Cadillac 2008 STS Automobile User Manual


 
1. Remove the Intercooler System pressure cap when
the Intercooler System, including the upper
intercooler hoses, are no longer hot. Turn the
pressure cap slowly counterclockwise about
one-quarter of a turn. If you hear a hiss, wait for
that to stop. This allows any pressure still left to be
vented.
2. Then keep turning the pressure cap slowly, and
remove it.
3. Add the proper DEX-COOL
®
coolant mixture to the
fill neck, until the coolant reaches the COLD FILL
line on the fill neck.
4. With the Intercooler System pressure cap off, start
the engine and let it run for a couple of minutes.
Then turn the engine off. By this time, the coolant
level inside the fill neck may be lower. If the
level drops to where coolant is no longer visible in
the horizontal tube section of the fill neck, with
the engine off add more of the DEX-COOL
®
coolant
mixture to the fill neck until the level is again
visible in the horizontal tube section.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
If the coolant is not at the proper level when the
system cools down again, see your dealer.
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