Its not just about the pumps. Its very sad but our beloved country is full of thugs. My colleague was having some heating up problems with is Cultus. He is by the way totally "Farigh" when it comes to cars. So his mechanic replaced the radiator first - charged him 6k. Two days later the car heated up again so he charged him another 5000 for gasket and 1500 for servicing self(which by the way was totally fine).
The car continued heating up. I stepped in and sent him to my mechanic where he found that the head was never opened, the mechanic just opened the tappet cover to show him that the engine head was never opened. Turned out his water body and lower hose were bad . Replaced and problem solved.
The self too was never serviced we somehow probed a little bit through near by shops which my mechanic knew and the exact words of his mechanic were" Bhai eid ka time hay thoray paisay bananay thay aur waisay bhi aadha hissa tau malik ka driver na lay liya". Turned out his driver and mechanic were both involved in ripping.