Table of Contents
What tools are needed to remove press fit piston pins?
Universal Piston Pin Press-Out Tool (PPE-1) A universal tool set to use with your shop press, this tool is made of high quality steel and is sized to work with most applications. This set is for basic removal of pins without damage to the piston.
Can you reuse pressed wrist pins?
After cleaning and inspection, they should be completely reusable. It is reusing the pistons that I would be more concerned about. New pistons and pins is not that expensive.
What holds the wrist pin in place?
The wrist pin is held in check and kept from scratching the cylinder by a spring-loaded lock on each side that secures the pin between the pin bosses. Wrist pin locks are spring-type fasteners designed to provide an interference fit in a groove machined at the edge of each pin boss on the underside of the piston.
How is wrist pin installed?
Securing the pin to the rod is usually accomplished by press-fitting. The little end of the connecting rod is heated, which expands the metal and the diameter of the hole. The piston is positioned over the rod, and then the pin is pressed into place.
Do wrist pins have bearings?
In a four-stroke engine under power, the wrist-pin bearing in the small end of the con-rod undergoes regular load reversals. As the rod stops the rising piston at the end of its exhaust stroke, piston inertia pulls up on the wrist pin, but when compression and combustion occur, gas forces push down on the wrist pin.
How often should you change rod bearings?
The original rod bearings should be replaced every 60-80,000 miles, especially on vehicles which followed BMW’s 15,000-mile oil change recommendation.
Can you hear Rod knock at idle?
Yes, you can hear rod knock upon engine startup, idling, accelerating, and decelerating. The noise will increase as you step on the gas pedal and decrease as you remove your leg.