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"Valve adjustments"

Have a observation/question about when you take your coaches to get a valve adjustment.In the last few months I have checked
valve clearence on 2 coaches,both had 8.3 cummins and not one valve needed adjustment.
If I were paying for this service I would have them tell me which valve were tight or loose or good.
I urge those of you who have this done to ask the mechanic which valves were adjusted and if they were loose or tight.There are
even forms out there to map this out for future reference.Would be interesting to see what the consensus is.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: "Valve adjustments"

Reply #1 –
I have one tight valve on mine at 135k miles. I have the m11 though but I am good to go for a while now at 187k
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: "Valve adjustments"

Reply #2 –
Quote from: John44 –
In the last few months I have checked valve clearence on 2 coaches,both had 8.3 cummins and not one valve needed adjustment.
Just curious - what was the mileage on the two coaches you checked?
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: "Valve adjustments"

Reply #3 –
Mine had 208K but not sure when last checked,the other coach was Mr. cobbs,are you out there Dave.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: "Valve adjustments"

Reply #4 –
  On my 3208T,  I had the valves adjusted and discussed this with the mechanic.  He stated that he wouldn't do just the tight ones or loose ones,  You do them all and get them all at the same spec., or don't bother.  Some may be at the high end and some at the low end, so do them all and get them in the middle of the range as much as possible.  Do it once ----  Do it right  ----  Have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: "Valve adjustments"

Reply #5 –
going to see Bernd in NAC Thursday for a valve Adj. at 120K on my 2000 Cummins ISM. He told me (not saying I have looked it up) that Cummins changed the valve service to 60,000 miles due to low sulfur fuel.

Don't flame me, I am just repeating what he said, I have gone almost exactly 120,000 miles from new (third owner?) in 2000, and my prior information suggests 120,000 for first valve adjustment
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: "Valve adjustments"

Reply #6 –
Quote from: Tim Fiedler –
going to see Bernd in NAC Thursday for a valve Adj. at 120K on my 2000 Cummins ISM. He told me (not saying I have looked it up) that Cummins changed the valve service to 60,000 miles due to low sulfur fuel.

Don't flame me, I am just repeating what he said, I have gone almost exactly 120,000 miles from new (third owner?) in 2000, and my prior information suggests 120,000 for first valve adjustment

Did my m11 at 110k and the engine is noticeably smoother and quieter.  Whatever that means
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: "Valve adjustments"

Reply #7 –
Beau at Bernd's adjusted our valves and fuel injectors when we hit 90K a while back when we were in Nac.  I did not think to ask how much adjustment was needed.  Every valve was adjusted. 

I thought Bernd told me that originally Cummins on the M11 recommended valve adjustment at 120K but changed to 90K based on what Cat recommended.  Not sure though.
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: "Valve adjustments"

Reply #8 –
Quote from: John44 –
Mine had 208K but not sure when last checked,the other coach was Mr. Cobb's, are you out there Dave?

John, you so kindly offered, and then drove over an hour and half each way to me to help me in Port Aransas, last Feb.  Again, much thanks and I still owe you a nice dinner when I get back south.  The coach might have had about 115,???.

The coach is now parked in covered storage some distance away.  We are back in the house, due to Dolly's declining health.
Dave Cobb
Buckhorn Lake Resort The Club, #6202, Kerrville TX
check the map.  I do rent it out when I am traveling!
2001, U320, 36' #5887, in Kerrville, FT Club #17006, (7/23 to present)
2024 Jeep Grand Cherokee L, Summit, white
EX: 98 U295, 36' #5219, (mid door), (4/13-10/23)
EX: 93 U225, 36' (4/11 to 4/13)