I have a 2014 Chevy Cruze 1.4 LT with a turbo. It had a check engine light on so I got the codes read and figured out the problem. The problem was the air intake from the PCV valve cover. So I ordered one on rock auto and switched it out. Then I noticed a massive oil leak in my car that wasn’t there before. It was coming from the valve cover at certain points. I went to go tighten the bolts, but they were loose. I initially thought the valve cover was broken so I ordered a new one. Once I tried to do the procedure again, the same thing happened. I then looked and saw that 2 out of the 15 screw holes had no thread, and those are the areas that it’s spraying oil from. I tried to rethread them, it didn’t work, I tried putting epoxy on them, it didn’t work. It only sprays oil when I drive and it’s a violent spray all over my car. I am thinking that the oil is pressurized to much and it busted those screw holes. How do I get the oil pressure to come down and how to I seal up my valve cover?
I am thinking that the oil is pressurized to much and it busted those screw holes
It would require literally TONS of pressure to rip threads, which is absurd.
The oil inside engine top end just trickles and splashes around freely, and then drains down under gravity. The oil there is not under pressure. The cover is mostly empty space. It is NOT filled with or submerged in oil.
How do I get the oil pressure to come down
You don't. Unless you've measured the oil pressure with a gauge and it's something crazy, and the pressure relief valve somehow failed, then you're barking up the wrong tree. This never happens.
Obviously, you need to fix the threads. Either you repair the threads with helicoils or timeserts, or you replace the heads.
The reason oil is spraying out is because there's a buildup of gas. A little bit is ok, but if your PCV is clogged, then it's no venting properly, or you have too much blow-by from a worn out engine.
@imperator ok so I have replaced the PCV valve cover, which has the PCV valve in it. I have tried 2 different valve covers, with the same result of the spraying. Is there something else I should replace that could be causing the clog?
With all this concern over oil pressure have you hooked up a mechanical oil pressure gauge to verify what your actual oil pressure is?
the same result of the spraying
it's going to leak regardless until you repair the threads.
Is there something else I should replace that could be causing the clog?
The hoses.
How many miles on the car?
You could check for cylinder blow-by by performing a compression test.
@imperator It has about 90,000 miles on it. After doing some research it may be the hose connecting the turbo to the PCV valve. I took it to pep boys last week (what a waste of time) and they said the dipstick was pushed out, but I never took it out that day. It doesn’t smoke very often and when it does it’s very light white smoke from the hood. My conclusion from that is the oil sprayed on a very hot part of the engine and it just smoked up a little. Should that be more of a concern?
all I know is that you need a better mechanic than pep boys
I have really high oil pressure in my engine. I had some busted screws in my valve cover because of it. I just changed my oil, PCV hose, changed the oil filter and patched up the holes. I haven’t driven it at all since changing everything. Is there anything else I should change before driving it? I am getting really nervous that my car is going to like explode. (I know it’s not but my anxiety is like “it could happen”) please any advice is helpful!
You asked about this back in April, and received some responses. Please take note of the following in the forum rules. Thank you. (Topics merged.)
