This right here. For the entire pump , you would put a clear funnel in the radiator and if it makes a bunch of bubbles 🍾 when giving it gas its good, If it stays flat its not opening. (The coolant- at operating temp)
Simple, informative & to the point!!! No obnoxious music or cutesy irritating gimmicks. No flash and stayed on the subject at hand...no click bait. Just honest helpful information like it should be.. very refreshing...
Just a tip tho, it can still appear to open and it be the problem, if the wax/guts is bad, worn springs or seals is bad it’ll cause issues but to the naked eye it’ll look like it’s opening and closing normally
I learnt the hard way yesterday 😢 I finally got the truck assembled after a month of engine work and when I finally wanted it to start, the truck started overheating and then found out that the thermostat opened after 215 degrees and it’s rated for 195! Quick trip to AutoZone and got a better thermostat and boom, solved my issue
@changmark you have to pay for it first and check it home/shop or anywhere else you can have or make water boiling. I see that a thermometer is a must based on the comments above. Also check thar you are installing it correctly based on your vehicle.
Very informative. Here at Rev Tech we like to know exactly the fault. Sometimes we in the automotive industry tend to just replace it because it’s just what we do….these are some of the very basics that we miss or don’t try and end up wasting time learning what we forgot and costing the customer money and still don’t end up fixing the problem. Great video. Thank you
I got one in the mail , oem gm , and it was just out of the small gm box rolling around in the shipping bag, (not in a shipping box but a bag), so before wasting a bunch of coolant, even though I know these things. I just like to check, thanks. I didn't like it may have been knocked around shipping but works and looks good.
A couple things to be mindful here: A) never pour boiling water, or near boiling water, in glassware like that. B) Stant states that thermostats will START to open at their printed number, not be "fully" open. Fully open is 15-20F higher than what's printed. You've tested that it's fully open at 200F, yes, but you didn't test when it starts to open.
tested 4 thermostats for my older classic. NONE of them opened at the stamped number! IE: 195 degree only partly opened at 205 degrees . had to hit boiling (212) before it opened more!! Finally, I checked a 180 deg. It opened at 195 deg and was fully open at 205deg. My engine requires a 195deg thermo. My car was always running hot. Don't know what's in there now, but ill be swapping it out! Thats how you check thermostats IMHO. 🙂
Great video Pal… I did this method and it work fine but I took the thermostat out and rinse with water and put it back it in the boiling water, the thermostat didn’t open at all…. I believe my thermostat is not functioning properly
I checked mine today and it was jammed half open lol. Wondering why the bus was over heating. I suspect it is jammed in this position and not letting water through. We changed the water pump for good measure. Also going to change the fan clutch for good measure.
My only issue is that my car doesn't wanna warm up, we replaced it but acts the same thing, it'll warm up when it's hot outside but it takes it sweet time. But when it's 50°F out, it won't go past the halfway mark on the gauge
Do you test if it's really open up at 82c? I'm concerned as my new thermostat don't start to open at the exact temperature, would it be interfere the engine cooling? As my radiator and condenser fan will try to maintain the engine temp at 85c while ac on
I tested two and they both open with boiling hot water and close with cold. Its still running hot. Could my bleeding tube that run to the thermostat housing be plugged up??
why go through all that if your car overheats crank the heater to maximum if the temperature gauge goes down with the heat on then change the thermostat, worked for me for the past 30 years
I want to know what make , model and year car you say takes a couple minutes to pull a thermostat. I guess if you don’t count the 20 min drain time ( after the half hour finding the drain) removing air box and snorkel, maybe a bracket or two (10 min more) then use your articulating tools arms and wrists to locate the 2or3 bolts holding the housing on ( variable time here if the engine is cooled off or not) to test the thermostat!? Throw it out after all that ……… oh I see this video was posted pre RU-vid in the late 70’s
Do you have overheating problems? You should stick with the stock thermostat, engines are designed to run at their operating temperature to reduce wear. If you have overheating problems don't just lower the thermostat temp, fix the actual problem.
My car isnt overheating. Its when i get on the highway only my temp gausge needle starts lowering to cold.. im getting the air out the system but maybe not it all.🤔
As the world's dumbest mechanic may I say please, thank you, and may I have another sir? I'm sitting here looking at a rusted fully heated thermostat and I go wait a second I don't even know what it's supposed to look like afterwards and this diagram on the manual sucks cuz it doesn't look anything like the thermostat.... in my mind at least. 🤣
He's wrong. When the thermostat opens it allows hot water to flow from the engine to the radiator, not from the radiator into the engine. He should know better.
