Engine running hot

Discussion in 'Forum issues, problems, bugs etc' started by Rick mcadams, Jun 20, 2020.

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  1. Jun 20, 2020 #1

    Rick mcadams

    Rick mcadams

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    My engine running hot im new to the vmax world can anybody point me in the right direction.any help would be much appreciated
     
  2. Jun 20, 2020 #2

    rebeltaz83

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    Gen 1 or 2?
     
  3. Jun 21, 2020 #3

    MaxMidnight

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    How do you know it is running hot?
     
  4. Jun 22, 2020 #4

    Rick mcadams

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    Temp guage is past 3 quarters
     
  5. Jun 22, 2020 #5

    Rick mcadams

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  6. Jun 22, 2020 #6

    rebeltaz83

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    Fan come on? Does it get to the edge of the red? It's normal. If goes into the red it's running hot.
     
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  7. Jun 23, 2020 #7

    MaxMidnight

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  8. Jun 23, 2020 #8

    85vmax

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    Do the gen 1....cooling mod. I dont remember what it is, did mine over 10 years ago....thermostat and sending unit I think.
    My max in florida heat almost never breaks over the halfway mark.
     
  9. Jun 23, 2020 #9

    nswizard

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    Hey mate,
    have you checked your spark plug color?. If it runs lean, temperature can go up.
    I had a similar issue on my max and after carb clean-tune, temp came back to normal.
     
  10. Jun 23, 2020 #10

    Pighuntingpuppy

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    A bit of info missing here. Fans as someone mentioned. Does it ever hit the red. 3/4 is normal especially when sitting in traffic on very hot days. Something even simpler....does it have coolant in the radiator and coolant bottle? Start simple.
     
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  11. Jun 23, 2020 #11

    Zeus36

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    Agree on checking for coolant in the radiator and bottle. Also, is there oil visible in the sight gauge when on the center stand?
     
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  12. Jul 2, 2020 at 7:47 AM #12

    Rick mcadams

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    Yes its a gen 1 could someone tell me about the gen 1 coolin mods. It runs aboit three quarters an what color should the spark plug be sorry for the lack of knowledge im new to the vmax world
     
  13. Jul 2, 2020 at 7:50 AM #13

    Rick mcadams

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    It never hit the red but its real close
     
  14. Jul 2, 2020 at 8:32 AM #14

    Parminio

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    That's normal.

    The fan kicks on right before it gets to the red line. Some people think that it turns on too late so they install a manual switch, but it's been that way since 1985.

    You're not overheating until it moves into the red area.
     
  15. Jul 2, 2020 at 12:35 PM #15

    85vmax

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    Check the archives. I'll look also, but I did mine 10 years ago, with no regrets and piece of mind.
    Got the parts from the auto store.
    Lower temp opening thermostat , and lower fan switch sending unit from a amc or ford I think it was.
     
  16. Jul 2, 2020 at 1:08 PM #16

    85vmax

    85vmax

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    fan switch for an '88 Nissan Sentra or Borg Warner TFS545. Plug and play.
    I used the borg warner from autozone.....I also put in a new thermostat with lower temp opening. 10 years and only barely goes over halfway in trafic in high 90,s temp.
    Good luck
    chris
     
  17. Jul 2, 2020 at 1:57 PM #17

    Pighuntingpuppy

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    If you truly want to know what temperature your bike is running at, get an infrared temperature gun. Aim it at the sides of the cylinders below the cylinder heads. Remember, its not a car. It wont be that low. 200-220F would be what I would expect. My air cooled bikes would run between 240-260F depending on the day and what I was doing.

    Another thing...besides the smell of leaking coolant, an overheating engine has a very distinct smell. You will never ever miss that smell when you come to a stop. If the bike doesnt have a smell and not in the red, you are running normally. Hot days, the bike will run hot. Cold days, the bike will run not as hot.

    I live in New Mexico. We are seeing temperatures of the high 90s to 100s. My bike runs mid while running the interstate. City streets she gets up there near the 3/4 mark. Doesnt smell hot, no lost coolant. Just the nature of this bike.
     
  18. Jul 2, 2020 at 2:32 PM #18

    Rick mcadams

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    Yea i live in houston where the temp is already 97 with 100% humidity. thanks for all the info
     
  19. Jul 2, 2020 at 2:34 PM #19

    desert_max

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    But, but, but…might be the nature of the beast but with regard to the Fan override switch:

    I had one on my 94, and I’m going to put one on this 86. Since the fan doesn’t come on until the needle gets perilously close to the red zone, it doesn’t give you a lot of Headroom in stop and go traffic. If you anticipate a back up, there’s nothing wrong with being able to flip that fan on in anticipation of a creeping needle.

    In hot climates, like here in Phoenix, it’s not a bad idea at all. And easier than replacing thermostats - particularly for the fan itself.
     
  20. Jul 2, 2020 at 3:16 PM #20

    Pighuntingpuppy

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    Absolutely. Nothing wrong with a little piece of mind.
     

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