Hey everyone. My LS has been overheating sporadically. I am thinking it could be a thermostat but I'm not. When it overheats I pull over and shut the car off. I remove the coolant reservoir cap and it releases pressure, then the coolant flows out of the reservoir back throught the system. Could this be a faulty cap since this happens sporadically? Thanks in advance : )
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2000 LS V8 overheating
- Thread starter shockme24
- Start date
JohnnyBz00LS
Dedicated LVC Member
If pressure was relieved when you opened the "degas bottle" cap, the cap is probably OK. You may have gotten air into the system and it's trapped somewhere. There is a vent valve on the end of a tube just above the brake booster, open that to allow air out (with the engine warm and running and the bottle cap on to make sure the system is pressurized, otherwise you'll allow air in instead). Also be sure to keep that degas bottle full so air doesn't get sucked into the engine when it cools.