Community Forums

PapaDon · 04-21-2018, 12:35 AM

On our first long distance with HR and toad. Oil sprayed all over the toad and the engine compartment. Used 1 gallon of oil in 4000 miles. Replaced the oil filter as it seemed to be coming from that area. Cleaned the oil mess up. Drove 120 miles (w/o the toad) and same problem occurred. Oil all over in the area of the new filter. I am in the mountains of AZ and I am utilizing the engine brake continously. Am I getting back pressure/blow by through this down tube (drain) on my 2000 HR Imperial ISC 350 cummins with Turbo?
I cleaned (power washed) everything again and will test drive for 10 miles and then inspect. All 10 miles will be through winding 15 to 25 MPH mountain roads. I expect to use the engine brake during that test. Any recommendations as to the cause and what to look for will be appreciated.
Thanks for being here.

slowmachine · 04-21-2018, 03:38 AM

When I see this, my first suspicion is that there is too much oil in the engine. Steep hills make it worse.

RamiDav · 04-21-2018, 07:42 AM

I agree , you probably have to much oil .

This has come up before where the dip stick is not calibrated correctly
and to much oil is put in .

The published oil capacity is often wrong because it is for a dry engine
or an engine with a different oil pan .
After the engine is put in service it will never be completely empty
of oil again , maybe as much as a gal will remain inside .

When the engine has to much oil it will burp that excess out of the
crankcase vent tube ( aka slobber tube )

Hopefully some owners with the same engine will chime in with how
much oil they put in when changing .
Then I think you will need to have another oil change and be sure the
correct amount of oil is put in .
Before starting or let the engine sit for an hour or more check the dip stick
if it very far from correct take file and make a scratch mark on it , that
will be your new full mark .

Ray

jimmy braden · 04-21-2018, 07:50 AM

And some ISCs tend to have a preferred level that is slightly lower than FULL on dipstick. Some will always end up about .5 down soon after topping off. Make sure your slobber tube goes down close to the roadway.

MSHappyCampers · 04-21-2018, 08:57 AM

Hi !

Welcome to IRV2! We're sure glad you joined the gang!

I would be looking for a Cummins service facility!

Good luck, happy trails, and God bless!

Mr_D · 04-21-2018, 09:04 AM

I found on my '02 DSDP the oil level liked to be midway between the high and add marks. If higher it threw it out till it got lower.
BTW the ISC has an exhaust brake, not an engine (compression) brake.

Cooperhawk · 04-21-2018, 09:06 AM

I extended our slobber tube with rubber hose and a stainless steel exhaust pipe to behind the bumper of the coach. It also deflects downward.

Your oil filter bracket could also be cracked.

Also try running with the oil a little low. Just watch the oil pressure.

PapaDon · 04-21-2018, 01:25 PM

Thank you to all who replied. Very helpful in so far as correct diagnosis. Come to think of it, the first part of the trip was southbound towards Texas from Michigan and we had not had an "excessive" amount, but some speckles of oil on the rear of the MH and the toad.
After the mountains, the oil splatter problem became excessive and that is when I added a gallon of oil to bring it back to full. Problem at that point got worse. Installed new filter at service facility. They never mentioned that it might be overfill.
I now know that this forum will be my "first go to" resource. I will report back on my test drive. Thanks so much for all your input.