I have found many conflicting opinions on this. I doubt a power steering cap needs to be vented It appears a toyota power steering system a closed system with no vent Looking at the stock reservoir it seems its an air tight seal, but my experience with past hydraulic systems i know they are normally vented, to allow air to escape as the fluid heats up and to let it back in when it cools. • the tank must be vented (i.e • should be tall in shape and hold a minimum of 16 oz
• should have baffling to defuse fluid turbulence • returning fluid should enter below fluid level • should be made of aluminum or good heat conductive material. If you run it non vented you can't fill it all the way since liquid will not compress, so you must leave an air pocket for expansion.i would try it like this, and if it pukes vent it. All hydraulic systems create heat, oil expands, air inside expands, and builds pressure It is their very nature and can’t be prevented
You can design seals so they hold that pressure and maybe yours are. I know i don't have a 4th gen truck but i do have a power steering system from a 2013+ i adapted to my 3rd gen Been having a problem with pressure build up and think it might be a faulty cap Wondering if anyone could be so kind as to check their caps and see if i'm correct. When testing the power steering section of a kse tandem pump, clean oil or fuel must be pumped by the fuel section Running a pump dry can result in severe pump damage.
Whenever i open the cap on the power steering fluid reservoir, there is a release of pressure It sounds like i'm opening a cold frosty adult beverage Is this normal, or should the cap be vented By pauloil » 10 aug 2010, 02:42. Psc sells a fancy vent that holds 6psi of pressure on the system, but they're about $75 I use them on arb solenoids to keep dirt out of them too
Never seal it, thermal expansion will make ugly things happen.
OPEN
