Hey Bharath Kumar,

The top private engineering colleges for good placement  in Coimbatore are,

1. PSG college of Technology

2. Sri Krishna college of engineering and technology 

3. Sri Ramakrishna engineering college

4. Kumaraguru college of technology

5. PSG Institute Of Technology and applied research

Hello Dear

There are few good engineering colleges in Coimbatore for the B.E / B.Tech category like ;

• Sri Krishna College of Engineering and Technology.
• Hindustan College of Engineering and Technology.
• Coimbatore Institute of Technology.

Below the link is given through which you can able to check the list of top engineering colleges which are good for it's placement.

https://engineering.careers360.com/colleges/ranking/top-engineering-colleges-in-coimbatore

All the best