If not and you just recently bought it used someone may have added some kind of stop leak gunk to it to seal up a radiator leak.
Black radiator cap.
The first question i would have is are you the original owner or have you owned the car for several years.
This is useful information prior to cap removal.
Radiator cap notch grip round 16 psi maximum pressure aluminum black anodized each 10 part number.
Thermocap black radiator cap by mr.
Canton racing 80 092 filler neck universal billet aluminum weld on 32 26.
While you re in there check to make sure your coolant overflow tank is working properly.
Billet specialties v 8 style radiator cap 16lb radiator ford car truck hot rod.
Knowing your coolant temperature can help to prevent burn injuries.
Billet specialties blk75120 black anodized radiator cap 30 08.
Myson trv 2 way thermostatic radiator valve 30 mm commissioning shut off cap.
If you have a bad radiator cap the coolant could get released too quickly and cause the reservoir to overflow.
Safecap black anodized finish 25lb.
Billet specialties blk75125 notch grip 16 lb aluminum radiator cap black.
Ships from and sold by auto accessory depot.
Locked on for safety.
Also if the rubber lines from the radiator can start breaking down and leaving black dust in the radiator water.
5 out of 5 stars 2 2 product ratings myson trv 2 way thermostatic radiator valve 30 mm commissioning shut off cap.
Thermocap black radiator cap 2476bk by mr.
Safecap radiator cap with locking shell and black anodized finish.
Safecap radiator cap with locking shell and black anodized finish.
Coolant goes into the reservoir tank as it expands.
Knowing your coolant temperature can help to prevent burn injuries.
This could be from the radiator or water pump.
Honeywell trv radiator valve commissioning cap cover black pack of 1 2 4 6 8 10.
First check you oil.
Available to ship in 1 2 days.
Aluminum oxide is dark in color and would darken your fluid.
The radiator cap releases the extra pressure by sending some coolant into the overflow tank.
Thermo cap with its built in calibrated thermometer indicates the.
Second is that there is something in the system that is failing.