overheating on 1999 BMW 323i

i had put new serpentine belt&s new idler pulley and expansion tank belt tensioner assembly

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
Number of questions you need to answer before replacing parts.
Manual or Auto?
Cooling fan comes on when AC is turned on?
Thermostat in working order?