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  #1  
Old February 14th, 2015, 12:17 AM
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PabloCocito
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Pablo Cocito
1987 Defender Tithonus
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Oil running cold?

So I tried looking around but came up empty..

I have a 110 2.5NA with an oil cooler. I noticed that whenever I'm driving around town the oil temperature never makes it passed 1/5-14th of the way up.. but when I hit the highway for a good 30-40 minutes then the oil sits happy at the middle.

It runs great all the time, no weird noises or anything.

Does the 2.5NA have a oil cooler thermostat? I could only find that the 2.5TD and up came with a oil thermostat.

any help or advice would be appreciated!

Thanks!
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  #2  
Old April 4th, 2015, 12:37 PM
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FirstTithonus
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Dustin
1994 NAS 90 #313
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I'm also interested in this topic. I have the same engine however a slightly different issue. I just replaced the bulbs in the gauges and now the oil temp sits at 3/4-redline. Haven't changed anything else or barely driven it. No other noticeable issues. Did I screw something up back there when I was fidgeting about?

Anyone out there have some advice for Pablo and I?
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  #3  
Old April 4th, 2015, 01:39 PM
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Rick Newman
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If you look at where your oil filter assby is...also where the cool lines hook up, you will see a rather large (the ones I have seen are brass) plug. If you' remove the plug there is a spring and diphram. These parts regulate the pressure and temp. Now mind you, this was on MOD trucks, but wouldn't think it would change much. Personally I removed the cooler and gutted the assby. I have run a 2.5 pretty hard ( VOT 13...4 people/RTT/all our gear) and never had pressure or temp issues.
Even with my "newer" motor running down the freeway for 10 hours there was never any issues.
Hope this gives some onsite.
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  #4  
Old May 15th, 2015, 11:52 AM
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FirstTithonus
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Dustin
1994 NAS 90 #313
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Thanks for the info. It is an exMOD truck. I looked around and it turned out to be the sender unit. All is well in Tithonus land again.
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