| Author |
Message |
Tom Dessert (Mci5er)
Registered Member
Username: Mci5er
Post Number: 32
Registered: 12-2005
Posted From: 216.211.177.226
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 12:20 pm: | |
On the road in Calispell Montana. We left Grants Pass, Oregon 4 days ago with no problems until last night. Our 6v92TA started running hot (above the norm 180 near 200) We've pulled several hard grades with air temps in the upper 90's on this trip without the bus breaking a sweat. Then coming out of St. Regis Montana, the temp started to climb over 180. We pulled over checked belts, coolant levels etc. Everything looked ok. The problem continued even on the flats. We pulled over to cool then run 10 miles then pulled over again. I finally turned on the bus heat to keep her cool enough to get into Mountain Meadow RV, near Glacer Park. I'm thinking the problem is a themostat stuck. But open for any and all comments. Also anyone know of a good shop close to me here.
Thanks |
Chuck Lott (Chuckmc8)
Registered Member
Username: Chuckmc8
Post Number: 166
Registered: 5-2004
Posted From: 66.0.122.34
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 12:39 pm: | |
Tom, do you have a mechanical temp gauge in the engine compartment? If so did you compare the dash gauge readings (electric) with the mechanical gauge?
The mech gauge will be more accurate-
hope this helps- Chuck Lott |
Tom Dessert (Mci5er)
Registered Member
Username: Mci5er
Post Number: 33
Registered: 12-2005
Posted From: 216.211.177.226
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 2:47 pm: | |
Chuck,
Yeah, Checked the mechanical during the cool-down stops and they (between dash and mechanical) read a few degrees different ie, dash 190, mechanical 196. So while driving, I used the dash to gauge stopping points. After the road heat was turned on temp held to 184 for the last thirty miles into Hunger Horse, Montana. I'm guessing there is a cooling problem based on watching the engine temp over the last 800 miles . When I saw it start to climb over 180, that set off my personal alarm.
THanks |
sassbg (Eagleone)
Registered Member
Username: Eagleone
Post Number: 19
Registered: 3-2005
Posted From: 24.255.214.92
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 4:38 pm: | |
Tom could be a head gasket. that will it run hot Biii. |
Jim Stewart (H3jim)
Registered Member
Username: H3jim
Post Number: 248
Registered: 10-2004
Posted From: 68.6.177.90
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 4:39 pm: | |
Does your fan have an electric clutch?
Any change in engine performance that might indicate something else? |
Dallas Farnworth (Dal300)
Registered Member
Username: Dal300
Post Number: 97
Registered: 3-2006
Posted From: 172.144.184.252
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 10, 2006 - 6:21 pm: | |
It could be you are just up in the clouds.
St. Regis is around 7K' and you go up from there.
You are crossing the Great Divide.
Take it a lot slower and a lot easier and enjoy the ride.
There's no Law that says that you have to run as fast as the Brand New Big Trucks with 600HP and radiators to match.
You were probably engineered to do 55 on the flats and drop from there.
Good Luck!
Dallas |
Tom Dessert (Mci5er)
Registered Member
Username: Mci5er
Post Number: 34
Registered: 12-2005
Posted From: 216.211.177.226
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 11, 2006 - 12:26 am: | |
Thanks all for your comments. I've got an appointment tomorrow a.m with Northwest Truck Repair in Calispell, Montana. We'll see what they come up with. Their local rep is good and they are certified Cummings. I talked to the service dept. and they said no problem working on DD 2 strokers. So we'll see.
Thanks All I'll keep you posted. |
Craig (Ceieio)
Registered Member
Username: Ceieio
Post Number: 214
Registered: 12-2004
Posted From: 207.101.213.58
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, July 14, 2006 - 6:01 pm: | |
Tom - you're killing us! Is the bus OK? What did you find?
Craig - MC7 Oregon |
Tom Dessert (Mci5er)
Registered Member
Username: Mci5er
Post Number: 35
Registered: 12-2005
Posted From: 71.80.204.142
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 24, 2006 - 1:15 pm: | |
Sorry for not getting back to ya on the original post, but wifi wasn't readily available or not working most of this trip. Anyway, my visit to Northwest Truck repair worked out great. The guys immediately believe that the overheating problem was due to a slack blower drive belt. I had mentioned on a previous thread that the belt tensioner (air) had been removed and an old car type (adjustable roller) installed in it's place and that the drive was hard-bolted to the shelf. Tom, the head DD mechanic, replaced the drive belt because it was riding to deep in the pulley groove and too narrow. Getting a correct fit with no numbers was a task. The correct one for my unit was 114" long x 3/4 wide. They then installed a second fixed pulley on the right hand side to pickup the slack and minimize the belt slap. They tighten everything up and it really made a difference in the air volumn around the engine and radiators. I drove from Calispell to Deer Lodge that afternoon without any indication of a problem. When, I opened the engine doors to show-off the repair to friends the left-hand tensioner fell out on the ground. It was made of aluminum, and had broken on the old (probably poor quality) welds. To make this long story shorter, I found the best welder/fabricator in town and he built me a new steel tensioner, which came out great. I installed it in about five minutes adjusted the tension and have since driven 1800 miles with this setup without heat issues or problems. |