: The best preventative maintenance for my 97 N*?

04-21-09, 11:18 PM
Just wondering what's the best preventative maintenance there is I can do on my 97 Deville to try to prevent an HG problem, before it may happen. Thanks !

04-21-09, 11:49 PM
:thumbsup:Change the coolant as much as possible.

04-23-09, 02:08 AM
^^ yess ^^

04-23-09, 07:30 PM
Thanks guys, just got the car , 80,000 on her, it does have the main seal leak but no gasket leak so I will give the system a flush and refill with a good brand of antifreeze. thanks again for the tip !! Bob

04-23-09, 10:30 PM
Don't flush it. You can't get all the coolant out, thus if you flush, you can't get all the water out so you'll never have a 50/50 mix unless you use a refractometer and keep adjusting. just drain and refill with a 50/50 mix of Dex & distilled water.

04-27-09, 05:34 PM
Will do , thanks Ranger !