Coolant Tank Cap Function

[rdass623]

other than being a cap, hmmmmm lets see..... adds a splash of blue color to the interior of the rear trunk. it is not a pressure relief and recovery cap like the typical radiator cap in a overflow recovery system.

[lkchris]

It does hold pressure and if it doesn't you'll have coolant boiling out.

[Perfectlap]

keeps your head from cracking. All for the bargain price of $20.

Or you could lose an engine for $20. A matter of perspective.

Search this forum for air pockets.