An automotive engine cooling pipe apparatus for fluid-conducting installation within an engine block of an engine comprising a front tube having a proximal portion configured for at least partially slidably and sealably engaging a front sealing ring seated within a front opening of the engine block, a rear tube telescopically engaged with the front tube and having a distal portion configured for at least partially slidably seating within a rear opening of the engine block, whereby expansion of the cooling pipe apparatus within the engine block seats the proximal and distal portions of the front and rear tubes within the respective front and rear openings of the engine block and so provides sliding and rotational resistance thereby stabilizing the installation of the cooling pipe apparatus within the engine block.