Time to change the coolant.

I went by the local garage to inquire about having them do the job, as
I'm a bit crippled up for the time being and it's difficult getting down
and under.

 The mechanic said they have a vacuum coolant changer whereby they draw
out the coolant and then backfill with fresh coolant. Said it would take
about 10-15 minutes, start to finish. The vacuum created in the system
draws the new coolant back in without introducing air into the system (
yeah, right!!!) Supposed to clean the radiator in the process.

Anybody ever seen this done, or had it done. I'm hesitant.

Any feedback on this pro or con would be appreciated.

Regards,

John Rodgers
88 GL Driver