Intake manifold and valve cover gasker and thermostat repair on 1998 Chevrolet Malibu

Right after start up and about 10 min driving my temp sky rocketed. I pulled over and it went to normal. Drove home and found my car was leaking coolant under my car by the belts and my hoses were hard and full of pressure.. Took to a shop and was told to replace intake manifold and valve cover gaskets and thermostat... $350 for job... picked up the car and drove home I noticed it is still leaking from the same place. Took it back and now I need a water pump $75 more... Why could they not diagnose that first... Did I get screwed or was it a common mistake for them not seing that? Please help

Asked by for the 1998 Chevrolet Malibu
It's hard to know without seeing it, but if the intake manifold was leaking above the water pump it's possible they didn't think it was leaking. However, a good technician will pressure check the cooling system after working on it to verify the repairs, and it doesn't sound like this happened. It sounds like they are giving you a good deal on the water pump, but I would ask them why they missed it and is it possible the intake manifold gasket wasn't leaking? They may have misdiagnosed this, but good luck getting that to admit it if they did.
Good Luck