Q: Coolant leaking 2009 Volvo Diesel D5 engine

asked by on

Hi,

I have recently noticed that coolant was leaking on my D5 Volvo 5cyl diesel engine.

  • Coolant was between MIN and MAX marks when I left, no apparent leaks while driving, but when the car was stopped/cold, I noticed the coolant was down to the MIN value.
  • there is no white exhaust smoke,
  • the coolant hoses are not hard when the engine is running and hot,
  • the car has no loss of power and seems to be running normally.

At first the coolant leak was slow and I couldn't notice anything dripping under the car. Then with a coolant system pressure tester I put pressure at 1 bar, and the needle was dropping quickly. I could hear a big air leak at the right of the expansion vase.

After putting the system under pressure, I started the car again and now I can see a leak clearly under the car to the ground at the left side of the engine opposite the expansion vase.

I put paper under and the leak is clean/clear coolant.

What could please be the cause?

Thank you for your help

My car has 70000 miles.
My car has an automatic transmission.

Hello - coolant leaks have many sources, sometimes very subtle to locate. Since coolant evaporates on a hot engine, it is often hard to trace to it’s source. It is still possible you have a blown head gasket (early stages), or simply a leaking pipe/hose connection, freeze plug, or other housing that attaches to the engine coolant system. I would recommend a cooling system inspection by a mobile, professional mechanic trained in tracking down these problems, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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. Coolant leaking 2009 Volvo Diesel D5 engine

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: Q: Gear shifter stuck.

The system is controlled by the brake pedal and brake switch. The brake then operates the shift lock solenoid. If you cannot manually release it then the shifter mechanism may be binding. My recommendation is to have a qualified mechanic...

Q: Cooling fan won't stop running.

Hi there. The cooling system can leak from so many different spots that it can be hard to diagnose. If the problem occurred right after the thermostat and gasket were replaced then the work may not have be performed properly....

Q: AC blows hot in the front, cold in the rear

Hello. It sounds like the blend door actuator is failing. This door is responsible for blocking off air flow to the heater core when the air conditioning is on. I would recommend having the blend door actuator tested using the...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...