Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: I just recently had a new transmission put in and now theres alot of play in my shifter and i can easily tap my shifter from drive

Hello and thanks for your question. On your shifter there is a screw on the base that controls the looseness of the shifter. Remove the carpet around the base of the shifter and you will see the screw. Tighten the...

Q: Car has a coolant leak

If you did not bleed the cooling system after performing the repair, there is probably air in the system. Air can be bled by running the engine with radiator cap removed and a special funnel installed, or by using a...

Q: A/C, heater, defroster, actually no air is coming out at all. Car is a 2006 Volvo s 60 r turbo.

Hi there. It is possible that you have a blown fuse, damaged electrical relay or the blower motor itself is damaged. When all air systems (AC and Heater) don't blow air into the cabin, it is usually due to an...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...