6bta5.9 Oil Capacity-gctid356788

[Guest]

This probably falls under the category of a dumb question but...

The Operating Manual for my 6bta5.9M 315hp Cummins says the crancase oil capacity is 15qts. Does the 15 qts include the 1 qt that you pour into the oil filter when changing it? As I said, probably a dumb question but since the manual says the dipsticks are marked by the installer I do not fully trust them. 14 qts poured into the top fill plus the qt in the filter only comes up to slightly above the lower mark on the dipsticks after running the engines.

Second question - what is the no load RPMs for these engines?

Thanks for any help.

Bob

[boatworkfl]

Try this Cummins PDF

http://www.google.com/url?sa=t&rct=j...txambTI2c2HOiA

[Uncle_Bob]

This is the best explanation you will get for oil capacity: http://sbmar.com/main/articles/takin...an_capacities/

[smitty477]

Hello Bob,

You will find some great 1st hand input on these engines and questions at Boatdiesel.com as well as a great vendor at sbmar.com (Tony Athens). There are valuable articles and information at each site but I would start with Tony at sbmar.

Now for less than 1st hand information ---

Oil level varies dependent upon exact amount removed and the angle of the oil pan at installation and boat loading. It is harder to get all of the oil out than most realize and most installs did not have the diptube marked at initial fill.

No load rpm's should be 3,000 or slightly more on a warmed up engine tested brefily and with controlled amp up and down.

Max loaded rpm's should be full rated rpm's plus 3-5% more for a long engine life as a brief test (in your case 2,885-2,940).

Please make sure your tachs are accurate before testing or sweating any of these numbers.

Hope this helps.

[Guest]

Thanks Everyone,

This is exactly the information I need. BTW in answer to the question, I have Aetna digital tachs.

Bob

[Guest]

11.5 Liters whatever that is in your money

[smitty477]

"11.5 Liters whatever that is in your money"

I do not believe that to be a correct value.

Hope this helps

[Guest]

hes an american......my 5.9 takes 11.5 L the money thing was a joke...........Here's your sign:hammer

[smitty477]

"hes an american......my 5.9 takes 11.5 L"

That would be in certain year trucks I believe.

Do not want the OP to get bad data and inadvertently cause damage to engines.

Hope this helps

[Guest]

I was also told, and have read in Tony's recommendations, to run under the full mark, rather than right on it. He suggests in between the low and full mark, which is one quart under the recommended input.

Cheers

[Guest]

smitty477 wrote:
"hes an american......my 5.9 takes 11.5 L"

That would be in certain year trucks I believe.

Do not want the OP to get bad data and inadvertently cause damage to engines.

Hope this helps

your joking right? the 5.9 is virtually an unchanged BLOCK

[kwb]

Ofishal wrote:
your joking right? the 5.9 is virtually an unchanged BLOCK

Last time I checked an engines oil capacity was more a function of the pan that was installed on it than the block.

There are lots of pans that can be installed on the 5.9 BLOCK. Your recomendation of 12.2quarts is about 3quarts short of what others have posted.

Most marine pans are a lower profile pan but because of duty cycle will often be a fairly high volume compared to the typical range of volumes used on that engine.

[smitty477]

"your joking right? the 5.9 is virtually an unchanged BLOCK"

The blocks are mostly unchanged the pans and full oils sytems vary by year and intended use, marine is certainly different.

I am not that familiar with this CPL in the 39 Bayliner given its year and angle of the pan so the best advice was to seek more information from Tony at Sbmar.com. We have been more familiar with these Cummins engines in both Sea Rays and 47 Bayliners where these are the typical oil volumes applicable for them:

Low 13 US qts (13.75 ltr)

High 15 US qts (15.85 ltr)

Usually on these boats it is best to run with a level at or around 13.5-14 US qts to avoid the possiblility of excessive oil whipping which these engines are prone to.

Running at 12 qts (11.5 ltr) is at the edge of where problems will occurr depending upon engine angle in the boat and at time of cruise.

It is best for 39 owners to read and consult Tony's website and /or boatdiesel.com with their engine specs in hand.

Hope this helps

[The_Other_Gary]

My 5.9 tkes 15 quarts inc filter to the full line.

My add oil mark is at 13 quarts.

I never put in more than 14 quarts and like it halfway between full and add.

at a full 15 quarts I get oil splashing into the crankcase breather.

[MerlinV]

Here is the link to Tony Athens' commentary on oil pan capacities;

http://www.sbmar.com/Maintenance/PDF...Dip-Sticks.pdf