Why does my Panhead engine keep leaking oil?
To keep excess oil from building up in the primary, there is a drain at the bottom of the primary which allows the oil to drain out and down a tube onto the rear chain, thus lubricating it as well. This is one of the reasons old bikes seem to be constantly leaking oil, but it’s actually not a leak it’s a self oiling chain system.
How did the Harley Davidson Panhead engine change?
When Harley Davidson decided to redesign their overhead valve big-twin engine to achieve what became know as the “Panhead”. They had these goals in mind: Major engine components were redesigned to achieve these goals. Cylinder heads were redesigned and cast in aluminum with large cooling fins. As opposed to the earlier cast iron heads.
Why is aluminum used in a panhead engine?
Aluminum transfers heat over 4 times as rapidly as cast iron. This increases engine cooling efficiency. Internal oiling of rocker arms coupled with large one piece valve covers for each cylinder that completely covered both rocker arms eliminated oil leaks.
When did they start using external oil lines?
Another minor change. external oil line. From 1963-65 the oil feed lines to the cylinder heads were relocated using a external line from the engine case to the cylinder heads to deliver cooler oil to the cylinder head by passing it through an outside oil line.
To keep excess oil from building up in the primary, there is a drain at the bottom of the primary which allows the oil to drain out and down a tube onto the rear chain, thus lubricating it as well. This is one of the reasons old bikes seem to be constantly leaking oil, but it’s actually not a leak it’s a self oiling chain system.
When Harley Davidson decided to redesign their overhead valve big-twin engine to achieve what became know as the “Panhead”. They had these goals in mind: Major engine components were redesigned to achieve these goals. Cylinder heads were redesigned and cast in aluminum with large cooling fins. As opposed to the earlier cast iron heads.
Aluminum transfers heat over 4 times as rapidly as cast iron. This increases engine cooling efficiency. Internal oiling of rocker arms coupled with large one piece valve covers for each cylinder that completely covered both rocker arms eliminated oil leaks.
When did the Harley Davidson Panhead get an O ring?
In 1955, the Panhead’s intake manifold, a carryover from the Knucklehead, was upgraded with O-ring style ports. The solid lifter/hydraulic push rod was switched to a solid push rod and a hydraulic lifter/tappet.