bhai its time to change the compresser.looks like broken ball bearings.
the ac will also take load when it get severe
i had the same problem. i hardly drive with ac, too much load. (same car 97 vti)
i will advise u to go to mozang road . BASHIR CNG.
those guys are experts.they have all the tools,
good service lasts long.
i went to them. they told me that thee are two solultions
get a new one from tyhem or kabli the shop of kabli compressers is just infront
of their shop.
i bought a kabli compresser exactly of a civic 96-98.
compresser for 4500 rs
fiting and AC sercvice 1800rs.
and Mashalah THIS is the 2nd season and the AC is throwing ice cold frosty air with minimum load on the engine.