Should engine be running when filling coolant?

Make sure your engine is off and cool, the vehicle is in Park or Neutral, and the parking brake is set. If your engine is cold, the coolant level should be up to the cold fill line. Loosen the reservoir cap just a little, then step back while the pressure releases. Then, remove the cap completely.

Why is my coolant reservoir cold?

If the coolant is still below the “Cold” or “Full” line, this probably means that you have a leak somewhere in the system and you should get your car to an auto mechanic for further inspection. As you can see, checking and refilling your car’s coolant level is about as easy as filling your tank with gas.

Where should the coolant level be when the engine is cold?

If you check your coolant level when the engine is cold, the coolant should be at or above the “minimum” or “fill” line on the transparent refill container. If you check your coolant level when the engine is hot, the coolant should be at or just below the “max” line.

Is there a coolant leak on a Duramax Diesel?

Currently, since December 2010 another supplement to the EGR cooler pressure tester adapter set, EN-48974-20, was shipped essential to dealers to diagnose EGR cooler engine coolant leaks on all 2010-2011 Duramax™ 6.6L engines equipped with multiple cooler EGR system.

What causes low coolant level in radiator surge tank?

The low coolant level in the radiator surge tank may be due to the fill process at the assembly plant, which cannot purge all of the air from the cooling system and the surge tank. After the engine has been thermally cycled, air rises and causes the coolant to become lower than when initially filled. Coolant Levels

Is the coolant level on my Silverado Sierra low?

A Low Coolant message may be displayed on the Driver Information Center of some 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P). An inspection of the radiator surge tank may appear to show a low coolant condition.

Can a head gasket failure cause engine coolant loss?

The AERA Technical Committee offers the following information on engine coolant loss on 2002-2016 GM 6.6L Duramax diesel engines. It is important to note that not all instances of coolant loss on these engines is the result of head gasket failure.

How long does it take to fill a Duramax coolant tank?

Book says run at 2000-2500 rpm until at temp, then an additional 5 minutes at that rpm. Idle for 5 minutes, as you add more coolant, run it up again for 5 more minutes. Idle and keep filling until you hit the top of the bottle, keep going slowly until 1/3 goes into the surge tank.

Should engine be running when filling coolant?