Fluid dam and pressure tester apparatus and method of use

An apparatus for retaining coolant in an engine cooling system during maintenance and repair and for pressure testing the engine cooling system for leaks after completion of work thereon, comprising:

• a) a main housing having a first end, a second end, and walls defining an internal chamber;
• b) an inlet conduit having walls defining a first inner flow chamber suitable for providing flow through passage for a pressurized medium, said inlet conduit being connected to said main housing;
• c) an outlet conduit having walls defining a second inner flow chamber suitable for providing flow through passage for a medium, said outlet conduit being connected to said main housing;
• d) pressure relief means positioned on the first end of said main housing;
• e) attachment means located on the second end of said main housing for connecting the apparatus to an engine cooling system so that any coolant fluid within the engine cooling system is in flow through communication with said main housing internal chamber;
• and,
• f) nozzle means located within said main housing internal chamber for selectively creating different pressure levels within said internal chamber when a pressurized medium flows therethrough so that the apparatus selectively provides a vacuum effect and a pressurized effect upon any coolant fluid within the engine cooling system.

An apparatus for retaining coolant in a radiator cooling system while repairs are made to the cooling system, comprising:

• a) a main housing having a first end, a second end, and walls defining an internal chamber;
• b) an inlet conduit having walls defining a first inner flow chamber suitable for providing flow through passage for a medium, said inlet conduit being connected to said main housing;
• c) an outlet conduit having walls defining a second inner flow chamber suitable for providing flow through passage for a medium, said outlet conduit being connected to said main housing at a location substantially opposite from said inlet conduit;
• d) pressure relief means positioned on the first end of said main housing;
• e) attachment means located on the second end of said main housing for connecting the apparatus to a radiator cooling system so that any coolant fluid within the radiator cooling system is in flow through communication with said main housing internal chamber;
• f) pressure gauge means located on said main housing, said pressure gauge means being constructed and arranged for sensing pressure within said main housing internal chamber;
• and
• g) nozzle means located within said main housing internal chamber and extending generally from said inlet conduit toward said outlet conduit for creating differential pressure regions within said apparatus so that a low pressure within said main housing internal chamber provides a suction upon coolant within the radiator cooling system and retains the coolant within the radiator cooling system while maintenance and repair is accomplished thereon independent of any temporary openings introduced into the radiator cooling system due to such maintenance and repair.

A method for retaining a fluid in a closed-loop fluid-containing operating system during periods when the operating system is opened for maintenance and repair, and for pressure testing the system after completion of work thereon and closure thereof, comprising the steps of:

• a) providing a pressure and vacuum apparatus having a main housing with walls defining an internal chamber, an inlet conduit having a flow control valve and an outlet conduit having a pressure gate valve, each conduit constructed for providing flow through passage of a pressurized medium generally to and from said main housing internal chamber;
• b) installing said pressure and vacuum apparatus onto a normally closed-loop fluid-containing operating system at a location above the level of any fluid contained within the operating system so that such fluid is in communication with the main housing internal chamber;
• c) verifying closed said flow control valve and opening said pressure gate valve;
• d) attaching a pressurized medium supply source to said flow control valve;
• e) opening said flow control valve to permit flow of the pressurized medium from said flow control valve through said pressure gate valve to create a fluid retaining vacuum within the pressure and vacuum apparatus prior to and during repair and maintenance upon the operating system.

A method for retaining coolant in an engine cooling system while component replacements or repairs are made to the cooling system, for pressure testing the cooling system after completion of repairs, and for utilizing a combination pressure and vacuum apparatus, comprising the steps of:

• a) providing a pressure and vacuum apparatus having a main housing with walls defining an internal chamber, an inlet conduit and an outlet conduit each constructed for providing flow through passage of a pressurized medium through said main housing internal chamber;
• b) removing a radiator cap from an engine coolant fill neck;
• c) installing the pressure and vacuum apparatus on the fill neck so that coolant within the engine radiator is in communication with the main housing internal chamber;
• d) securing a discharge hose extending from said pressure and vacuum apparatus outlet conduit to a fixture;
• e) locking a self-locking radiator cap onto a top end of said pressure and vacuum apparatus;
• f) closing a flow control valve;
• h) opening a pressure gate valve;
• i) attaching a pressurized medium supply source hose to said flow control valve;
• and
• j) opening said flow control valve to permit flow of a pressurized medium from said flow control valve through said pressure gate valve to create a coolant retaining vacuum within the pressure and vacuum apparatus to and during repair and maintenance of the engine cooling system.