Engine/Transmission (1998.5 - 2002) Which engines have the piston oil jets?

[TWilkening]

As the title says. Do all the 24 valves have them, or was that just an ETH thing?

 

[jwilliams3]

You mean piston cooling nozzles?



Yeah all the engines have them or some form of them.

The oil rail saddle jets started with the 3rd gen engine.

 

[BJMarshall]

My 03 has j jets on the oil rail and there are plugs in the upper side of the main journal. I wonder if you could replace the plugs with jets and use both?

 

[jwilliams3]

Sure but you would probably not sufficient oil pressure to use them both properly.



If you have the spare time on your hands to pull the mains and the crank shaft... try it out and let us know how it does!

 

[TWilkening]

Yeah, I meant the piston coolers. I wasn't for sure because I had heard both. Thanks

 

[Loren]

The standard output 24-valve engines do not have piston cooling nozzles. The nozzles were added on the HO engine.



This is per the explanation from Cummins during the tour of their engine test facility in Columbus.



Loren

 

[Cummins360]

Do 12 valves have them??? I've allways assumed they do.

 

[Nate]

You sure?



I thought the Fram filters were messing up engines a few years ago because junk would clog up a piston cooling nozzle and the pistion would burn up?



I've never tore down a Cummins engine... just going off info I've researched/read.

The standard output 24-valve engines do not have piston cooling nozzles. The nozzles were added on the HO engine.



This is per the explanation from Cummins during the tour of their engine test facility in Columbus.



Loren

 

[jwilliams3]

Loren,

Sorry someone told you wrong.

They all have piston cooling nozzles... .



I have given quite a few tours my self.

 

[BK]

The standard output 24-valve engines do not have piston cooling nozzles. The nozzles were added on the HO engine.



This is per the explanation from Cummins during the tour of their engine test facility in Columbus.



Loren

I had read the same thing on some literature from Dodge about the difference between the HO and non-HO , back when the HO was first introduced.



There were even graphics showing the "added" cooling jet, from below the piston to help cool it. I can still picture the graphics.



I don't know if since the introduction of the HO, with the increase in the output of the standard engine if now it's just across the board now and there's no difference. It would make perfect sense not to be producing two different blocks.



But I am VERY sure there were lower cooling jets added to the HO that the non-HO didn't have, -back- when the HO was first introduced.

 

[BK]

From some quick googling...



Ok it's not the same literature I read, but it's from the "horse's" mouth.





http://www.cummins.com/na/pages/en/....cfm?uuid=00036766-DA2C-1E30-8DDB80C4A8F00000

"What is the difference in the HO engine versus the Standard Output engine?



What did we do to make the HO engine 305 horsepower and 555 lb-ft torque? First we beefed up components such as the pistons to handle this power level. We use gallery-cooled pistons which receive an oil spray to for cooler temperature and longer life. Then we modified software to create the greater horsepower and torque, while staying within all engine and driveline parameters. "

So back then it was added to the HO.

Maybe now all Cummins 24v in the Rams have it. . at some time they started using the same block for the non-HO and HO??

Is there even a "non-HO" now??

With the new auto I thought the numbers were the same?

I haven't been TDRam shopping for a few years, haven't kept track.

 

[jwilliams3]

First off... You guys have your wires crossed.



The 98. 5 through 2002 24 Valve all have what are known to us as "piston cooling nozzles". The piston cooling nozzle sits in the crank saddle itself below/above the upper main bearings.



With the introduction of the 3rd generation Cummins 2003 and up... Cummins started using in their HO models an oil rail based "J jet" that mounts in the bottom part of the engine block itself. It directs a pressurized jet of oil flow that actually enters the piston it self and cools the piston internally and lubricates piston, cylinder, rod etc (everything else the old piston nozzle did).



Dont confuse new information with old engines.



If you have any more questions let me know.









PS

HO blocks and Non HO blocks are the same for the 2nd gen 24V models.



Also, 3rd gen NON HO's and HO's are the same block.



The info you googled in the previous post was in response to a question directed about HO and Non HO 3rd generation common rail engines.

 

[BK]

With the introduction of the 3rd generation Cummins 2003 and up... Cummins started using in their HO models an oil rail based "J jet" that mounts in the bottom part of the engine block itself. It directs a pressurized jet of oil flow that actually enters the piston it self and cools the piston internally and lubricates piston, cylinder, rod etc (everything else the old piston nozzle did).

That lower nozzle shooting up to the underside of the piston is just what the literature spoke about.



I could swear, that was before the Gen 3... it was when the HO 1st came out.

 

[jwilliams3]

It happend with the introduction of the 3rd gen.



I used to install the darn things on the assembly line...



:-laf

 

[BK]

Well I'll have to admit my memory is suffering from time compression.

I found it in B&W. . just as JW says, it started with Gen 3.

Sorry JW, but the peice of advertising just soo stuck in my brain and I could of sworn it was associated with the 1st release of the HO.





http://cummins.com/au/pages/en/products/dodgeram/faq/index.cfm



This text is clipped from the end of a section that started with the heading of



"What are the 2001/2002 Dodge Ram Turbo Diesel Ratings?"



and had a lot of FAQs about that year / gen 2, and right at the end you cand see talked about the changes and then went on nicely in to the 2003 engines / Gen 3 ram.

What are the 2001/2002 Dodge Ram Turbo Diesel Ratings?



There are three engines Cummins provides for the Dodge Ram pickup for 2001/2002:



Standard 5-speed Manual Transmission: 235hp / 460 lb. -ft torque.

High Output 6-speed Manual Transmission: 245hp / 505 lb. -ft torque.

Automatic Transmission: 235hp / 460 lb. -ft torque.



//... ... clipped out the 3 pages of related FAQs... ... ... . //



What is the High Output Cummins Engine? What changes were made to the HO engine?





The High Output Cummins engine is a new rating launched in January 2000 for the Dodge Ram. It produces 245hp and 505 lb. -ft torque. To create and handle the high output the rating this engine has different components:



Controls: new software instructing fuel pump to deliver more fuel.

Fuel System: VP44 fuel pump components changed to allow for increased fuel delivery.

Injectors: Changed to allow for increased fuel delivery.

Pistons: New design for higher 17:1 compression ratio-

Head: powdered metal valve seat inserts for improved Durability.

Flywheel: larger to match to larger diameter clutch for handling higher torque output.





How did you make the 2003 Cummins Diesel Engine quieter?





The key is pilot (or pre-) injection using the high pressure common rail fuel system. A small amount of fuel injected before the main ‘event’ prevents the steep rise in cylinder pressure during combustion, and dramatically cuts the clatter associated with diesels. We also added a bedplate to stiffen the block for reduced vibration. And we rebalanced turbocharger components and added a silencer to quiet the turbocharger.







What are the 2003 CTD ratings?





Horsepower and Torque



Engine Type

Advertised hp

Torque



High Output (HO)

305 hp @ 2900 rpm

555 lb-ft torque @ 1400 rpm



Standard Output (SO)

250 hp @ 2900 rpm

450 lb-ft torque @ 1400 rpm



California Engine (and MA, ME)

235 hp @ 2700 rpm

450 lb-ft torque @ 1400 rpm









What is the difference in the HO engine versus the Standard Output engine?





What did we do to make the HO engine 305 horsepower and 555 lb-ft torque? First we beefed up components such as the pistons to handle this power level. We use gallery-cooled pistons which receive an oil spray to for cooler temperature and longer life. Then we modified software to create the greater horsepower and torque, while staying within all engine and driveline parameters.



//-------clipped--------//

 

[BK]

It happend with the introduction of the 3rd gen.



Dude I used to install the darn things on the assembly line...



:-laf

Dude, well see above,, appology extended. . as well - didn't know your history!





I was writting that post, just below yours quoted above, at just about the time while you wrote yours... . LOL, posting just missed each other.

 

[jwilliams3]

No problem here...



Just like to keep everyone on the right path.