Boiling sound when turning off car
Asked by Lpfreek2169 Jan 23, 2018 at 01:34 AM about the 1999 Toyota Camry LE
Question type: Maintenance & Repair
I just replaced my timing belt, water pump and oil
pump on my Camry. It was overheating and the
belt seized. It's been about 4 months since I've
gotten my back and when I turn my car off I hear a
boiling sound coming from the coolant reservoir. It
doesn't over heat.
3 Answers
It may not be overheating yet, but it's clearly running hot if you hear a boiling sound. Have the cooling system checked out. Hopefully it isn't anything as drastic as a blown head gasket. A product called "Block Tester" can check for the presence of hydrocrabons in the coolant, which would indicate a head gasket.
Lpfreek2169 answered 6 years ago
Ok, that is something I will have checked out. I forgot to also put that egr valve is bad, can that have anything to do with it?
A bad EGR can contribute to overheating, especially in vehicles with an EGR cooler. By burning spent exhaust gases in the combustion chamber along with outside air, the EGR decreases the amount of NOx produced and lowers the temperature of the combustion chamber. The cooler lowers the temperature of the recirculated gases even further. This only happens when running at higher RPMs and the EGR valve is open, usually at low RPMs and startup the EGR is shut. A bad EGR would also cause some performance issues and rough idling, so it is well worth fixing. A bad EGR and/or cooler could also be causing overheating too, although you would want to check the entire cooling system as well.
