PCV Valve OEM or Aftermarket

[Blinker]

The last time I bought a pcv valve for one of my old Chevy TBI’s, the dealer part was just a reboxed part BWD part that could be found at virtually all auto parts stores.

 

[SatinSilver]

Oem, the weird thing with 05 Matrix is there were two different ones available and of course received the incorrect one. Dealer said to try the one they had in stock and if it didn’t fit they would order the correct one.

 

[AutoMechanic]

Intermotor is SMP (Standard Motor Products), many times they rebox OE as in the case as the ones for Honda J35 for example so you may just have an OE unit installed and don't even know it.
Some engines are very finicky when it comes to the PCV valve eg old ecotec with the PCV with it mounted inside the intake, being a obsolete part guys were using ones for a later model that had a slightly larger orifice size. This caused a slightly higher misfire count on all cylinders and a slight shake at idle, not enough to trip a CEL but still there. With the correct one it was zero.

Guys that have them don't want to part with them so they are hard to find and there is no aftermarket not even a bad one.

That’s good to know that. When I got the truck the original 30 year old one was pretty much not functioning at all when I took it out the ball that is in there was stuck completely.

 

[Drew7a]

So from the looks of it a large majority prefer/use OEM.

I need to figure out a away to cleanly cut open PCV valves for comparison purposes. It would be interesting to see the difference in passage sizes and "ball" sizes, and quality of construction. Similar to what is happening with oil filters.

One a side note anyone change the PCV on a 2.7L 1ARFE Toyota?

 

[Trav]

https://workshop-manuals.com/toyota...tion/service_and_repair/components/page_3664/

 

[AutoMechanic]

I’ve replaced one it’s been awhile though.

 

[Fsharp]

If the OEM is so good, why does it need replaced? I will use OEM if I’m making rock auto order and they’re cheap. Otherwise whatever the parts store has.

 

[DGXR]

How often am I replacing the PCV valve? About once every 100,000 miles, maybe longer?
Use OEM here.

 

[Trav]

If the OEM is so good, why does it need replaced? I will use OEM if I’m making rock auto order and they’re cheap. Otherwise whatever the parts store has.

Seriously?

 

[Yah-Tah-Hey]

OEM

 

[bdcardinal]

I almost always do OEM. I have had issues with aftermarket ones in the past and just don't want to deal with it anymore. Plus a lot of the Ford ones will come with the hoses they are attached to, so that makes it even better.

 

[miden851]

OEM plastic parts are the best; also it depends how difficult is to replace; OEM for sure

 

[Drew7a]

https://workshop-manuals.com/toyota...tion/service_and_repair/components/page_3664/

Thanks Trav!

Wow remove the intake manifold to replace a PCV.
I wonder why some service manuals are free online and others are not?

 

[Gimpy1]

With emissions or driveability related stuff, O2 sensors, IAC, thermostats, PCV, EGR, etc I find that OEM is best. I've had too many driveability issues or CELs that its simply not worth the hassle, especially since this is a perfect case of you get what you paid for.

 

[BMWTurboDzl]

Genuine BMW.

The valve is integrated into the valve cover in order to significantly reduce carbon buildup. Consequently my engine (designed in late 2000''s) does not have running issues due to carbon buildup.

 

[71Chevyguy]

I had an interesting experience with a PCV valve once. I had a Saturn SL2 which is known for burning oil. When I got it, I installed an aftermarket pcv along with other maintenance items. Car ran great and did use some oil but not too excessive. After many miles I decided it was time to change it again because I was giving the car to my parents and wanted most things fresh. It went from burning a quart and half or so in 3,000 miles to almost nothing. I guess it does make sense now looking back, but I never realized it could make that much of a difference. My parents had the car for about two years and gave it back to me after that. It still wasn't using much oil and was at over 150k at that point. It was an odd looking PCV valve and had the top part molded into the whole thing. The aftermarket one was two pieces with the valve and the angled neck that popped on top. Since then I always stick to OEM. In all honesty, I have not had much luck with many aftermarket parts lately regardless of brand. It is sad how low the standards have gotten. When you have an older vehicle, sometimes what is available is all you can get, all from China.

 

[Falcon_LS]

OE only, nothing else.

 

[Lubener]

I had problems with aftermarket PCV valves on two different Ford E-150 vans with the 4.9L I6. Both started using oil soon after replacing the PCV valves with aftermarket parts. I ended up tossing them and went with Motorcraft and oil use stopped. I will only use OE for PCV valves as a result.

I was getting oil backing up into my breather filter and the breather line would eventually blow out of the valve cover the last time I used an aftermarket PCV in my 4.9L I6. It stopped when I replaced the valve with a Motorcraft.

 

[ms21043]

If you need a tuneable high quality pcv valve, OEM won't cut it.

http://mewagner.com

 

[demarpaint]

I was getting oil backing up into my breather filter and the breather line would eventually blow out of the valve cover the last time I used an aftermarket PCV in my 4.9L I6. It stopped when I replaced the valve with a Motorcraft.

Interesting issue. I've owned something powered with the 4.9L engine since late 1983, and I still do. They've been in my possession for 38 consecutive years now. It's a great engine, and one as you know must have an OE PCV valve. There are several other vehicles that don't bode well with aftermarket PCV valves. Also when it comes to sensors I go with OE as well. I tried an aftermarket O2 sensor on one of my 4.9L Fords and had problems with that too. Another lesson learned.