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Topic: Temp Gage (Read 613 times) previous topic - next topic

Temp Gage

Is this temp gage 188 or 198?
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Temp Gage

Reply #1 –
I say 188
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Temp Gage

Reply #2 –
To me it appears to be closer to 200 than 190
Peter & Beth Martin
No Forrest? What have you done?
MC# 15890 until Dec 2016; FMCA #F329677
Cincinnati, OH

Re: Temp Gage

Reply #3 –
198, 190 is exactly in the middle between 180 and 200
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Temp Gage

Reply #4 –
Looks like 195 to me.  :dance:
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: Temp Gage

Reply #5 –
ISSPRO.com - Quality Gauges, Tachometers, Speedometers and more!
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Temp Gage

Reply #6 –
Definitely non-linear.  Just a bit under 200° is probably the best you are going to get.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Temp Gage

Reply #7 –
These gauges have terrible tick marks and numbering.  Here's my take on how to read them: 
It's hard to tell but there are thick lined tick marks and thin lined tick marks.  The printed numbers should be associated with the thick lined tick marks. 
It appears then the degrees between all tick marks is (roughly) 25 degrees:
1 thin tick is between 200 and 250;  (250-200)/2= 25 degrees
2 thin ticks between 100 and 180: (180-100)/3 = 26.6 degrees
no thin ticks between 180 and 200; 200-180 = 20 degrees

I was taught in school that (unless indicated otherwise) a gauge should not be considered more accurate than the smallest tick mark.  I think the best one can read into these gauges is:
1.  Needle less than 180 = engine cold
2.  Needle between 180-200 = engine warmed up
3.  Needle above 200 = engine hot

I have found the dash gauge always reads higher than what the VMS tells me, and the higher the temps, the more deviation (up to 15 degrees).
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Temp Gage

Reply #8 –
It is 198 closer to 200 than 188.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30

Re: Temp Gage

Reply #9 –
The gage has always read that. I was just wondering if the number went o the corresponding hash mark or the next one up.
Engine dosnt overheat getting all ready for Sturgis, Woo Hoo!!!
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Temp Gage

Reply #10 –
 VDOsays gauges reading 188 next big mark is 190
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Temp Gage

Reply #11 –
Just for the record my trans temp and water temp are pretty close.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30

Re: Temp Gage

Reply #12 –
It's nothing to worry about. When the needle is halfway between 200 and the next tick mark you need to back off before you overheat. Look at your transmission temperature gauge and your tachometer and you'll see what the problem is. Most of the time when it's about to overheat it's because the torque converter is slipping and making a huge amount of heat. It slips the torque converter more often when using the cruise control. Also it slips the torque converter more often at higher speeds above about 55 miles per hour. Pay close attention to your transmission temperature and your tachometer and you'll learn to identify when the torque converter is slipping. Manually shift into the next lower gear. You may have to slow down before downshifting so you won't over rev the engine. If you're in Arizona in the summer you're gonna need a radiator sprayer. It'll be the best modification you ever make.
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)

Re: Temp Gage

Reply #13 –
Quote from: RRadio –
When the needle is halfway between 200 and the next tick mark you need to back off before you overheat. Look at your transmission temperature gauge and your tachometer and you'll see what the problem is.  If you're in Arizona in the summer you're gonna need a radiator sprayer. It'll be the best modification you ever make.

A sprayer is prolly a good idea if you've got a heavy weight 40 footer. That being said, we just pulled one of the worst climbs in Arizona: I-17 northbound from Phoenix to Flagstaff in 100 + degree temps. Water temp never got over 200, trans & tach were way within specs. She climbed at 45 mph, shifting all the time without me doing anything. I love that Allison! Arizona highways have a warning on climbs; "Turn off air conditioner next six miles to avoid overheating."  ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Temp Gage

Reply #14 –
He's got a Detroit Diesel with a computerized four speed Allison that slips the torque converter rather than downshifting. I presume the computer wants precise control of the rpm or something? This is usually what causes the Detroits to overheat. You've got a completely different setup with a Caterpillar and a six speed. If he tried to climb that same hill with the torque converter slipping he'd overheat and have to slow to a crawl. If he manually downshifts and pays close attention to his transmission temperature he can climb that grade at a reasonable speed... With a radiator sprayer he'd be screaming up over that grade at full throttle all the way... and that's what owning a Detroit is all about :) ...so yeah, a radiator sprayer is the best modification ever
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)

Re: Temp Gage

Reply #15 –
I agree with Scott, have pulled that hill in my eagle and my u300 many times both with Detroit's and a misting system , did all my own down shifting and drove by the tach. Detroit's are a different critter but love the way they scream :))
Andy & Eileen
MONTROSE COLORADO
1992 U300  40' 6V92 TA
2016 4 Runner
1998 Jeep Grand cherokee

1998 Jeep Grand Cherokee) Build # 4135 Skp# 122921
 

Re: Temp Gage

Reply #16 –
...in the campground at Zion NP this spring a guy in a fancy new diesel pusher came over to ask me what engine I had cuz he loved the sound of it :)
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)