It can cause your oil cap to blow right off, foam around the oil cap is more likely to be water or coolant. Get it checked right away because it can damage your engine. It's usually a sign of a bad head gasket, it lets water into the oil and oil into the water. Check your radiator to see if there is oil in the water and if the water is low.
chances are you have a blown head gasket.....that's about the only thing that can cause an oil type substance in your radiator......check your oil fill cap and area where the cap goes for a white foamy or creamy substance, if this is there that's your trouble
Caused by a high moisture content in the crankcase and indicative of a blown head gasket. www.HeritageGarage.com
It goes where you put the gasoline, in the filler neck.
Disconnect from the power supply, then pour boiling water over the cap. This should cause the cap to expand slightly, try to remove the cap wearing suitable gloves for protection. Dry thoroughly before re-connecting to the power supply.
need vent cap for 2 1/2 gott gas can.
because gasoline is a volatile liquid
Overheating, loss of coolant with no apparent leak, white smoke from the exhaust, oil over full, a foamy substance on the under side of the oil fill cap, or air bubbles escaping from the radiator with the engine running cap off.
Loss of coolant with no apparent leak, overheating, white smoke from the exhaust, oil level overfull, white foamy substance on the underside of the oil fill cap, air bubbles escaping from the radiator with cap off engine running, and possible misfire.
Sorry, to tell you but white smoke from the exhaust is a sign of a blown head gasket or cracked head or both. Other symptoms are loss of coolant with no apparent leak, overfull oil level, a white foamy substance on the underside of the oil fill cap, air bubbles escaping from the radiator with engine running radiator cap off. Caution: Only remove the cap on a cold engine. Stop driving this vehicle immediately or serious engine damage will occur.
A peaked cap is commonly referred to as a "visor cap" or "military cap." Another popular name for it is "golf cap," especially when associated with leisure activities. In some contexts, it may also be called a "newsboy cap" or "flat cap," although these terms can refer to slightly different styles.
Loss of coolant with no apparent leak. White smoke from the exhaust. Overfull oil level. A white foamy substance on the underside of the oil fill cap. Ai bubbles escaping from the radiator with cap off engine running. And a possible miss on one or more cylinders.
A radiator cap would not cause a leak! However, if the radiator cap is holding pressure, other weak parts could signal issues in need of attention.