Hi guys, this is my first post in this forum ;-) Thanks for reading it!

I own a Morgan 4/4 1948, with a Standard Engine. It was always in great shape and I know the car for 30 years. two weeks ago my new mechanic (since I moved to a different city) did a deep carburetor cleaning, and a distributor overhauling (new cap, wires, rotor, bushings, spark plugs) since I had some misfire. After two weeks I got the car back, I went for a ride and the temperature went up right away :-( It never happened before. I am going to take it back to the mechanic next Monday.

What would you do or check? I am bit concerned......

Thanks in advance!