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1984 Sedan de Ville De Elegance
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119 Posts
Discussion Starter #1
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 !
 

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1999 Cadillac DeVille
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279 Posts
^^ yess ^^
 

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Registered
1984 Sedan de Ville De Elegance
Joined
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119 Posts
Discussion Starter #4
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
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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87,094 Posts
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.
 
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