200tdi average running temp - Defender Source
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  #1  
Old March 11th, 2016, 07:30 PM
burlsube
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200tdi average running temp

I recently installed a VDO temp gauge and my perception is that the temp is higher that the original gauge. I'm trying to figure out if I'm running warm or I'm in the ball park.

The engine is Defender tdi using the VDO sender.

For instance, tonight the ambient temp is 45 and on a 15 min trip on the highway at 65-70 I am hovering around 180-190. On back roads I'm around 140-160. Even in the winter temps around 20 or 30 I could easily get to 160.

Ever since my RRC overheated years ago I am very cautious.
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  #2  
Old March 11th, 2016, 08:17 PM
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That's about where mine runs
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  #3  
Old March 11th, 2016, 08:26 PM
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They have a 190 degree thermostat. That is when it should open. It should run a bit below that. Any lower than 180 and the thermostat is leaking. More than 195 and there is a cooling issue.
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  #4  
Old March 11th, 2016, 09:17 PM
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Just did a vdo sender and gauge - sender installed in the stat housing- and I'm seeing a steady 180-185.
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  #5  
Old March 11th, 2016, 09:34 PM
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Thanks seems like it is right where it should be then.
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Old March 11th, 2016, 10:44 PM
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Quote:
Originally Posted by burlsube View Post
I recently installed a VDO temp gauge and my perception is that the temp is higher that the original gauge. I'm trying to figure out if I'm running warm or I'm in the ball park.

The engine is Defender tdi using the VDO sender.

For instance, tonight the ambient temp is 45 and on a 15 min trip on the highway at 65-70 I am hovering around 180-190. On back roads I'm around 140-160. Even in the winter temps around 20 or 30 I could easily get to 160.

Ever since my RRC overheated years ago I am very cautious.
your thermostat doesn't open till 180 or 190 depending on which you have. Below that coolant isn't even circulating through the radiator
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  #7  
Old March 12th, 2016, 12:52 AM
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Mine was over fueled and used to run hot all the time (I've backed the max fuel screw out 2.5 turns) and now on a 55F day I run 140-160 on the freeway. I did put in a 82C t stat as we have some big hills and hot days here in CA and it helps keep the engine temps below 205F while climbing. I do have AC.
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  #8  
Old May 26th, 2016, 09:47 PM
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What the consensus on what is too hot? For example, we have a few 90 deg days this week and I've noticed it creep to 200 ish for a few mins on the highway before dropping back down to 190 when the thermostat and fan kick in.
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Old May 26th, 2016, 10:45 PM
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Mine sits at 70c no matter what. That's with a full width ac condenser and an intercooler in front of the radiator and only a small 11 inch electric fan
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  #10  
Old May 26th, 2016, 10:53 PM
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200 should be fine.

70 C means the thermostat is leaking.
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Old May 26th, 2016, 11:04 PM
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If I'm cruising at 65-70 I stay mostly at 192 with 195 popping up every now and then. Today I was in traffic all day and it stayed at 185. I have an E fan (set to come on at 195ish) and otherwise stock cooling system.
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Old May 26th, 2016, 11:06 PM
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that, or his engine is underfueled and isn't burning enough fuel to get up to temperature.

more on that later

Quote:
Originally Posted by Red90 View Post
200 should be fine.

70 C means the thermostat is leaking.
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  #13  
Old May 27th, 2016, 09:26 PM
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Thanks this has been a great post.

Today I put the 200 to a new test. 95 ambient temps and bumper to bumper traffic for over an hour. When I reached HH I checked the therm housing with an IR gun. Temp 190. On the way home with no traffic and moving at about 65mph for about 25 mins. Temp 190. Very noticeable that in the hotter afternoon temps acceleration was more sluggish.
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  #14  
Old May 27th, 2016, 09:55 PM
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Quote:
Originally Posted by 1of40 View Post
Thanks this has been a great post.

Today I put the 200 to a new test. 95 ambient temps and bumper to bumper traffic for over an hour. When I reached HH I checked the therm housing with an IR gun. Temp 190. On the way home with no traffic and moving at about 65mph for about 25 mins. Temp 190. Very noticeable that in the hotter afternoon temps acceleration was more sluggish.
Did you hear your fan cycling in the afternoon?
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Old May 27th, 2016, 09:59 PM
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Quote:
Originally Posted by steinhnj View Post
Did you hear your fan cycling in the afternoon?
Cant hear it from inside the truck. I have to get out and put my ear up to the front grill.
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Old May 27th, 2016, 10:51 PM
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Thanks for all the replies. Has anyone validated the hash marks on the VDO 310 105 from between 180-220? I am assuming it is 180-190-200-212-225-250
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  #17  
Old May 27th, 2016, 10:53 PM
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190-200-210 is how I have been interpreting it.
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  #18  
Old May 28th, 2016, 01:08 AM
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I had to run a heavier wire from the VDO sender and a dedicated ground wire from the VDO gauge to get it to read very close to the temp that my IR gun (-+2F) readings were showing at the sensor housing. I have built hotter T-stats trying to get my 300tdi to run warmer and cleaner. I'm currently running a 203F T-stat and it stays just below 200 most of the time.
The factory 192F T-stats tend to run 10F colder than they are rated to perform.
Do you know modern Ford diesels run a 215F stock T-stat? Hotter = cleaner burn.

Just had my annual Opacity test (smog) last week and my engine ran a 0.2%, the state allows me to blow up to 40%.
My opacity is cleaner than most modern high pressure diesels, and my mpg is 23 with a Zf 4HP22
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  #19  
Old May 28th, 2016, 05:47 AM
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Quote:
Originally Posted by Viton View Post
I had to run a heavier wire from the VDO sender and a dedicated ground wire from the VDO gauge to get it to read very close to the temp that my IR gun (-+2F) readings were showing at the sensor housing. I have built hotter T-stats trying to get my 300tdi to run warmer and cleaner. I'm currently running a 203F T-stat and it stays just below 200 most of the time. The factory 192F T-stats tend to run 10F colder than they are rated to perform. Do you know modern Ford diesels run a 215F stock T-stat? Hotter = cleaner burn. Just had my annual Opacity test (smog) last week and my engine ran a 0.2%, the state allows me to blow up to 40%. My opacity is cleaner than most modern high pressure diesels, and my mpg is 23 with a Zf 4HP22
Makes sense. I'm still figuring out the misc balances of a tdi. Do higher engine temps correlate to higher/deadly egts?
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  #20  
Old May 28th, 2016, 06:07 AM
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When I'm driving on the level with no headwind at ~65mph, my EGT's run about 600-800F. And this is in the mountainous west at about 4500' elevation. Uncle Douglas here will tell you mine are higher than living in the lower elevations of the east or mid-west. My EGT's in the worst conditions run 1150F.

Also remember we're only talking about running the engine at about 200F.
If I were to see it getting up over the 210 mark, I'd cut my speed & turn the interior heater on.
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