Cummins 450c Marine Owners Manual

24.08.2018admin0 Comments
Cummins 450c Marine Owners Manual Rating: 7,1/10 7265reviews

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You are not going to like my post——————————————–673 hours over 16 yrs and this is what you have? This IS NOT a Marine Age issue, this is a 100% installation issue related to both the exhaust design and your engine room design. For 100% sure, your exhaust design is allowing salt water to get into your turbos and the air intake is sucking in salt water or?? What do you do right now? Stand back a few feet and take not less that 15 GOOD pictures of your engine room from all around showing EVERYTHING. All angles and all perspectivesYou have major issues that need to dealt with.

Cummins 450c Marine Owners Manual

What about the things that are 100% affected by Marine Age and not engine hours? Aftercoolers, and everything else that is part of the entire seawater system? Just curious–Did you hire a surveyor before you bought the boat? Post your pics here and send them to me direct in high resolution.

Kevin, I tried to digest what you have posted this is what I “see”, and will comment on. 1) Let’s compare the external pics on the Port & Starboard Turbos–You have plenty of pics to show what needs to be “SEEN” 2) Let’s compare in INLET of the both the P& S turbos 3) You did not post a pic of the exhaust outlet of the STB Turbo, but the port side tells the story and that is without question ( at least on that side). Then ask yourself why the riser replacement at such low hours– Maybe all of this is from before?

The port air intake side is eating or has eater in the past saltwater thru the intake/Airsep– You see it inside and externally–Where it did or is coming from? I Don’t know, but that is also without question. At sometime in the past (or still maybe now?), the exhaust riser was allowing saltwater back into the turbo.

That is without question. If it was me, I’d be removing the turbo and have in gone thru– I have see way worse and probably with a good bead blast of the inner housing, it could be reused. Then after the next season, remove the elbow and look again–You should only see soft black velvet carbon–Nothing else, You should not see that external damage on the port turbo not the rust inside the air intake– So you need to sure something is not spraying that area ( air vents???) The STB side is also “breathing some salt mist, but not terrible. Because you have Airseps ( a CCV system) actually you should not see and rust even on the fan nut as even a very small amount oil mist usually stops that. Maybe the overall design on the the room venting allow spray into the engine room?

Anyway, you have some work to do this winter. Tony, The air inlets run the length of the engine room but is blocked by the two 100 gallon water tanks.

The rust on the outside of the turbos I think is from the prior owner. Before I bought the boat the drippless was replaced on both shafts. 2009 Bmw X3 Service Manual. I think it was spray from the shafts that caused the rust on the outside of the turbos. I did have pics of the old risers that I replaced.

The company that rebuilt the risers was the original manufacturer of the part. They stated to me they rebuilt them to the latest revision. That leads me to believe that there might have been a defect in the original design.

From your answer I surmise that I should send the turbos out to be rebuilt. Can you recommend a Turbo re-builder preferably in the NYS tri state area? Winchester Model 50 12 Gauge Manual. Or one that I can mail the turbos to be rebuilt.

Cummins 450c Marine Owners Manual

Thanks for your input on this. Tony, The air inlets run the length of the engine room but is blocked by the two 100 gallon water tanks. The rust on the outside of the turbos I think is from the prior owner. Before I bought the boat the drippless was replaced on both shafts. I think it was spray from the shafts that caused the rust on the outside of the turbos. I did have pics of the old risers that I replaced. The company that rebuilt the risers was the original manufacturer of the part.

Cummins 450c Marine Owners ManualCummins 450c Marine Owners Manual

They stated to me they rebuilt them to the latest revision. That leads me to believe that there might have been a defect in the original design. From your answer I surmise that I should send the turbos out to be rebuilt.

Can you recommend a Turbo re-builder preferably in the NYS tri state area? Or one that I can mail the turbos to be rebuilt. Thanks for your input on this One last question, If I rebuild them would I see a big difference in performance? Could these turbos be a little low on boost and therefore also be causing a sooting condition on the back of the boat?

Turbo rebuild: No I do not expect you to see any increase in overall performance having “that turbo” rebuilt. I cannot comment on the other one as I have not seen it “inside”. Why the rebuild?