In the name of Allah, the Most Gracious, the Most Merciful. Peace, mercy, and blessings of Allah be upon you.. Brothers, visitors to the Haraj website, we have Silverado engines available with a 5-month electronic warranty. We also have overhauling for factory engines with original spare parts and the same 5-month warranty. The manufacturing defect, which is the weakness of the oil pump, is addressed by replacing the oil pump with a high-pressure oil pump, widening the oil and water passages, and completely replacing the engine gasket. Of course, the following are replaced: (pistons, piston rings, connecting rods, gasket set, lifters, main and connecting rod bearings, and original spare parts for the flywheel). External consumable accessories are checked and the customer is informed about them, such as the radiator, cooler, mounts, and so on, as a free service. We ask Allah for success for us and for you. Thank you.