beschmidtke

We are just on our way back from CO and experienced blow by again on my second stage exhaust brake. It is two stages with a three position toggle switch. I do have an ISC 350. The second stage exhaust brake is very aggressive. It will downshift with the RPMs going up to 2,400. I think 2,600 is the limit on down shifting. I try to keep it at 2,000 or lower. I had to use it on I70 heading East into Denver and I got blow by. First stage exhaust brake never gives me problems on RPM or oil. 2nd stage is nice to have in the mountains.

Thank you for the replies. The tires are 18 months old and with highway tread. When I had them checked all pressures were set to 120.

I have a 40' Intrigue with new Toyo tires. We are experiencing a noise from the rear of the coach that is first noticeable at 50 MPH and becomes louder from there. It does not change with engine RPM. The coach has been checked for motor mounts, drive line/u-joints, bearings, and exhaust. The final opinion of Cummins and a local commercial tire company is that there must be an issue with the rear tires, although they could not find any evidence of tire separation. Has anyone experienced such noise and solved it with new tires? The noise is similar to driving on a rough concrete highway. I am interested in other opinions before I spend $4k on rear tires.

We have a 2017 Acadia front wheel drive. Roadmaster installed the system for us and we are happy with it. The tow bar stays on the motorhome when disconnected from the car. We are adding brake control before this summer and we are looking at the Air Force One controller that is installed permanently in the car and controlled by the air from the coach. Roadmaster also has their own electric permanently installed system. The car was wired so the vehicle lights operate while plugged into the coach and the car battery is also slowly changed. Install the grommet in the shift boot. It will make prepping the car to tow much easier and not potentially scratch up the console if you have to remove the boot each time. Bill

My coach is a 2001 Country Coach Intrigue 40'. You are correct, it is a two stage exhaust brake with a switch to choose which stage you want to use. When I only use the low stage exhaust brake, I get no blow by. Second stage makes a considerable mess. I will be looking at the catch for the slobber tube. When I purchased it a year ago, we experienced no blow by on second stage. It began after Cummins replaced our dipstick and did an oil change. Cummins could not tell me for sure if they filled the spec 20 quarts, or kept filling to the full line on the uncalibrated dip stick. It is going back in for that to happen. Thank you for you responses.

Thanks for the responses. I did confirm the oil is from the slobber tube. Country Coach did let me know that if the oil is full, the compression brake could cause blow by. When Cummins installed the new dipstick tube and air pan seals, they did not calibrate the dip stick. I ran on low stage compression brake on a trip back from the Oregon coast and pulled a 1,000' pass with no new blow by. I just hate showing up at a park with oil dripping off my rock guard and all over our TOAD. Luckily I have a side radiator that stays fairly clean.

I am experiencing oil blow by with our Cummins ISC 350. This appears to be only happening while using the high stage compression brake. I try to keep the oil low by 2 quarts, but with a new dip stick that has not been calibrated, not really sure where I am at. Has anyone added a CCV to an ISC engine that was built prior to 2007 to help eliminate this problem?

I have a 2017 Acadia set up to dinghy tow. I was surprised it was so easy to tow. No fuses to pull. We had to install a grommet in the shift boot to allow easy access to insert a rod to press the shifter release. Once you do that while the car is shut off and shift to neutral, it is ready to tow. If you do not install a grommet, you would have to pop off the shifter boot each time. Our Acadia was the first out of Roadmaster for the 2017 model year and they confirmed this is proper for flat towing.

Thanks for the response. I will probably have to call GM. I have contacted Road Master and our Acadia will be the first 2017 for them to work on, so they also didn't have experience with the new model. It is not convenient to have to pull the shifter boot to manually shift the vehicle to neutral. Hopefully that is not the case. Bill

I just purchased a 2017 Acadia and have found very little information on dingy towing the vehicle. The manual only states to remove the shifter boot and manually release the shifter into neutral. No mention of unlocking the steering or if it is necessary to remove fuses. Does anyone have experience towing the new Acadia?