mandms59

Great news Scotty.... all the best to Debbie.

Walter, I will take it. I sent you a PM. R/ Mark

All, Follow-Up/update to the Oil blow back issue. I ended up being able to get into Cummings in Boise this last Monday. They completed the routine Generator and Chassis service on the Coach (and gives me a baseline on oil - meaning my oil level should now be at correct level; have noted where that is on dipstick for future reference). I asked service manager to replace the crankcase breather element filter as I had no record of it being completed previously by other owners - and check/replace overflow tube for as I could not find it. I mentioned my issue about spitting oil back out oil filler tube, he said that could happen with a restricted crankcase filter/element. The crankcase breather element was very dirty per tech who worked on MH. I also learned on my ISL400 there is no exterior breather tube - he explained the routing is internal back to crankcase/oil pan to meet EPA changes in mid 2000's .... hence my inability to find the dang tube when searching for it. We only had a short drive to our next stop; everything seems fine so far - will know more next week when we have a longer drive to next stop including a few medium grades. Again thanks to all here for their inputs. V/r Mark

All, We have been in an area with little to no cell reception for our hotspot the last few days. Thank you for the comments/education and suggestions. Lou - thanks for input, as we are F/T on the road unfortunately there is not an easy option for draining & refilling oil - hence I end up bringing into a shop to complete the scheduled service fluid change work. As many have stated (Rick A /Ray /Ivan)... I now wonder if my dipstick markings are off far enough that I am exacerbating one simple issue crankcase breather filter/tube with oil quantity/pressure situation by overfilling to get within marks. Current plan is to bring it to Cummins as it is in window for Chassis and Generator service that I was planning on in the next month. I will have them replace crankcase filter/check overflow tube - as I do not have a record of this being done from previous two owners( very limited record keeping). This will at least give me a grounded starting point to go forward with known oil level and that crankcase breather filter/tube is in working order. As I still have limited connection... will read through everyone's posts above again and make sure not missing something else above. Will provide an update once services are completed above. R/ Mark

I forgot to add that on our short travel yesterday ... PSI stayed in normal ranges until about 5 miles out from our stop -- while idling at a flagger checkpoint the Idle PSI went down to 20 PSI; that got me nervous as I have never seen it that low. When we got to campground I checked oil dipstick and thought it was 1-2 quarts low on stick so I added 2 quarts to bring it up to within range last night. Then this morning started it up and got 65 PSI.... If I did overfill it - take it the simplest way would be to try and drain out some oil from drain plug without making a big mess in campground.

UPDATE - I added about 2.0 qts of oil which based on dipstick markings. I am now getting 65 PSI at idle & rises to above 75 psi if I bring revs up to 1200... so I am estimating that the blowout was more than what oil I saw on the car. And that the system is not able to regulate below 75 as Rick A mentioned below and confirmed in Cummins manual... This leads me to believe that it is much more severe problem ($$$) than clogged breather tube - which I was not able to find looking thru engine hatch above or underneath; maybe not looking for correct item.... Easily found Oil filter and can trace return line from Turbo charger to crankcase... but did not find anything else from crankcase on either side... We are about two hrs away from Spokane Cummins dealer... Guessing that is my best option to bring it to for further checkout/diagnosis - compression check?? Has anyone dealt with them or recommend another shop in area... we are currently about 35 miles south of Lewiston ID at state park campground. Recommendations/suggestions/guidance greatly Appreciated R/ Mark

Oil pressure has been consistent in mid 50's even with the blow back issue the past 1 1/2 days. I have not been a hawk on watching pressure during descents/exh brake usage to see if it rises appreciably; but will do so when we depart tomorrow. I will have to check the dipstick again tomorrow when I am off the jacks to get accurate reading; After the first day I thought it was sitting at same level as before (about 1-2 quarts low)but it is tough to tell on that stick as Ray mentioned above. There have been no unusual noises, out of ordinary readings on gauges or Aladdin Monitoring page during those instances. We are coming up on our oil and fluid filters replacement/maintenance here shortly -as we full time was planning to have done at the Cummins Service Center in Boise ID next week. Should I be inquiring about cylinder compression test? Does anyone have any other T/S items I could tackle on my own? Could a clogged/restricted crankcase breather filter/tube contribute to problem? I am 3rd owner of coach so no complete records from previous owners... and do not believe it has ever been replaced we are at 87K on engine.

All, This just started 2 days ago on our trip. Yesterday halfway along our route we pulled over by a nice lake in SW WA after coming over White Pass. When I went back to check out the TOAD I noted the right side had some oil splatter marks. I opened up the access panel on back of our 07 Diplomat and noted that there was oil streaked on the cover and side walls plus the dip stick and Oil filler tube. Thinking I had not re-seated the dipstick completely that morning after checking oil & thought it may have come from that location blowing out small amounts of oil in compartment - I re-seated dip stick it cleaned off everything in the compartment dipstick/oil fill tube/Air Filter sensor.... and continued on to the final destination. I did not see any more splatter on car once we arrived... so figured problem was solved. Today we drove straight through to our next stay. When I got here and went back to unhook car... well there was more spray on car's right side than yesterday. Opened up the right access panel and could see that there was a couple drips coming from the bottom of the oil fill tube where extension tube slides in and out ( forgot to take photo at that time) ... I wiped off a few areas so I could see if the was a hole somewhere in the fill tube or connection points (nothing I could readily see). At this point not sure if it is intermittent problem (e.g. under higher pressure loads climbing over the med uphill grades that some oil residue is being pushed out of fill tube seal area and then dripping down to mudflap where the wind catches it and then gets flung onto right side of car) Or is this indicative of a larger issue - something bigger than fill tube seal leak ??? Has anyone run into this problem? Is there an easy fix - e.g. is the copper/rubber ring around extension tube replaceable? Part number? I attached a compiled photo markup sheet for reference. we are not traveling again until 26th; so other than starting engine and have wife increase throttle while I stand in back to see if I see anything leaking... next test would be Monday's trip south into ID. I was going to wrap filler tube at junction point with duct tape to see if I could isolate it that way.... Thanks in advance for recommendations/fixes further T/S ideas. R/ Mark

Glenn, we are on a timeline due to reservation availability in CO & NM in Sept. we are staying at USAFA Family camp for 14 days and will be taking a few day trips to include Garden of the Gods/ Royal Gorge railway trip ( Was happy to see Ray Davis endorse the ride above) and a few other biking excursions while there. We will keep your trip routing highlights/suggestions handy for our next stop through as we have friends in Denver area we visit (Lived in Arvada for 2 yrs before I retired from construction management and we started FT in Mar 2020). R/ Mark

All Thank you for the feedback. We will plan on that route and see how the driver and our 400 ISL does with the passes.... R/mark

Hello, We are looking to add a trip leg out to Mesa Verde NP in Colorado on our travels southbound (Plan to stay at RV park just outside entrance). Looking for input from people who have traveled CO 160 West from I-25 junction to Cortez, CO. We will be leaving Colorado Springs prior to this leg in late September. From my research it looks like 3 passes to go over to get to Cortez, with Wolf Creek being highest. I have traveled over quite few 5K passes in the Diplomat but nothing in the 10K range before. For those that traveled this route: (1) Were you towing (We have our 2016 Crosstrek TOAD)? Or did you disconnect and travel separately over the passes? (2) Is the scenery worth the drive on this route? (3) Is there another recommended route in this area (Down thru NM?) Thanks for your inputs R/Mark

All, Found correct fuse this morning. It was in FRB C409 F58 - SERV LT/AUX 12V PWR. replaced and verified operations. R/ Mark

We bought the following off amazon as our upgrade: https://www.amazon.com/dp/B087F5NLTT/ref=dp_iou_view_product?ie=UTF8&psc=1 They twist lock into place... in the short amount of time we have had them they have been a great improvement to existing cup holders on our 07 Diplomat.

I am trying to find location of fuse for the two 12V power receptacles on dash next to A/C control unit. Think I inadvertently blew fuse when testing install of replacement USB receptacle. I thought it would be on the Front Run bay panel - thinking it would be F29 accessory ... fuse was good. I pulled up 2006 Diplomat Wiring Diagram book and traced it to panel/combo plug C333... but cannot find that corresponding # in Front Run Bay or any other reference I have on-hand- though maybe I am reading the DWG incorrectly (attached excerpt (pg 46 of 50 in book or Pg 3 of Radio Panel Diagram - States Endeavor 05 in title block but part of 06 Diplomat book). I have gone thru the 12V Front Distribution Wiring Diagram trying to correlate information to no avail. Is there another location I should be looking in? Thanks for any assistance/guidance. R/ Mark

Dick.... thanks for suggestion. Will look into this option. R/Mark