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Does mixture directly affect temp gauge? 140-160 1974

posted by  uniberp on  Fri May 27 08:54 CST 2005
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last visit: Mon Jan 31 07:08 CST 2011
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Would adjusting the CO on a k-jet change the temperature gauge reading? It sems when I lean it 1/8th it gets a bit hotter.

I have a new engine and it runs a bit hot, at the top of the green on the temp gauge. I figured it might run a bit hotter since it has tight bearings and rings and such, and I will flush the radiator tonight, and swap the radiator if that makes no difference.

I think also maybe the heater hoses are pinched a little, and left a bubble in the head.


--
MPergiel, Elmhurst, IL '74 145e T-5 'Orange Alert'








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    Does mixture directly affect temp gauge? 140-160 1974

    posted by  Volvox1 on  Sun May 29 03:30 CST 2005
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    last visit: Sun Dec 27 15:25 CST 2009
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    I had the same problem with my '75 164E recently. Before I had a new thermo installed it always stayed right in the middle of the green and afterwards it always shot up to the red. I installed a new radiator...no change. Finally the mechanic thought maybe it was an air flow issue and he installed an additional hi-performance fan that he uses on his hot rods (it mounts in front of the radiator and it is somewhat visible through the grill but barely) and it did the trick for my car. Now it stays in the middle of the green again. Of course, we have been having record hi temps here in Tucson...it reached 110 a few times last week and it gives the AC a real workout ':(
    --
    1975 Volvo 164E - 86,000 original miles








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    Does mixture directly affect temp gauge? 140-160 1974

    posted by  Phil S. on  Fri May 27 08:59 CST 2005
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    last visit: Fri Oct 24 13:18 CST 2014
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    Leaning the mixture might increase combustion temps (not necessarily a bad thing). But what thermostat do you have in that new motor?








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      Does mixture directly affect temp gauge? 140-160 1974

      posted by  uniberp on  Fri May 27 09:27 CST 2005
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      last visit: Mon Jan 31 07:08 CST 2011
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      The same thermostat as prior to rebuild. I swapped thermostats last night. The old was marked 180. The new one has a hole with a little brass rattle plug. No difference.

      The radiator cowling is removed. ALways has been.

      I think the radiator is plugged.

      A new tight motor would run a bit hotter, no?

      --
      MPergiel, Elmhurst, IL '74 145e T-5 'Orange Alert'








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        Does mixture directly affect temp gauge? 140-160 1974

        posted by  someone claiming to be Rhys on  Fri May 27 12:17 CST 2005 [RELATED]

        The tightness of a new motor is mostly in the piston ring to cylinder wall interface, and the lifter to cam lobe as well. With a few miles that extra friction will be reduced, and more than that burnishing takes place, and the engine turns quite freely. This is all normal, and with modern "plateau" honing techniques, the initial friction is much less.
        Bearing clearances don't affect the tightness and remain stable (or at least they should) for nearly the life of the engine.







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          Seem to have found the problem(s) 140-160 1974

          posted by  uniberp on  Fri May 27 15:51 CST 2005
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          last visit: Mon Jan 31 07:08 CST 2011
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          After sweating the way home keep the heater on full to keep the temp needle out of the yellow, I looked everything over, flushed the radiator, tested the thermostat, and found nothing wrong. Plenty of water through the radiator, air too.

          Then I thought about it. Looked at it. Thought about what I saw. The engine wasn't getting hot. The overflow bottle barley make a peep when I loosed the cap after a hot run.

          I swapped the voltage regulator, saw a minor a change, gas gauge too. Then I swapped the temp sensor. It runs right in the middle of the "N" now.

          It could have been a partial ground on the temp sensor wire.

          I tell ya.

          Thanks sirs.


          --
          MPergiel, Elmhurst, IL '74 145e T-5 'Orange Alert'







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