Method of repairing an engine cooling system and a repaired engine

A method of repairing an engine by stopping a coolant leak due to a defective front seal of a coolant transfer pipe of the engine, the method comprising:

• draining coolant from the engine, wherein the engine includes an engine block, a timing cover attached to the engine block through which a timing cover coolant passage is provided, a water pump, and wherein the coolant transfer pipe extends into the engine block and wherein the defective front seal is located at a proximal end of the coolant transfer pipe that abuts a rear opening of the timing cover coolant passage;
• removing the water pump from the engine without removing the timing cover and without removing an intake manifold of the engine;
• inserting a hollow repair stent and a coolant pipe repair sealant through a front opening of the timing cover coolant passage and into the coolant transfer pipe to stop the coolant leak, wherein the coolant transfer pipe remains in place behind the timing cover coolant passage, and wherein the hollow repair stent bridges the connection between the timing cover coolant passage and the coolant transfer pipe;
• prior to inserting the hollow repair stent, cutting away portions of the defective front seal that protrude into the timing cover coolant passage;
• prior to inserting the hollow repair stent, sanding off a casting mark from the timing cover coolant passage and cleaning the timing cover coolant passage with a sanding rod;
• prior to inserting the hollow repair stent, determining a depth of applying the coolant pipe repair sealant in the timing cover coolant passage using a marked brush;
• subsequent to inserting the hollow repair stent, re-assembling the water pump to the engine, wherein the hollow repair stent remains installed within the coolant transfer pipe and the timing cover coolant passage;
• and
• adding coolant to the engine.