Official Cummins 6cta 450C thread

Thx!

Where I normally get mine, but my port engine has a different configuration than what they have. The hose that goes from the expansion tank to the heat exchanger is not the all rubber single piece formed hose. It has two short connector hoses and a metal 90 degree with a fitting in it that goes to one of the many small coolant hoses on top, so I had to special order from a Cummins dealer.

Pic of the hose I ordered, and what I found once I started tearing it down.

That metal elbow with fitting, $700 if you lose or it breaks. I looked at converting to the full rubber option, but it was going to be a lot of work to reconfigure all those little coolant hoses, so I just ordered the two connectors hoses, and the screw I had to destroy. One hose and the screw are in, but the other hose is backorder.

Lesson learned, when your starboard engine is 20 years newer than your port engine, don't assume all the parts are the same.

20220123_162055.jpg
 
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And people wonder why owners don’t keep up on PM’s :eek:

But check out the price of the hose kit vs the cost of just buying the hose clamps. The hoses themselves only run about $130? I wonder what sourcing the hoses individually would cost? Probably a lot more than that. Too bad they don’t sell the kit in “hose only” fashion.
 
But check out the price of the hose kit vs the cost of just buying the hose clamps. The hoses themselves only run about $130? I wonder what sourcing the hoses individually would cost? Probably a lot more than that. Too bad they don’t sell the kit in “hose only” fashion.


$465 for the hoses and $335 for the clamp set. Both sold separately, unless I am missing something. The gotcha is they don't give you any of the small hoses, those are uber expensive.

Screenshot_20220123-180418_DuckDuckGo.jpg
 
Gotcha. That still makes the hose kit only $130. Too bad you couldn’t just buy them. I think if I needed this I’d buy the hose kit and source my redundant SS clamps from Amazon.

Having spoken with them, the hose kit does not come with any clamps for $465. They assume you are reusing clamps or supplying your own. If you want new clamps, you can add them for $335.
 
Having spoken with them, the hose kit does not come with any clamps for $465. They assume you are reusing clamps or supplying your own. If you want new clamps, you can add them for $335.

ohhhhhhh.... so I completely misread their website. In my defense, it’s a bit ambiguous. But that does seem more like an SBMAR price for the hoses.
 
ohhhhhhh.... so I completely misread their website. In my defense, it’s a bit ambiguous. But that does seem more like an SBMAR price for the hoses.

Agree, it isn't clear.

I wish they would build and actual full hose kit. I think I am going to take the coolant vent hoses to a hydraulic shop and just have them made.
 
Someone needs to punch Tony in the arm then….that’s not right.

View attachment 119184
Right? That’s how I read it, too. I think what this means is one clamp for each end of the hose. You really need four clamps per hose if you want them to be redundant.

Does everyone use two clamps on each end of the hose on all engine hoses?
 
Right? That’s how I read it, too. I think what this means is one clamp for each end of the hose. You really need four clamps per hose if you want them to be redundant.

Does everyone use two clamps on each end of the hose on all engine hoses?

My boat only has doubles on water coming in from the outside. All my engine hoses are single clamp past the raw water pump. The maintenance manual drives a clamp inspection annually, but I certainly take a peak more often. Two wouldn't hurt.

If you were to have a clamp fail and the hose come off, engine instrumentation/alarms should let you know almost immediately. If it is just a leak, then it should be noticed by puddling in the engine pan. I check the ER pretty often while I am under lway. I know some have done cameras for the ER. Another project to add to the list.
 
My boat only has doubles on water coming in from the outside. All my engine hoses are single clamp past the raw water pump. The maintenance manual drives a clamp inspection annually, but I certainly take a peak more often. Two wouldn't hurt.

If you were to have a clamp fail and the hose come off, engine instrumentation/alarms should let you know almost immediately. If it is just a leak, then it should be noticed by puddling in the engine pan. I check the ER pretty often while I am under lway. I know some have done cameras for the ER. Another project to add to the list.
Why in the world would anyone need dual constant tension clamps?
ABYC requires dual clamps on exhaust systems only.
Most put dual clamps on the raw water system hoses that are below the water line.
I have seen dual clamps on some turbocharger discharge hoses but only few.
My thinking is if you check the clamps before start of each season you will be good to go with single constant tension clamps.
Never ever use cheap ACE, Ebay, Amazon, or HD "stainless" clamps. Always use quality marine grade hose clamps.
 
VALVE ADJUSTMENT

Well, finally, I finished my last annual maintenance task today.

Some interesting findings on my valves.
Port Engine - 1396.1 hours
Starboard - 301.1 hours

All valves on the Starboard were tight. The Port had 2 tight and 8 loose. Makes me think the Port got its 600 hour and not 1200 hour. Pretty sure the Starboard needed an initial adjust after it was installed.

Nothing outrageous, but did need some tweaks. Hopefully, that doesn't need to happen again for 600 hours.

Also, interesting to look at a thousand hours difference between valve trains (yes, worked on that corrosion today too, due to my shaft seal spraying earlier this year).

Port
20220213_090605.jpg


Starboard
20220213_090527.jpg
 
Can anyone tell be the part # to the transmission cooler on our 8.3 6 cta engine and the best place to buy one I thank you ahead of time
 
VALVE ADJUSTMENT

Well, finally, I finished my last annual maintenance task today.

Some interesting findings on my valves.
Port Engine - 1396.1 hours
Starboard - 301.1 hours

All valves on the Starboard were tight. The Port had 2 tight and 8 loose. Makes me think the Port got its 600 hour and not 1200 hour. Pretty sure the Starboard needed an initial adjust after it was installed.

Nothing outrageous, but did need some tweaks. Hopefully, that doesn't need to happen again for 600 hours.

Also, interesting to look at a thousand hours difference between valve trains (yes, worked on that corrosion today too, due to my shaft seal spraying earlier this year).

Port
View attachment 120525

Starboard
View attachment 120526
How did you bump for top dead center… I know the rest just don’t know how to rotate heard a few different things ?
 

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