Engine/Transmission (1994 - 1998) A kit to improve coolant flow - no more dead-ending at the rear of the block!

[Bobcat698]

I'm sure you guys saw my headgasket thread. Here is a bit more on the coolant flow-through kit for the 5. 9L block:



It is my understanding that on the larger trucks equipped with the 5. 9L Cummins, a coolant line is connected at the back of the block (where a freeze plug is placed on Ram pickups) that runs back to the radiator, making the cooling system a flow-through system rather than dead-ending at the back of the motor, therefore keeping the rear cylinders cooler. I plan on buying the kit from Cummins and installing it while I have it torn apart.



Not sure if this would be for people running mild mods. . but may be an option for higher HP guys.



Here are the parts Cummins lists for the kit.



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[Gary - K7GLD]

I'd read some of that in your other thread - thanks for the more detailed post, keep us informed on how difficult and effective that mods turns out.

 

[Bobcat698]

I'd read some of that in your other thread - thanks for the more detailed post, keep us informed on how difficult and effective that mods turns out.

No problem



I'll price it out tomorrow and let you know, as well.



I'll try to get pictures of my install when I finish.

 

[rono]

This sounds like an excellent addition to our trucks. Another Dodge attempt to cut costs.



Does the engine have to be removed to install this kit, or can it be done with the engine in place?



Ron

 

[Bobcat698]

By popular demand, here are the Cummins sheets with the part numbers that I have:



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I really apologize to everyone that has emailed me and private messaged me and got no response, I have been very busy and could not find the sheets I had scanned.

 

[Bobcat698]

I used the #13 90º fitting BTW, along with the plate and o ring.

I plumbed it into the coolant return line that comes out of the firewall.

I just plugged the other holes.

 

[JBrookshire]

eep

Enterprise engines sells a kit simular to that kit. I have one on my truck it also helps with srucks that turn higher RPMs from building up to much pressure in the cooling system. Justin

 

[CRohwedder]

Do you have to pull the motor or just the head?

 

[bgilbert]

Do you have to pull the motor or just the head?

IIRC, only the transmission, flywheel/flexplate, and engine adaptor has to be removed on a 2nd gen to access the rear freeze plug.

 

[Nate]

Pics aren't working for me.

 

[Bobcat698]

IIRC, only the transmission, flywheel/flexplate, and engine adaptor has to be removed on a 2nd gen to access the rear freeze plug.

We installed mine with just the head off. The plate required a small amount of grinding on the bottom to allow for clearance against the bellhousing.



I have NO idea what kind of difference, if any, it made, though I imagine it could only help things.



I will be plumbing the kit into the upper radiator hose that connects to the thermostat, and regulate the pressure to 30-35PSI per Enterprise engine to prevent freeze plug blow-outs.

 

[DBraunig]

Thanks Bobcat, that's what i was looking for



Dave

 

[KAlder]

funny to see this come up. i just replaced a 6bt in a yard goat a couple weeks ago, it had one on the rear of the block to run coolant to the air compressor. it was an older style that used a gasket-when i went to order a gasket cummins says they dont make the gasket anymore- have to buy the new manifold that uses the oring.

 

[JBrookshire]

air...

I did not pull any thing off. I used a long,long air chisel bit and was able to knock it side ways and worked it out.

 

[Shadrach]

KAlder is correct. This is used for a water cooled air compressor. Items 13 and 1 are for the water lines and the temp sender, which goes in where # 1 does in this picture in our trucks, goes in where item # 6 plug is. Even if you leave all the plug in it will still keep your rear frost plug from blowing out. You could also add an aux temp sender in where # 13 is for a gauge and still have the stock one. Shadrach

 

[LanceD]

I took my cab off to put mine on:

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haha just kidding I already had the cab off to spray the speedliner, and I went ahead and put the block on there. I haven't ran any hoses yet though. I installed it for watercooling the air compressor that I will put on eventually.

 

[RDupree]

i have one of those blocks for sale,if anybody wants one. half the price of a new one from cummins!

Randy

 

[Vaughn MacKenzie]

I think the coolant bypass mod is worthwhile if you tow much. When I pulled the head on my '96 at 386k cylinder #6 had considerably more wear than all the others. The hone marks were almost completely gone while there was still quit a bit left on the rest. I think this is due to that hole running hotter.