Why my resevior is always over dlowing qhen dirving
My reservior is alway overflowing when driving i have change my rad cap already but still the same
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When you say "overflowing" where do you mean it is flowing from?
If it is overflowing from the Plastic Reservoir, it is simple: If you try to keep THAT full it will ALWAYS overflow. Here's why:
The coolant expands when it gets hot and so if the system is topped off all the way instead of to the "MAX FILL" line, there is no place for the fluid to go as it heats up... so the excess coolant flows out the drain tube. If this is your issue, it's a common mistake, people fill the reservoir completely and then wonder why the fluid keeps overflowing and the reservoir doesn't stay full... it NEVER will because as the coolant cools back down, the volume shrinks again and the reservoir is down again. to fix this, look at the side of the reservoir, locate the MAX FILL line, usually about half-way up the side, and only fill it to that point... (check and fill when cool, like you should with ALL the fluids) it should then stop overflowing, if not get back to us for more possible ideas. If this ISN'T the problem it does not bode well.
Good Luck.
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@chisantos what year is your Hyundai? Does it overheat? Any other symptoms beside the overflowing?
by oldturkey03
Hyundai Accent 2014. power loss when straight driving.
by chi santos