203* T-Stat??
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
I was seeing up to 227*+ with the 203* stat. Now, it's ~220* after a hard run. Averaging around no more than 200* normally.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Wow! I haven't seen mine over the 'stat temp. Even in the summer when it was over 100 degrees. Are you talking about temps read by the PCM/AE or from somewhere else?
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
I consistently see oil temps 20-30*above water temp when the engine is actually working (towing), it remains close to water temp running empty.
The default programming is to assume oil temp of 212*f under operating conditions if the sensor is out of range.
The default programming is to assume oil temp of 212*f under operating conditions if the sensor is out of range.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Some of the higher end VW/Audis have factory installed engine oil temp gauges.
I've personally owned three of them over the years.
Even in the dead of winter the EOT runs 210-230 depending on engine load.
Going over a mountain pass will always warm up the oil.
Just cruising the interstate will put it at around 220.
I've tried installing a cooler thermostat on one of them and it made no difference, which was very surprising to me.
I've personally owned three of them over the years.
Even in the dead of winter the EOT runs 210-230 depending on engine load.
Going over a mountain pass will always warm up the oil.
Just cruising the interstate will put it at around 220.
I've tried installing a cooler thermostat on one of them and it made no difference, which was very surprising to me.
still plays with trucks
Joined: Mar 2004
Posts: 1,743
Likes: 3
From: Twin Falls Idaho
Dan, that makes sense if you think about it. once the T/stat is open, it doesn't matter what temp its set for, its open. a 175 is just as open as a 200. the set temp only controls the opening or warm up temps. If I remember right the 192 t/stat begins to open around 175, the 203 opens around 185. it shouldn't affect the operating temp once either one of them is open.
this of course is just my limited opinion
Barney
this of course is just my limited opinion
Barney
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
The last time I was down in Holtville at JW's place, he told me he'd done some comparison testing on the 203 versus the 195 thermo's, and the 203's caused higher than desireable engine oil temps.
Stewart
Stewart
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
No 203* T-Stat for me! In addition to that, big oil trucks tend to run a little hotter oil temps to begin with.
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Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
So what are desirable oil temperatures, and what's too hot?
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
Oil temps should be very close to your coolant temps.. Oil should be running 195-200*.
I was seeing 240* temps just driving unloaded!
I was seeing 240* temps just driving unloaded!
Posting Guru
Joined: May 2007
Posts: 1,141
Likes: 0
I have been running the 203 for years, no problems, i also run Evans with no pressure, theres a big difference between Evans and antifreeze. With the cooling system on these trucks that hold 8 gallons the 203 stat is no problem. JMOP.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Do you watch you Engine Oil Temps?
Post Fiend
Joined: Feb 2008
Posts: 10,977
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From: Lancaster, Pa.
Don't know if I mentioned it earlier in the thread but I got my oil reading temps from my trip cluster test, said it was 233* running normal. Might take mine out and do the stove top water test, curious now.
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
You could also get a thermal temp gun and shoot the resivour to see if it matches your EOT sensor's reading on the AE