttle

WestMIguy

Posted 1/28/2025 08:35 (#11077477 - in reply to #11077323)
Subject: RE: Cat c18

Kelly - 1/28/2025 08:20

Very interesting! I wonder why marine gets exempted on emissions in the lower horsepower classes?

Not much on it for drives. Is that a dropbox on the back of engineo?

The maritime industry has a very strong lobbying force. Just look at the Jones Act. I am guessing that has something to do with it.

jeff gordon

Posted 1/28/2025 09:47 (#11077602 - in reply to #11077323)
Subject: RE: Cat c18

Mather, Manitoba

over 700hp exempt????

RecreationalTillage

Posted 1/28/2025 10:04 (#11077625 - in reply to #11077602)
Subject: RE: Cat c18

West Central MN

750 hp is the cut-off point for non-road emissions

farmwithjunkrrv

Posted 1/28/2025 07:22 (#11077326 - in reply to #11077256)
Subject: RE: Cat c18

South west of Winnipeg MB

71307140 - 1/28/2025 06:46

Just installed a new set in one of our tug boats for use on the Illinois river , we’ve got 14 running from 475 to 600 hp
Usually get around 30,000 hrs on them before we pull them out for rebuild . Only weak spot we’ve seen is the lower counterbore liner o rings eat into the block - have to go to the machine shop and get bored and sleeved in that area . Some minor issues with injector o rings leaking also . We also have several Cummins QSK 19-‘s and we have better luck with the Cat C-18’s …..
I’d think the C18 would be an awesome tractor engine ..
No emissions on marine engines till you get over 805hp ..

Do they cool with river water?

71307140

Posted 1/28/2025 07:36 (#11077347 - in reply to #11077326)
Subject: RE: Cat c18

Central Illinois - west of Peoria

We have copper grid coolers that are recessed in the hull of the boat for heat exchangers- closed system and use antifreeze.
Gearbox is a Twin Disc 5170 marine gear with 5.17:1 reduction.
Don’t have a clue on the emissions issue - like most railroad equipment we run 24-7 - doesn’t make sense why a combine or tractor that runs 2-300 hrs a year has all the emissions and we don’t …marine and railroad have a better lobbying group than AG ???

Edited by 71307140 1/28/2025 07:39

1972RedNeck

Posted 1/28/2025 09:15 (#11077549 - in reply to #11077256)
Subject: RE: Cat c18

Townsend, Montana

Is that a JWAC on the left side?

Any chance you could get me a serial number prefix?

71307140

Posted 1/28/2025 09:20 (#11077557 - in reply to #11077549)
Subject: RE: Cat c18

Central Illinois - west of Peoria

TNA prefix
Aftercooler circuit on LH side , JW circuit on RH side
Separate circuit aftercooled …. Takes 2 coolers per engine

RecreationalTillage

Posted 1/28/2025 07:13 (#11077311 - in reply to #11077146)
Subject: RE: Cat c18

West Central MN

One can still purchase a C18 in a tractor
https://www.mobiletracksolutions.com/3630t

jd8850

Posted 1/28/2025 08:09 (#11077410 - in reply to #11077311)
Subject: RE: Cat c18

Roseglen, North Dakota

If I remember correctly that is the engine that was supposed to be in the much ballyhooed new Big Bud.
Not sure if even one has been made yet.

Edited by jd8850 1/28/2025 09:25

JD 9660

Posted 1/28/2025 10:58 (#11077685 - in reply to #11077146)
Subject: RE: Cat c18

Southern PA

mkkm - 1/28/2025 00:42

You can buy a new C15 for trucks again, my understanding anyway. A C15 can be built into a C16, C17, or C18.

Hard to beat those engines, IMO.

CND

Posted 1/28/2025 12:23 (#11077802 - in reply to #11077685)
Subject: RE: Cat c18

Anamoose, ND

I was told the C18 was bullet proof but found out this year that is not completely true. They now have an updated piston to fix this issue. Overall it was a cheap engine to rebuild.

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Tazzerblue

Posted 1/28/2025 18:57 (#11078399 - in reply to #11077802)
Subject: Was that factory tune or something else??^^^

SW MN

Do you have a photo of the new/old pistons S/S?

CND

Posted 1/28/2025 19:30 (#11078443 - in reply to #11078399)
Subject: RE: Was that factory tune or something else??^^^

Anamoose, ND

Stock 865c. Old design was a two peace piston. Updated design is a one piece piston. I have no pics of the new design because the Cat kit had the pistons already in the sleeve. A friend from church had this happen under warranty twice.

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