before covid i've learned from a marine engineering service shop in karachi, at korangi allied engineering has stopped automotive services due to manpower issues. They are only handling services for industrial, earth moving, construction, cranes and marine machinery only.
member has posted their old time contact above please speak to gentleman and post your experience with the workshop. your visit and technical 1st hand experience will be of help to everyone at PakWheels, @meer_baloch1