Performance Pistons 53 results

Pistons from Sears for that Big Engine Job

When it comes to pistons, Sears has you covered. Replacing pistons can be a resource-intensive process. It's not a repair that can simply be done by popping the hood. In order to replace the pistons, you'll have to remove the entire engine block from your vehicle. Most likely, if you're looking for new pistons, chances are you're rebuilding an older engine. If you're repairing pistons in a modern car, it's best left to professional mechanics, unless you are very confident in your ability. Engine bays are much more complex and cluttered than they were 30 years ago and removing the engine block can be quite a hassle. If you're concerned about your ability, best take your vehicle to a mechanic.

When replacing pistons, you'll have to keep in mind that you'll need piston rings and piston pins in addition to the piston itself. Most automotive pistons have 3 rings, which require special piston ring pliers to remove and install. Luckily, Sears carries both piston ring pliers as well as piston ring sets so you won't have to worry about buying the rings individually. These rings serve three main purposes. They seal the compressed gases within the combustion chamber, help transfer heat from the piston to the cylinder wall, and help control oil consumption. Without piston rings, the fuel and air mixture would seep around the piston and would not be able to obtain enough compression.

Piston pins, also known as gudgeon or wrist pins, connect the pistons to the internal connecting rods, which are connected to the internal crankshaft. These pins endure some of the highest temperatures within an engine so they must be very durable while at the same time remain small and light enough to fit inside the piston itself. Due to this, piston pins are one of the most highly engineered pieces within an engine, often being made from very complex metal alloy.

As with any other part of an engine, pistons see wear over time. Normally, it's the piston rings that will need to be replaced and not the piston itself, but it's always good to be safe and have the pistons checked if you have access to them. No matter what you end up needing, whether a set or two of piston rings or all new pistons and connecting rods, you'll be able to find the parts and tools you need at Sears.