How an Engine works Internal combustion engines are a finely tuned machines that must have not only the proper air/oxygen to fuel ratio but also must be manufactured to fit together with extremely low tolerances between parts.  The compression chamber must be sealed with tight tolerances between metal pieces using fuel and air in a proper ratios without undue friction between parts.  Gaskets are often times used to help seal the chamber such as head gasket and main bearing seal gaskets, while the valves must seat properly, sealing the chamber for effective fuel consumption and power

Gasoline engine To put it simply, the exact amount of fuel must fill the piston chamber while the piston is in the low position, and then the ignition source must ignite the fuel at the exact time when pressure within the cylinder is such that the resulting explosion will drive the piston to the lower position again, with a repeat of the above action turning the gears that drive the conveyance.

Diesel engine A diesel engine uses compressed air to ignite its fuel.  In other words, the interior combustion chamber must compress air to the point where it will ignite on its own from the temperature increasing because of compression.  This compressed air then ignites fuel that's being shot into the chamber at the exact time when the temperature is such that it will ignite the diesel fuel, this in turn will drive the cylinder to the lower point where compression of air and the added fuel can begin the process over again.  The resulting explosions within the piston chamber drive the cylinders up and down then moving the gears to move the convenience. Rebuilt Engines Store is proud to offer rebuilt engines that have been re-machined and rebuilt to exact tolerances.  Each engine is measured individually, re-machined for each individual part, and then reassembled by craftsman with over 30 years of experience.  We then send you a complete engine block that has been enhanced by our exacting process, with a warranty, unheard of in the industry, of 10 years/100,000 miles.