Talking to a friend of mine, he told me the thermostat should be opening all the way, but the one I put in only opens a bit. The old one I took out opened a lot more, but the water temp wouldn't really get over 60. Now it gets to 90 and stays there, so what's right?
how much should a thermostat open?
- Thread starter Ian_83
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The old school trick of thermostat testing - put it in a cup of boiling water.....
Yes mate, now that's some old school mechanics right there!! lol
Yes mate, now that's some old school mechanics right there!! lol
That's what I did, it only opened slightly, the old one opened a lot more. My theory was: Old thermostat, must be a weak spring and opening too which meant there was too much water going through the radiator and making it too cold. New thermostat, not opening as much because the spring wasn't weak. However, he's got me doubting myself now.
As long as water can pass through then the amount it opens isn't really that relevant.
Bear in mind that the water system is under pressure which will help it open.
Bear in mind that the water system is under pressure which will help it open.
Yeah, i'll just not worry, I always keep an eye on the temp. I do 30 miles for work and it hit 90 and just sat there the whole time so must be fine 
Keep in mind how hot the water in the cups going tobe, it's going tobe constantly cooling down, the only way to see if the thremostat will fully open is to pop it in a pan of boiling water and maintain the temp above 90 degeress . Can also do some boiled egg's with soliders while your at it, win win haha.
. Can also do some boiled egg's with soliders while your at it, win win haha.
