What is the purpose of a breather bolt?
You have to have the breather bolts to let the built up pressure outta the engine. It is the same as the PCV system on your car.
Can a head breather cause a piston to smoke?
Granted, the amount of blowby oil from the breather may be minimal (not enough to notice any smoke) but over time the effects of injecting oil back into the combustion process will be cumulative and can form deposits on the pistons, heads AND valves.
How can I Stop my Head breather from blowing oil?
You will NEVER truly stop a head breather from blowing oil it’s the nature of the design, but this will conceal it without making a mess. You can waste your money on those expensive billet crank vents which do nothing more than the umbrella valves in the rockers. Drilling out the oil return holes to 1/8″ in the rockers will do a lot more for you.
Why do you need head breather bolts on a V twin?
You have to have the breather bolts to let the built up pressure outta the engine. It is the same as the PCV system on your car. if you plug your breather holes !
Do you need a head breather for a Sportster?
They do not market one for a Sportster just Big Twins, JERKS! You will NEVER truly stop a head breather from blowing oil it’s the nature of the design, but this will conceal it without making a mess.
How does a Harley Davidson Top breathing engine work?
Top breathing engines breath, or vent, through the top breather bolts which are threaded into the heads of a Harley Davidson motor. The air inside a motor is saturated with oil. It exits through the breather bolts and into the air box where the air is filtered and the oil is captured in the air filter.
Where are the breather bolts on a Harley Davidson?
Remove the air filter from the cleaner assembly to access the breather bolts. You will need a couple of hose barbs or banjo bolts to connect hoses to and redirect the blow-by, rather than the throttle body. These typically are all included in the breather kit, or you may be able to re-purpose the factory breather bolts and reroute the hose.
Granted, the amount of blowby oil from the breather may be minimal (not enough to notice any smoke) but over time the effects of injecting oil back into the combustion process will be cumulative and can form deposits on the pistons, heads AND valves.
You will NEVER truly stop a head breather from blowing oil it’s the nature of the design, but this will conceal it without making a mess. You can waste your money on those expensive billet crank vents which do nothing more than the umbrella valves in the rockers. Drilling out the oil return holes to 1/8″ in the rockers will do a lot more for you.