Cadillac STS-V Series Forum Discussion, Intercooler fill level? in Cadillac V-Series Forums; The filler for the intercooler is in the left rear (facing engine) of the compartment. It is an upside down ...
The filler for the intercooler is in the left rear (facing engine) of the compartment. It is an upside down "T" spliced into a coolant hose. Mine apparently was installed backwards in that the markings for the fill level face the battery and thus cannot be fully viewed, even with an inspection mirror.
So I need help. In the middle of the verticle part of the T the words Fill Level appear. There is an arrow up to the filler cap and another arrow down to the bottom of the T, but I can't make out what these arrows are supposed to mean.
Do the arrows mean the intercooler cold fill level is at the bottom of the T and the hot fill is at the top (cap) level? If not, what is the proper cold fill level?
Park the vehicle on a level surface and turn off the
engine. When the engine is cold, the coolant level
should be at or above the FULL COLD line. The FULL
COLD line has an arrow pointing to it.
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the intercooler fill neck, but only
when the engine is cool. See Cooling System on
page 5-33 for instructions on how to add coolant to the
intercooler fill neck.
How to Add Coolant to the Intercooler
System Fill Neck (4.4L V8 STS-V
If you have not found a problem yet, turn the engine off
and allow it to cool down, then check to see if coolant
is visible within the horizontal tube section of the
fill neck. If coolant is not visible, add a 50/50 mixture of
clean, drinkable water and DEX-COOL® coolant to
the fill neck. Be sure the Intercooler System, including
the Intercooler System pressure cap, is cool before
doing so. See Engine Coolant on page 5-27 for more
What T are you talking about? There is a resivour for the fluid that looks like a break fluid resivour. It can't be installed upside down. You would never get fluid in it in the first place. You must be looking at the wrong thing.
Between the battery and the engine cover there is a T-shaped filler with a screw-on pressure cap. The owners manual says this is the fill spout for the intercooler. The spout is attached by a hose to a coolant recovery tank on the right (passenger) wheel well. I think that is what you are referring to.
^^^^yup that's it.^^^ Slo-Mo-Shun you have to be looking at the low pressure AC line and filler cap. And don't forget to be parked on level ground cause it looks empty if you are parked nose down and over full if you are nose up.
I fought and fought with this, and now if it's half way up that tube while cold, i consider it good. i was trying to get it to stay all the way to the top, and it's just not happening on mine. halfway when cold, hasn't budged except when hot.
Congrats! and thanks. I added in the exact manner the manual specifies. After adding, left the cap off and started the car. Let it run for a couple of minutes. Went down but not much. I was pissed because to get it to even show in the vertical portion of the tube I had to add a decent amount. Anyway, just went for a drive and got back. Checked under the hood and coolant wasn't visible. I'll wait until it's cold and check again and add as necessary. Thanks.