Saginaw Drivers: Is It Time to Replace Your PCV Valve?
June 25, 2023
![]()
The crankcase is the lower part of the engine where the crankshaft is housed and where the engine oil lives. The crankshaft is connected to the pistons that power the engine.
When you are diving around Saginaw, fuel is burned in your vehicle engine, it pushes the pistons down and the crankshaft rotates and sends power to the transmission. Some of the explosive gases from combustion squeeze past the pistons and down into the crankcase.
Now this gas is about 70% unburned fuel. If it were allowed to remain in the crankcase, it would contaminate the oil and quickly turn it to sludge. Sludge is like Vaseline and clogs passages in the engine, leading to damage.
Also, the pressure build up would blow out seals and gaskets. So in the old days, there was just a hose that vented the crankcase out into the air. Obviously, not good for our air quality in Saginaw, TX.
Enter the PCV valve. It's a small, one-way valve that lets out the gases from the crankcase and routes them back into the air intake system where they are re-burned in the engine. Fresh air comes into the crankcase through a breather tube. This makes for good circulation in the crankcase. And that gets the air out. As you can imagine, however, the valve gets gummed up over time.
Your vehicle manufacturer usually recommends they be changed somewhere between 20,000 to 50,000 miles/30,000 to 80,000 kilometers. Unfortunately, PCV valve replacement is left out of some vehicle owner's manuals, but your friendly service advisor at Kwik Kar Saginaw, we will make sure your PVC is replaced if needed.
Kwik Kar Saginaw
1216 S. Blue Mound Rd.
Saginaw, TX 76131
817-231-1700
http://www.kwikkarsaginaw.com
Need Service?
More articles from Kwik Kar Saginaw

Lubricate Driveshaft
April 26, 2026
See if any of these are happening to your vehicle. You feel it vibrating excessively underneath when its running, or you hear strange clunking, grating, or grinding sounds coming from beneath. Maybe its hard to turn your vehicle, or you can hear squeaking when youre going slow. Perhaps you fee... More

Snake in the Engine (Serpentine Belt)
April 19, 2026
There's a belt that snakes through your engine. It's even named for a snake, the serpentine belt. It'll bite you when it breaks, possibly leaving you stranded. So, it's good to know a little about this snake-like belt. In early engines, there were lots of belts. They were used to convert the ... More

Light Up your Life (Headlamp Replacement)
April 15, 2026
Did you know that having a burned out headlight can result in your rearview mirror reflecting some flashing lights? In other words, you might get pulled over by the police for only having one working headlight, because in most places it's against the law. Not only is it illegal to drive with on... More
