What do breather bolts do?
Breather Bolts For your 1991-UP Sportster & EVO Big Twin Harley Motors (does not fit Twin Cam models). These bolts are the cleanest way to solve your crankcase venting issues when installing aftermarket air cleaners on your Harley.
Where does the oil breather go in a car?
On older cars this simply meant having a breather pipe venting to atmosphere, but on all modern cars the breather pipe actually vents back to the engine’s inlet. This helps reduce emissions and prevents the car from dropping an oily residue directly onto the road.
How does a Harley Davidson bypass breather work?
Excess combustion blow-by and oil mist are pushed out of the breathers and exit into your air cleaner, where it is sucked back into the motor to be burned. This system lessens emissions, but can make a mess especially with open element air cleaners, which don’t deliver as much vacuum at the breather to suck up the vapors.
What does it mean when your crankcase breather is blowing oil?
If your crankcase breather is passing oil, chances are that something’s wrong (Okay, we know something’s wrong, but don’t be too alarmed). Here are some things to look for while you’re searching for the source of the issue:
How does oil end up in air cleaner?
Although system details vary, one solution was to plumb the breather into the air cleaner. The fumes coming from the crankcase are then recirculated back into the engine and burnt. Here’s how the oil ends up in the air cleaner. Crankcases can only contain a given volume of air and its attendant pressure.
Excess combustion blow-by and oil mist are pushed out of the breathers and exit into your air cleaner, where it is sucked back into the motor to be burned. This system lessens emissions, but can make a mess especially with open element air cleaners, which don’t deliver as much vacuum at the breather to suck up the vapors.
If your crankcase breather is passing oil, chances are that something’s wrong (Okay, we know something’s wrong, but don’t be too alarmed). Here are some things to look for while you’re searching for the source of the issue:
Where are the breather reeds on a command vertical engine?
Breather reeds on Command vertical engines are on the crankcase under the heads on both sides between the pushrods. Oil separator canister should be on cylinder 1 (starter side) valve cover. So you’re ok, no breather reed required under the breather cover. Make sure the gasket you ordered is the 24 041 67-s.
Is the Kohler command leaking oil our breather cover?
Kohler Command leaking oil our breather cover | LawnSite™ is the largest and most active online forum serving green industry professionals. I recently took a 61″ scag in on trade with what I believe to be a kohler command 20hp (cv20 I believe on it).