While adding Antifreeze should I run my vehicle?
- Alfred WLv 61 month ago
Coolant and not Antifreeze. I have Honda coolant "Type 2" that has corrosion inhibitors without silicates and is not over expensive. Coolant also has a high boiling point. One can turn the engine on and watch the flow or wait for bubbles from air pockets but after a minute or two it will get dangerously hot. Therefor I always check in bottles if the amount of fluid that came out, equals the amount that went in. Then you know scientifically and do not have to guess. The Service Manual may have directions for certain air bleed procedures. Personally I do have a plastic reserve tank that vents either fluid in or out with engine temperature difference. One can also just check the mark at the reserve and keep the radiator cap closed. It is a good practice to try to check the thermostat because some fluid may wear the alloy zinc and copper out and cause the thermostat to fall apart. When you can not look inside or take the thermostat out easily from the opening and inspect it for any damage, the fluid should flow slowly past it when cold. When streaming fast down the neck, then the spring dis-functions and leaves it already in open position. This is a common find and a cold engine damages itself. The stream being blocked initially is a second reason not to wait for air bubbles. There is hardly any flow. On the picture is the radiator cap with an air vent that is to be opened above it.
- thebax2006Lv 71 month ago
Fill the radiator and reservoir with a 50/50 mix of antifreeze and water. Then start the motor and run it for 15 minutes with the radiator cap off to purge the air bubbles from the cooling system.Source(s): Mitsubishi Master Tech
- regeruggedLv 71 month ago
No. Wait until the engine is cold. Add coolant in the reservoir up to the "cold fill" line.
- PoppyLv 71 month ago
If engine was over heated, yes. If only at operation temperature, no. Radiators are not meant to be opened for this any longer, use the over flow jug to keep fluid level correct.
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- The DevilLv 71 month ago
If the engine is hot, absolutely you should idle the engine as you slowly add coolant. If the engine is cold, just pour it in until it's full, then check it by idling the engine to get the bubbles out.
- Anonymous1 month ago
It TOTALLY DEPENDS on the AGE and MAKE of your car or truck....& how hot is the engine right now? Also, is the radiator totally devoid of fluid - half full - nearly full?
- CBLv 71 month ago
If you are just topping up then NO assuming it is a fairly modern automobile with a coolant overflow/reserve. You are just topping up the reserve on a cool engine as the radiator has drawn in all the overflow anti-freeze during the cool-down cycle and you are just topping up the reservoir.
- eyecue_twoLv 61 month ago
Depends on where you are adding it to. The radiator is a yes. The reservoir no.
- realtor.sailorLv 71 month ago
Yes (presuming it's a cool engine) and leave it running for about 15 minutes to make sure you get all the air out.
- SatanLv 71 month ago
No, there's no need and more chance of being scalded.