Q: I have a leak in the coolant system that I have narrowed to I believe is the water inlet tube off of the lower radiator hose.

asked by on

The timing belt and water pump were replaced within the year. I have had the engine mount replaced as well. The shop that has done all of the work on the car said that the leak was the radiator, and the thermostat housing leaking. I knew of the thermostat housing leaking a little but had never seen any signs of the radiator leaking, so I decided to replace these myself. The radiator had no issues, but I went on and replaced it anyway as well as the lower and upper radiator hoses, thermostat and filler neck. The leak drips down from the area of the water pump, behind the timing belt cover. I have not pulled the radiator again to get a good look at the inlet water tube to determine if this is the problem. Before I do, would replacing the inlet water tube require pulling the timing belt and cover just as the water pump does?

My car has 130 miles.
My car has an automatic transmission.

First off, I would say it would be best to pressure test the cooling system to verify where the coolant is coming from. With the complexity of repairs to the cooling system on this vehicle, it may be worth the time spent to pressure test the system before tackling the replacement. Now then, as far as replacing the o-ring seal on the water pump inlet tube, it should really only require the removal of the bypass hose, lower radiator hose, and the two (or three, depending on manufacturing changes) mounting bolts that hold the inlet tube to the block. I personally would go ahead and replace the tube while I was there, instead of just the o-ring. Granted, this doesn’t mention what it will take to get down to the inlet pipe, but this is all it should take once you have access to it. If this is something that you feel you could use a hand with, consult with a certified mechanic, like those available at YourMechanic.com.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a leak in the coolant system that I have narrowed to I believe is the water inlet tube off of the lower radiator hose.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't move only buzzes when in gear and rolls in park.

Check the shifter cable to the transmission and see if it has broken off the transmission. The buzzing noise is the hydraulic fluid going around the main valve on the transmission and the valve is stuck in between a gear....

Q: the check engine light appears and it gives us the code P0170

The P0170 trouble code does not necessarily go with your vehicle, but it indicates fuel control problems. I recommend the following: Have the fuel pressure tested to see if it is too low or high. Make sure...

Q: Swollen coolant water pump bypass hose

The small hose that comes from the bottom of the thermostat housing and has a small bend then goes straight down into the top of the water pump is called the water pump bypass hose. This is the hose you...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...