In 1948 Harley-Davidson introduced the
Panhead without spending enough time in research and development. As a
result thousands of these motorcycles were manufactured with a serious
mechanical problem that took H-D 12 years to figure out. And to this day
they have never offered a solution.
The problem is a poorly designed top-end
oiling system, resulting in lack of lubrication that drastically
shortens the life of critical components.
In stock Panhead engines,
oil is routed through a passageway in the head that is only an eighth of
an inch away from the combustion chamber. By the time it reaches the
moving parts the oil is more than 100 degrees hotter than the oil in the
tank, and its viscosity is reduced to less than 10-weight.
Inadequate lubrication by this thin, hot
oil causes excessive wear at the rocker arm, valve stem, and valve
To make things worse, the burned and
blackened oil then returns to tank where it contaminates the engine’s
At FLO Headworks, we have researched this
problem thoroughly and developed an external oiling system that we
guarantee will double the life expectancy of your Pan or Shovel’s
rockers, valves, and guides. Plus, your engine will run smoother and
How big a difference does our Top End
Oiler Kit make? The oil temperature in the tank will be reduced by 50
degrees in Panheads and 30 degrees in Shovelheads. And your oil will lose
that “metalflake” look and start to look like petroleum again.
The machining process we employ is carefully
thought out and precise, and we take lots of time. We love those old
Harley engines as much as you do! Special fixtures and jigs are used to
machine your heads.
The original oil passage is blocked off at the head
gasket surface. Not only does the final result work great, it looks
Only the highest quality materials are
used in our Top End Oiler Kits. The oil manifold is manufactured in
house from top-grade 2024-T4 grade aluminum, 5/8 inch in diameter,
hexagon in shape and polished. The hose is #4 heavy-duty aircraft-type
stainless-steel braided with solid brass ferrules and tested to 150
pounds pressure. The inside diameter orifice has been reduced and
designed to give adequate lubrication without flooding.
This machining process can be done in
less than one week at any time of the year.
Both Top End Oiler Kits come complete
with complete installation instructions. Please specify your model and
which oil pump is being used. For the Shovelhead, this kit requires no
machining of the cylinder heads.
So, if your Pan or Shovel’s oil looks
like metallic paint, you might want to consider shipping your heads to
us for a week or so while we fix the problem.
Top End Oil Drain Kit
This oil drain kit is offered for engines
built with Shovelhead or aftermarket cases by using the vacuum port.
kit reduces your temperature by a FURTHER 30 degrees (in Pan and Shovel)
over the Oiler Kit. Panheads, Shovelheads and Evolution heads require
Our work and products are guaranteed for
one year. For an estimate on your particular application contact us
directly by telephone at 805-481-6300. Or you can