Dear Scotty,
My car is a Honda CR-V G2 K20 engine. In recent time, my car engine is getting too hot and rubber melting smell comes out of engine room. Yesterday I also heard strong sound of water boiling in expansion tank, so I loosen it a bit. Most of my engine cooling components are new and replaced within 1 year. The valve, radiator, hose pipes, etc. The overheat light doesn't come out yet.
One symptom to mention, I found engine oil mixture in the coolant water. I am not sure what to check.
One more point to address, my previous mechanic did a very job clogging up one of the spark plugs, so it doesn't come out anymore. Perhaps, I have to change the valve cover next. But regarding the overheating, can you suggest, what should I check?
Thank you in advance.
I found engine oil mixture in the coolant water. I am not sure what to check.
That's your smoking gun, along with the other symptoms. You have a blown head gasket or cracked cylinder head.
Perhaps, I have to change the valve cover next.
Why? Of course the valve cover will have to come off to replace the blown head gasket and check the cylinder head for damage but replacing the cover alone is not going to help the situation.
@chucktobias Can you please explain about "Smoking gun". I am not familiar with this part yet. Couldn't find on the internet too.
@mainul "smoking gun == "strong evidence" - As in there's really no other way that engine oil would get into the coolant.
@chucktobias can you please tell me, how can I clean up the engine oil deposit inside the water cooling system before replacing the current engine with a new one. I am taking this decision because I think this engine should go for retirement. If the engine oil deposit remains inside the water cooling system, how bad will it be?
The coolant needs to be drained, same with the engine oil, replace head gaskets or cracked cylinder head, etc.
Automatic dishwasher detergent works.can you please tell me, how can I clean up the engine oil deposit inside the water cooling system before replacing the current engine with a new one
how can I clean up the engine oil deposit inside the water cooling system before replacing the current engine
You should be able to flush out the radiator and heater core with a garden hose.