Valve Covers and Accessories - Breathers

Hardin’s breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. These breathers are easily washable for service.

1-1/2" Clamp-On Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements.  They are used on most Hardin Marine valve cover systems.  The breather is washable providing for easy maintenance.

1-3/8" Clamp-On Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. The breather is washable providing for easy maintenance.

Hardin’s breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. These breathers are easily washable for service.

Push-In Filtered Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. The breather is washable providing for easy maintenance. Fits 1.25" hole.

Push-In Filtered Valve Cover Breather With Chrome Shield (Each)

These breathers feature maximum flow and protection from airborne elements.  They are used on most Hardin Marine valve cover systems.  The breather is washable providing for easy maintenance. Fits 1-1/4" hole.

Hardin’s breathers featuremaximum flow and protection from airborne elements. They are used on most HardinMarine valve cover systems. These breathers are easily washable for service.

• 1" grommet
• 1.75" tall
• 2.5" outer diameter

Push-In Breather With Vent

These popular breathers are used when you would like to vent the crankcase to another location such as the flame arrestor or a vac-u-pan. This unit is used on many MerCruiser hi-performance applications. The push in has a 1" hole and a 5/8" vent hook-up.

To view and download the PDF drawing CLICK HERE

To view and download the PDF drawing CLICK HERE

To view and download the PDF drawing CLICK HERE

Billet Aluminum Valve Cover Breather

These billet aluminum valve cover breathers are so nice they could be jewelry for your engine. Each breather is precision machined from solid billet aluminum. They are height matched with dense foam packing and work well to keep blow by to a minimum. Valve cover breathers contain an effective filter which traps oil vapor and prevents engine compartment contamination. Universal design fits any 1" diameter valve cover hole. Sold Each.

• 2.25" bolt spread.
• 1.75" x 3.0" base.
• 4.25" tall.

4" Tall Aluminum Valve Cover Breather (Each)

• 4" Height
• 3-5/16" Base Length
• 1-7/8" Base Width
• 2-1/8" Bolt Hole center to center.

These breathers are designed to mount to the top of the valve cover with no bolts exposed. Each breather is highly polished.

Burn Down Valve Cover Breather (Each)

The baffled burn down style breathers got their name because they aretraditionally used to route crankcase pressure to the exhaust system.Today they are commonly used to route to a puke tank. These breathersfeature a -16 AN thread for ease of plumbing. Fittings are sold separately.

• 3.875" bolt spread.
• 1.75" base width.
• 4.5" tall.

• Polished Cast Aluminum 
• Dual internal baffles Breather is sloped to match the styling of the valve cover 
• Base measures 3-1/4" Long X 2" Wide with 2-3/8 Bolt Center to Center 
• Breather measures 4" tall. 
• Breather opening measures 1-3/4" Long x 1-1/4 Wide

Short Aluminum Valve Cover Breather - 2-3/4" Tall (Each)

• 2-3/4" Height
• 3-3/8" Base Length
• 1-7/8" Base Width
• 2-1/8" Bolt Hole Center to Center

These breathers are designed to mount to the top of the valve cover with no bolts exposed. Each breather is highly polished.

Breather Splash Cover, fits breathers with mounting center to center of 2" to 2.5".

Burn Down Valve Cover Breather Gasket (Each)

Replacement Gasket for Burn Down Breather

• 3.875" bolt spread.
• 1.75" base width.
  

Replacement gasket for breather models 620-45756 and 620-45757.