Big Fork Drivers: Is It Time To Replace Your PCV Valve?

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Improved fuel economy has two benefits for Kalispell motorists: less fuel is necessary and fewer emissions are released. Big Fork cars and trucks run cleaner than ever. Kalispell motorists may not realize that the first federally mandated pollution control device came out almost fifty years ago.

MT car owners that were around in the early 60’s may remember that the PCV Valve came out on 1964 model cars. PCV stand for Positive Crankcase Ventilation. Big Fork Drivers: Is It Time To Replace Your PCV Valve?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 fuel is burned in the Subaru 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 dangerous 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 Kalispell.

Enter the PCV valve. It’s a small, one-way valve that lets out the 
harmful 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 harmful air out. As you can imagine, however, the valve gets gummed up over time.

Big Fork drivers that skip oil changes now and then will notice that the PCV valve gets gummed up even faster. If the PCV valve is sticking in your Subaru, the gases won’t circulate as well, leading to increased pressure in the crankcase. That, in turn, can lead to oil leaks. Fortunately, the PCV valve is very inexpensive to replace at Loren’s Auto Repair in Kalispell. Some can even be checked by your professional and courteous Loren’s Auto Repair advisor.

Your Subaru auto makers usually recommend they be changed somewhere between twenty and fifty thousand miles. Unfortunately, PCV valve replacement is left out of some Subaru owner’s manuals, but at Loren’s Auto Repair, we will make sure your PVC is replaced if needed.

All of us Big Fork car owners can do our part for the environment. Watch that lead foot, stay on top of our critical automotive maintenance and don’t forget to replace our PCV valve.



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Steve Waatti
Steve Waatti
17:44 05 Apr 18
Best Shop in town. Very clean and well organized. No extra BS charges or anything fishy. Full vehicle inspections with oil changes. Very knowledgeable crew. I bring all my personal and company vehicles to Loren's. Highly recommended.
Ricky Chevy
Ricky Chevy
21:04 15 Jan 18
Excellent service!! We are from Wisconsin and found Loren's on the web. They were able to fly in a new front axle and get us on the road in just 3 days at a very reasonable price. A quick follow up visit for adjustments allowed us to continue our vacation as planned. Absolutely recommend them. Mark was personable and knowledgeable, they offered a shuttle service and John was a great technician for our Xterra!!
Hallie K
Hallie K
02:04 06 Jan 18
This was the best car repair shop I have ever done business with. For being a young woman, who honestly doesn’t know a ton about cars, they were very thorough in explaining things and I trusted that they weren’t trying to rip me off based off my lack of knowledge or me being a young girl. Too many times have mechanics/car maintenance men try and rip me off. Once someone tried to charge me $180 for an oil change! Ridiculous. But not with these guys. They were awesome. My car broke down at a horrible time when I was busy with work and about to go on vacation. I had my car towed there and didn’t have time to stop by. They inspected it very soon after that, and got ahold of me. Then I was out of town for a couple weeks and they let me keep my car there. Even when I got back they had put it in the shop the night before so all the snow would melt. They were very friendly and even have a complimentary shuttle service when needed. I wish I could give the names of all the people who helped! Chad was awesome and answered all my questions and my dads when he called from a state away haha! The young girl who picked me up from the shuttle was super nice and has good people skills. If I ever have car problems again they will definitely be who I go to. Thanks guys!
Monica Taylor
Monica Taylor
21:37 08 Nov 17
Lorens never disappoints! They continually meet above my expectations. They met competitive rates, they have been upfront with charges and even gave me a loaner vehicle while doing their repairs. I will only ever use this shop. Mark at service desk is amazing and very knowledgeable!
Erika Myhre
Erika Myhre
14:03 29 Aug 17
I'm out here in West Glacier on vacation. During the trip, we hit a pothole and the exhaust started making a loud noise. We figured a hole had rusted open or something similar. We called Loren's Auto Repair to get it checked out, and they were awesome with recommendations. They let us explain the issue and then confirmed what we thought it was. They weren't able to get us in before we left, but they were kind enough to suggest a mechanic in town that possibly could squeeze us in. This conversation was a sign of trust and good business. The prices they quoted were fair and had excellent customer service. Thanks!
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