High oil temp

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  • pa_dirt
    Senior Member
    • May 2007
    • 259

    #1

    High oil temp

    What causes high oil temp? Water temp and oil pressure seem to be running in the normal range.
  • Jking24
    Senior Member
    • Oct 2017
    • 1519

    #2
    Need a little more info. What are you considering high? Wet sump/ dry sump. Two barrel / four barrel. New combo old combo? Track conditions etc...

    Comment

    • pa_dirt
      Senior Member
      • May 2007
      • 259

      #3
      Wet sump.. 4 barrel ... fresh engine... slick track... engine actually seems to run well just concerned about the 290° oil temp

      Comment

      • Krooser
        Senior Member
        • Nov 2012
        • 3117

        #4
        Tight bearing clearances, a spun bearing, plugged oil cooler or oil line that's plugged or crimped.... you need to pull the pan to look.
        Member of the Luxemburg Speedway Hall of Fame
        Class of 2019

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        • RaceEngineer
          Senior Member
          • Oct 2018
          • 482

          #5
          Originally posted by Krooser View Post
          Tight bearing clearances, a spun bearing, plugged oil cooler or oil line that's plugged or crimped.... you need to pull the pan to look.
          Yup. High oil temps indicate oil in shear. Pressure too high or some kind of restriction somewhere.

          Comment

          • SLM98
            Senior Member
            • Sep 2009
            • 407

            #6
            No matter what your engine is wetsump or drysump you need a oil cooler.Fastest way to kill your engine is not controlling temps. I have used mainly a Setrab 640 cooler will get your oil temps down into the 220-230 range.

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            • pa_dirt
              Senior Member
              • May 2007
              • 259

              #7
              Thats the problem.. it’s that hot with a cooler in it... we could move the prob and probably get it to read a bit lower but that doesn’t change the fact of how hot it is in the engine

              Comment

              • JustAddDirt
                Senior Member
                • May 2007
                • 1893

                #8
                abnormally high oil pressure will cause it.
                as well as running to thick of oil
                what is your oil pressure at WOT
                What weight oil you using?
                Where are your reading your temp from, pan or oil cooler?
                where is your oil cooler located? Does it have a good clean cool air source?

                I have often thought mounting in front of radiator would be best, use the fan suction to pull air through. Deck mounted coolers just do not have a lot of airflow in the direction they are mounted. more like a heat-sink than a cooler.
                Also thought of mounting an electric fan to pull air down through cooler like I have on a buddy's pure stock Trans cooler.
                Last edited by JustAddDirt; 05-28-2019, 08:47 AM.
                I think there should be lifeguards in the genepool.

                Comment

                • billetbirdcage
                  Senior Member
                  • May 2007
                  • 2020

                  #9
                  Originally posted by JustAddDirt View Post
                  abnormally high oil pressure will cause it.
                  as well as running to thick of oil
                  what is your oil pressure at WOT
                  What weight oil you using?
                  Where are your reading your temp from, pan or oil cooler?
                  where is your oil cooler located? Does it have a good clean cool air source?

                  I have often thought mounting in front of radiator would be best, use the fan suction to pull air through. Deck mounted coolers just do not have a lot of airflow in the direction they are mounted. more like a heat-sink than a cooler.
                  Also thought of mounting an electric fan to pull air down through cooler like I have on a buddy's pure stock Trans cooler.
                  covered a lot of it^

                  Adding:
                  1. Too much oil in oil pan (overfilled) will also increase oil temp as the crank is whipping thru the oil and heating it just like pumping it over and over will heat oil.

                  2. Too much oil pump and pump is bypassing a ton of oil to keep pressure down to where it's regulated at. Or too thick of oil for pump and bearing clearance combo and causes pump to bypass a lot of oil.

                  Comment

                  • CCHIEF
                    Senior Member
                    • Jul 2014
                    • 399

                    #10
                    Crate motor?

                    Comment

                    • SLM98
                      Senior Member
                      • Sep 2009
                      • 407

                      #11
                      What u got for a cooler?

                      Comment

                      • perfconn
                        Senior Member
                        • May 2007
                        • 3636

                        #12
                        Big race tracks(1/2) mile,wetsump,too much timing,carburetor too lean will all cause high oil temps.I have seen guys put tape over the oil temp guage so they didn't know what it was.You may or may not have a problem.Hammer down on a big track will see 290*

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