Factory Specs

Twin Cam Engine

Cold engine start-up:  around 44-50 psi 

Warm engine at 55 mph and up:  30 to 38 psi .

Warm engine At idle:  at least 10 psi 

Knuckle, Pan, Shovel & Evo Engine

Cold engine start-up:  around 44 psi 

Warm engine at 55 mph and up:  30 to 36 psi.

Warm engine at idle:  at least 10 psi 

Harley Oil Pump Inspection

Harley Shovel & Evo External Oil Pump

The gear pockets are ruined on this external oil pump!!!

Harley Twin Cam Internal Oil Pump

The gerotor assembly in this Twin Cam oil pump is destroyed!!!

Looking Good

This is how the Gerotor assembly should look like.

Q and A Harley Oil Pressure

I HAVE LOUSY OIL PRESSURE, DO I NEED A NEW OIL PUMP?

Probably not, we have found that most of the oil pumps are all right.  The problem with lousy oil pressure is the weak spring in the pressure relief valve.  Our products address and correct this problem.  The exception being if you have grooves in the gear pockets of the oil pump body or the Gerotors are fried, then your pump needs replaced.  (See pictures above)

WHY SHOULD I PURCHASE E.R.T. PRODUCTS INSTEAD OF A NEW OIL PUMP?

First of all, oil pumps are expensive, whether you buy an oil pump from Harley-Davidson or you buy an aftermarket oil pump.  Secondly, most of the oil pumps on the market are direct copies of the Harley-Davidson oil pump and ALL of the pumps have the weak pressure relief spring.  Finally, YOU can install our products yourself, most people are unable to replace their own oil pump and will have to pay a shop to do it, increasing the final cost.  And then, after the cost of the pump and installation, you are still going to need our products to make the pump perform the way it should. That is, to produce the correct amount of oil pressure. 

DO I NEED A GAUGE?

An oil pressure gauge is a MUST! It is critical that you know what your oil pressure is. That is why we offer the PG-1 “Pro-Gauge”, the absolute finest oil pressure gauge on the market for the Harley-Davidson motorcycle! 

MY OIL TEMPERATURE IS RUNNING HOT, CAN E.R.T. HELP?

Yes, by installing our products, the cooler oil from your oil tank that is circulated through your engine is increased. This in turn lowers your operating temperatures by 10 to 20 degrees F. Which increases your engine life!