Official Cummins 6cta 450C thread

[Joint Custody]

Hey - can you send photo of the front of your engines (stbrd) where the exhaust is? I will send a photo of mine. We didn't need to remove any exhaust piping.

Will do . I will be at the boat wednesday.

 

[Clinton Skinner]

Hey all - an update on loss of boost on starboard engine. Had turbo off and checked, all ok. When mechanic was re-fitting he said "I think I found your problem" - see image attached.

Turns out when I had the AC removed and serviced last time, the previous mechanics failed to install the bottom bolts to hold it on to the brackets - 2 x top bolts ok 2 x bottom bolts nope.

 

[douglee25]

That'll do it.

 

[techmitch]

Hey all - an update on loss of boost on starboard engine. Had turbo off and checked, all ok. When mechanic was re-fitting he said "I think I found your problem" - see image attached.

Turns out when I had the AC removed and serviced last time, the previous mechanics failed to install the bottom bolts to hold it on to the brackets - 2 x top bolts ok 2 x bottom bolts nope.

I hope he is held responsible. Those suckers ain't cheap.

 

[Joint Custody]

Hey - can you send photo of the front of your engines (stbrd) where the exhaust is? I will send a photo of mine. We didn't need to remove any exhaust piping.

Removed the port one. Got home late last night so haven’t taken it apart yet to see what it looks like. Port only took 30 minutes to remove.

Here are pictures of starboard. If the port one looks good I might not do starboard but my OCD brain will feel like the boat is not balanced right.


Don't know if I should try the route at the transmission end and over the top or go in from the rear. My guess I will have to do both. I will be doing the impeller at the same time so I will be wedge in from the rear. I Also don't know if the exhaust tube has to be move or taken out.

 

[Joint Custody]

Do any of you know where to buy the right color match paint for the cummings ?

 

[bbwhitejr]

Do any of you know where to buy the right color match paint for the cummings ?

Rustoleum Canvas White from HD was almost perfect. Painted 6CTAs in the 420DA as well as the QSCs in the 44DB.

Was very pleased.

Bennett

 

[Joint Custody]

Rustoleum Canvas White from HD was almost perfect. Painted 6CTAs in the 420DA as well as the QSCs in the 44DB.

Was very pleased.

Bennett

Thank you.

 

[ZZ13]

Rustoleum Canvas White from HD was almost perfect. Painted 6CTAs in the 420DA as well as the QSCs in the 44DB.

Was very pleased.

Bennett

Yup. That’s good enough. If you need to brush on, a 50-50 mix of Rustoleum white and almond gets close enough to the same color.

 

[Joint Custody]

Yup. That’s good enough. If you need to brush on, a 50-50 mix of Rustoleum white and almond gets close enough to the same color.

That will be great to get to the tight spots.

 

[Joint Custody]

What do you all think.

This is port after cooler. 23 years and never serviced. Other than the bottom having some old impeller parts it looks pretty clean to me.

Do I pull starboard or not. I think I will still pull the cooler out of this and clean.

 

[ZZ13]

View attachment 162602View attachment 162603View attachment 162604View attachment 162606View attachment 162607View attachment 162608What do you all think.

This is port after cooler. 23 years and never serviced. Other than the bottom having some old impeller parts it looks pretty clean to me.

Do I pull starboard or not. I think I will still pull the cooler out of this and clean.

What you can see looks good. Most vulnerable part is hidden by the o-ring and the core, which is the mating edge of the aluminum housing. If you pull the o rings off and slide out the core, you can check out the inner face and edge of the two ends of the housing.

 

[Clinton Skinner]

Hey JC - are you fresh water? We just got my starboard core out (had to cut casing off it) pics attached. As we dive deeper the worse it gets. Found out now that the previous mechanic had used some sort of crappy sealer around the end caps to seal them, it went all hard and flaked out. Port AC had started to flake too but no water leaking. Didn't help that they weren't bolted on properly and were vibrating.

 

[Joint Custody]

What you can see looks good. Most vulnerable part is hidden by the o-ring and the core, which is the mating edge of the aluminum housing. If you pull the o rings off and slide out the core, you can check out the inner face and edge of the two ends of the housing.

Hey JC - are you fresh water? We just got my starboard core out (had to cut casing off it) pics attached. As we dive deeper the worse it gets. Found out now that the previous mechanic had used some sort of crappy sealer around the end caps to seal them, it went all hard and flaked out. Port AC had started to flake too but no water leaking. Didn't help that they weren't bolted on properly and were vibrating.

yes fresh water. I don’t envy what you’re dealing with.

 

[Clinton Skinner]

Complete clusterf..k - guys are on boat now inspecting inlet manifold for any signs of salt in the intake.

Will certainly be taking the previous crowd to task.

 

[Joint Custody]

Thank you all for the advice. I had never done an after cooler service so I was a little apprehensive about doing it. It is very easy and I don’t see why you wouldn’t do them at regular intervals. Now this is just my port all cleaned painted and going back in. Going to tackle the starboard this week.

The mating edge and interface were perfect. Something to be said for fresh water.

 

[Three Amigos]

I couldn't find any thread for the Cummins 6cta 8.3, 450 C also known as Diamond so I,d like to start a new thread for this beautiful engines. I found information in this fantastic page all over, but with this thread I would like to have it all together in one simple thread. Hope you like it and help this thread start going on...

To start I would like to put all the information regarding maintenance,
This is a Marine Maintenance Part List from Cummins engine manuals, I am going to list parts and serial numbers:

Drive belt: 3911587
oil filter: LF 9009
Fuel Filter: FF5285
Air Filter: AH19002
Coolant Filter*: WF2071
Raw Water Impeler: 3897337
Zinc Plug: 68241

Engine rating 450 hp@ 2600rpm fuel pump: 3866799

Oil Engine:
use a high quality Multi-Viscosity SAE 15W40 (Cummins Premium Blue)
in Cold Climates: 10W30

Engine Coolant: use high quality Ethylene Glycol mix in ratio 50/50 water to glycol solution

The oil pan capacity is: 13.2 liters or 14 quarters ( always check level)

Basic engine Data is:
450C rpm 2600 fuel pump Bosch 23.3 fuel consumption

Hi i have just joined good thread,have a 2002 sedan bridge.with these engines ,that have done 1900 hrs,help needed on removing the port engine( to get at leaking port tank)and Zk box. dampers. Can i get the engine out through the saloon door.

 

[Irie308]

Hi i have just joined good thread,have a 2002 sedan bridge.with these engines ,that have done 1900 hrs,help needed on removing the port engine( to get at leaking port tank)and Zk box. dampers. Can i get the engine out through the saloon door.

Welcome aboard! Yes, have a dockmate with an 01 DB who replaced a motor a few years ago. Salon door came off and motor came out pretty easily.

 

[Three Amigos]

great thanks