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Thermostat help

Discussion in 'Tech Discussion' started by Turbo4whl, Jun 28, 2020.

  1. Turbo4whl

    Turbo4whl Full Access Member

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    Maybe just me, never miss a chance to add a bleed hole in any thermostat that was made without one.

    20200628_165331.jpg 20200628_165345.jpg
     
  2. idahovette

    idahovette Full Access Member

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  3. SirRobyn0

    SirRobyn0 Full Access Member

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    You guys know I work in shop, so I've installed many t-stats in damn near 30 years. Yes in the past I've drilled holes for bleed holes, not so much any more. We just try to buy ones that already have bleed holes to begin with. When you do have to drill a hole remember you have to be careful not to drill to big of a hole or you'll effect warm up in cold weather. And on newer rigs that'll set a check engine light. Really that hole in that pic is bigger than I would go. And of course keep in mind some brands such as A/C delco put bleeders in the center part of the thermostat, so people miss that and drill a hole anyway. Now a days
     
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  4. 75gmck25

    75gmck25 Full Access Member

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    I have started using the Stewart high flow 195 degree thermostats, which already have a bleed hole. I don’t really know how much more flow they provide, but they are only a few dollars more than a standard thermostat.

    I’m also using a Stewart stage one high flow water pump. The base cast iron version is not crazy expensive.

    Bruce
     
  5. SirRobyn0

    SirRobyn0 Full Access Member

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    Good info on the Stewart stuff I'll have to check them out. I've pretty much stuck to the A/C Delco stuff as they still make thermostats and water pumps for these trucks.
     
  6. Turbo4whl

    Turbo4whl Full Access Member

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    Hey Rob, I may have you beat as I have been working on trucks just under 50 years. Usually I will drill a smaller hole if needed. The thermostat in the earlier picture is going in my 64 year old 1956 3800. I don't want it to clog with rust.

    The parts guy was trying to sell me 180 degree stat but I did find the 160 degree. I am pretty sure this larger hole will not effect the check engine light.

    Some more expensive truck thermostats with a very small bleed hole have a dingle berry in the hole to make sure it does not clog.

    20200601_103125.jpg 20200601_103141.jpg

    So I have a question that anyone can answer. The first correct answer, with an explanation of why, will win the prize.

    What may happen on warm summer day if your truck has no thermostat installed? This may even happen on a cooler day.
     
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  7. mtnmankev

    mtnmankev Full Access Member

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    I think the engine will overheat because there is no thermostat to "cycle" allowing time for the coolant in the radiator to dissipate the absorbed heat from the block.
     
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  8. Turbo4whl

    Turbo4whl Full Access Member

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    We have a winner already!

    Pick a prize.... or I'll look for more:

    20200629_174025.jpg
     
  9. 80BrownK10

    80BrownK10 Full Access Member

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    People remove them out of outboards thinking it's best to keep them cool. But it takes longer to warm up and in winter it may never warm up unless underway. Causing it to carbon up esp in two strokes.

    I'm a boat guy and I work on mine cause I don't trust many folks and there just too darn expensive. I like old school simple two stroke motors and still run an OMC tripple. One of the last ones before Bombardier bought them. RIP Johnson and now Evenrude:(
     
  10. mtnmankev

    mtnmankev Full Access Member

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    Thank you !!!
    It's a tough choice between the brake light switch, the oil pressure switch, the PCV valve and the intake manifold fittings.........
    All very usable for me, so I will figure out what I need the most.
     
  11. mtnmankev

    mtnmankev Full Access Member

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    Is the intake manifold fitting a set of one piece or two ?
    I definitely need the two armed one.
     
  12. Turbo4whl

    Turbo4whl Full Access Member

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    Everything is new except the vacuum fittings. They are not the part number on the box. That was the one I needed, it has a top-load port too.
     
  13. Turbo4whl

    Turbo4whl Full Access Member

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    The two port fitting is yours if that is what you want.
     
  14. idahovette

    idahovette Full Access Member

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    Atta boy, Kev!!!!
     
  15. SirRobyn0

    SirRobyn0 Full Access Member

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    @Turbo4whl you have me beat especially if that is years at it professionally, and I will never make 50 years as a mechanic at least not as a profession, the only reason I've made it as long as I have is because I'm in management now and don't turn a wrench for as many hours each day as I use to. My body is falling apart at an alarming rate. Also you and @mtnmankev I think climate has something to do with overheating without a thermostat. I've heard about it enough times I believe it, but I've never seen it happen around here.
     
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