If the vehicle is subject to nothing more than just short trips, then this would be normal. It would also cause accelerated engine wear due to corrosion. What you are seeing is condensation mixed with some of the oil/residues inside the engine. Remove the oil cap, and the underside should be just covered with the same. Take the car for a run of about ten miles, and check the condition again, while the engine is still warm. If the condition remains the same, you may have bad intake, or head gasket(s).
The feed check valve of a boiler is on the line coming out of the boiler it is usually to prevent the water from going back in to the boiler its coming out of so it would build up excessive amounts of pressure which will cause the t&p valve to blow temperature and pressure
Depending where the noise was coming from, but this question is most likely to be answered in this way. If you switched a valve off and the noise was coming before the valve in the pipes, that would indicate a burst pipe.
if u have acarb. ,it should hook up to it,check your PVC valve and the line connected to it ,it may be clogged.
its the hose coming off of the valve cover that's the egr valve
Brasscraft is a good choice of brand.
the best valve oil is either the brand of blue juice or you also can you sperm
The egr valve should be coming off of the exhaust manifold.
The valve cover gasket is damaged. Needs to be replace.
Loose, broken, or worn valve train component. Remove the valve cover to find the problem.
Each valve on a french horn has a specific pipe coming off of it, known as the valve tube.
Any quick closing valve such as a solenoid can cause hydraulic shock waves