2001 Hyundai Tiburon by pass hose

SHASHE

MEMBER
2001 HYUNDAI TIBURON
110,000 MILES

When I returned to my car from store I noticed antifreeze on road. Car was not running hot prior to stopping. Less than 2 miles later car started to run hotter (but not redlined) when I arrived at my house. More antifreeze leaked from what appeared to be drivers side. I left car alone until next morning when I added antifreeze and ran car. Initially for about 5 seconds car ran slightly hotter but then returned to normal temp. Took it to service station to get checked out and they said it was by-pass hose and they changed it and added antifreeze. What is a by-pass hose?

Wednesday, June 5th, 2013 AT 10:10 AM

1 Reply

CARADIODOC

MECHANIC
34,330 POSTS

The water pump runs all the time the engine is running. When it's still cold the thermostat is closed so the coolant will heat up. Since it's closed there is nowhere for that coolant to be pumped to by the water pump. The bypass hose allows some coolant to go around the thermostat, and in some cases it can be pumped through the heater core in the dash. That means the heater can start warming you up before the thermostat opens and allows hot coolant to flow through the radiator.

Of all the things that can suddenly spring a leak, the bypass hose has to be one of the least expensive. Some are hard to get to but they typically don't cost very much.

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Wednesday, June 5th, 2013 AT 10:28 AM