The Valve That Can Cause Major Engine Troubles - How to Avoid Engine Sludge
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- čas přidán 24. 07. 2024
- In this video I am going to explain to you a valve that when it goes bad, it can cause hard to diagnose performance issues because the symptoms are very similar to a lot of other failure but also if not fixed it can lead to major engine failure as well. I am going to talk about the symptoms it may cause an engine like smoking out the tail pipe, excessive oil consumption, a rough idle, constant oil leaks, oil contamination etc . But I will also share with you how you can quickly and easily diagnose and fix the problem as well.
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Due to factors beyond the control of Ratchets and Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchets and Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchets and Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchets and Wrenches. - Auta a dopravní prostředky
Cheap, and easy to change. People don't talk about it as a maintenance item enough. 👍
I very much enjoyed your video on the PCV valve; it explained how the valve functions in regular everyday terms without getting caught up in the jargon. Nice, simple and it made sense to someone who is not a motorhead. Well done!
This video may have helped me solve my '96 Olds 88 rough idle problem. I replaced plugs, wires, cleaned fuel injectors to no avail. But after viewing this video I hunted down the valve (it's hidden under the MAP sensor) and replaced it. The valve did not move freely. Total cost $3.21! Idle is better and I'm hoping oil consumption will improve too. Thanks!
What kind of noise was it making if any for faulty valve
@@AJ-gc3sk a faulty PCV valve would not rattle when you shake it, meaning the valve is stuck in either the open or closed position
Funny thing is my old man had the 89 olds 88 n he had the same problem and replaced the same things as you did. I was 12 n saw my dad, my brother in law, and my old neighbor sitting in the engine bay tearing out parts. I’m now 41 and have faced my share of rough idle, if I can only go back in time. Lol
@@pprb123 not exactly. My pcv valve did rattle. But not as clean of a rattle when it’s new. Fixed my issue
Sometimes the valve can rattle and still be bad..for what it's worth just change it with original part and clean your Mass Air flow sensor as well.. These 2 are very crucial to optimal engine performance and are soooo overlooked even by experienced mechanics...make these a part of your routine preventative measures along with on time oil changes, throttle body cleaning, air and gas filters changes..RPM is soooo crucial to these newer piece of crap GDI engines..
Did not know about the dipstick popping out. Mines used to be doing that. Had a major oil leak also. I definitely learned something new just now
Thank you for the video and great explanation. My husbands truck hasn’t been sounding right on the highway. I drove it yesterday and the “low oil pressure” light came on and then went right back off. I decided to check the oil- ZERO oil on the dipstick. Did some research and tested the PCV valve, zero suction. Waiting on hubby to bring me the part- I’m just hoping no damage occurred. I had no previous knowledge that something so simple could prevent major issues
Great video! My 04 Silverado 1500 z71 had a PCV get stuck open. It was pulling oil though it into the intake at around 2qts per oil change. Once I finally learned about it, I found GM revised the valve cover due to the original design causing major failures. I wish I knew about the PCV system earlier.
One of the first thing a young car guy learns about is how a bad pcv can muck things up and cause problems that aren't always easily discernible. Thank you for the full and clear explanation. Always glad to learn new things from your channel.
true. learning to clean it. spraying into it. let it dry. wipe and shake if hear the ball rattle it's 👍 a. ok. amateur stuff.
Thank you so much for the explanation of the PCV valve, I usually do all of my own work but my wife’s car is still under warranty so I let a garage (warranty approved garage) work on the car idling bad at stop and stalling a little while going down the road. They told me it was the left side valve cover gasket letting oil into the intake. I had to see if this was correct. Through your video you explained how this can happen. They should have just told me the PCV valve though. I really like your page and very detailed for us DIY’s out here.
You're a car genius and very good at teaching and explaining how cars work!!! I really appreciate you. Keep up the good work!👍
I agree. He should like your comment. I dont like rude youtubers. Even if video is old.
Gotta love your engine videos like this one, there's nothing better than your clear thinking explanations.
agreed, one thing tho, dont wear glove when doing the testing with your thumb like at 8:05
@@nicholassage2076 why?
Replaced on 70s 302 Ford pickup. Fram. Ran lean backfired up carb. Always use factory part. Genuine Ford valve fixed.
Great explanation on PCV valves.
At 120,300 miles I replaced the water pump (weephole leak) and drive belt on my 2018 Civic EXT. Since Honda service were already working on that I had them replace the PCV valve as preventative maintenance. Aside from an earlier AC Condenser replacement (fully covered under Honda extended warranty), the water pump, drive belt, coolant flush was the only major work on my four-year old Civic (Total cost: $1,045.00). Currently averaging 34.1 mpg. Great car.
This is a great vid. The symptoms matched unexplained problems on our RAV4. Turns out this is a common problem for that car. Thank you for your videos and how you demonstrate and explain. Like your style.
This is great information! i have the very symptoms you mention, and its only a $10 fix- and requires no tools!!! I’m pulling no codes, but there’s gas smell in the oil, a new oil pan leak, and a new valve cover leak, and i feel like performance could improve slightly. THANK YOU! /2002 Lexus RX300
Just found your channel. My only complaint is that I didn't find it sooner! Rock on man!!
Great Video as always!! The only thing is try not to use gloves when checking the vacuum on the pcv. I had a small piece tear off and suck through my pcv valve. The force was strong in my truck!!
I'm glad you touched on a subject that is rarely brought up! This is why I subscribed. Those birds need to chill out! Thank you for this video and happy wrenching!
good explanation of the PCV and a very important part, this to reduce pressure inside your engine and burning the blow by for cleaner air.
Very nice good thoughts
simple but very important. I've seen them look like brown greasy mud inside.
Sir, your mechanic aptitude and teaching style is above all , Thanks 🙏
These videos are great for solving simple problems that otherwise would be by mechanic and automotive shops that would replace the $25-50 part but charge you for a pile of "OTHER" works they didn't really do.
Love your videos. Excellent work. I learned a lot from you than in my entire engineering. Thank you so much!!
Incredibly helpful, I have changed one on my JEEP in the past which was really easy but I seem to have the only Audi were there isn't any pcv or reference to a crankcase breather so it's a bit of a nightmare, even with a Haynes manual
That’s a really good explanation of the pcv system -two thumbs up from me 👍 👍
I got a callapsed PCV hose on my 99 Ford Focus, I got the car on the cheap and the garage had just replaced the rocker cover gaskets and the rocker seals. I then had to replace both main seals and the sump gasket has now sprung a leak... This hose has essentially required me to replace all the main seals... It makes sense to spend £50 to replace everything PVC related once in a while!!
Great video, thorough, clear explanation and thoughtful use of additional media tools!
Probably the best PCV valve video i have seen so far. Thanks
This explains why I keep have so much oil leaks in my 98 civic, after replacing several gaskets and seals!
I like your videos as they are always informative, interesting and to the point so I always come away with having learned something.
Very informative. I got a new pcv valve as my truck is consuming oil but no smoke coming from the trail pipe. It has a bit of a rough idle every now and then so I'm thinking check valve first. Love your videos. Keep up the great work!
Did the pcv valve fix it having the same issue
Very detailed video with both stuck closed and stuck open symptoms. Very nice video!
I had an issue with a 01' Firebird. I was fixing everything on it trying to figure out the issue. Went as far as a doing a complete head gasket replacement. It wasn't until I was putting everything back together that I noticed how nasty the intake manifold was. Yep it was a damn 5 dollar pcv that was causing the biggest of the issues. That said it was good to do the complete head gasket replacement as it was 160k and looked like it was starting to go. I swear it gain back a few ponies as I also polished the valves and heads.
Very good video,this little overlooked piece of plastic and sometimes metal can really cause a lot of problems,i had this car one time and everytime i stopped at the light i could see smoke coming from my hood,not bad mind you but it was there.
I could also smell a horrible oil smell (it was horrible and I'm a mechanic and shop worker,bad oil smell's dont normally bother me) and all of the sudden my car developed a few oil leaks out of nowhere,i decided it was time to start troubleshooting,i got all the way laying in my hood looking at the back of the engine with a flashlight,this valve was waaay in the back buried,the valve had popped out while i was doing some unrelated maintenance unbeknownst to me, the oil smell was coming out of the hole, the smoke was from hot oil leaving the hole and the oil leaks was from the crankcase not getting the proper ventilation which is a job this valve does,major problems over a 10 dollar part.
Thank you for these tips! Your always giving great advice and very detailed information! 👍
Excellent as always keep them coming buddy you are one of the best.
thank you so much i really like the way you explain everything no wonder i have oil gasket problems
This is the best PCV valve instructional video I have ever watched. Good job man.
Excellent video and explanation. One problem innerent with the PCV is the oil move inside the valve to the intake manifold with new or old valve. I stop that with an Oil Can Catcher.
Ive been lucky enough on my vehicles over the years, the PCV valves are easily accessible. When i do my oil changes, i remove the valve and spray a little carb cleaner in there to flush any residue out. Havent had an issue with one yet...
Great explanation of the PCV system.
Thanks for the tip , HONDA V6 pcv valves go for $25 - $30.00 , and there's 3 Honda's in my family.
@@johnlopez3001
No worries!
No point in spending extra money.
Go ahead and flush them out at every oil change.
why carb cleaner and not brake cleaner
Get a Toyota, the pcv valve is super accessible, and it didn’t even cost 5 bucks for oem pcv valve😜
Excellent video!!! Your very much appreciated!! This explains the sudden oil leak from everywhere! I just replaced the DPFE sensor last week. I can't see that it changed anything by doing so. Now I wonder if my old Ford is savable? It's like over night EVERYTHING went all to pieces on it. Literally.
Thanks for the detailed explanation on the pcv valve. My 08 enclave has had major oil consumption and smoke when I accelerate hard.
Keep these videos coming..ur the best at xplaining ..God bless you..
I always knew to change it on a tuneup but now I know why. 👍🏽
On competition engines there are are breather filters on top of the valve covers to vent the pressure. The filters are there to prevent debris from entering the engine but not to obstruct the vapors coming out of the engine. These vent directly to atmosphere. It is very important to not let the vapors build up pressure in the engine as he mentioned.
A breather filter takes in fresh air. The pcv valve dumps the vapors into the intake plenum
Glad didn't wait too much longer, had to order mine in when i picked up a oil gasket for my work truck
Nice tutorial. If I may add:
I was thought that the main reason for the spring operated valve inside the unit was to prevent flames from backfired carburetor to go back and ignite the air fuel mixture in the crankcase.
In old engines with carburetors, a backfire flame can travel through intake manifold through the hose back to the valve cover and down to the oil pan area. Thus, the name Positive Crankcase Ventilation valve. Otherwise a one-way valve.
Before PCV valves on engine, there was a draft tube that vented the unburn air and fuel mixture to the atmosphere. This produced smog.
With fuel injector systems on cars, there is very little if any chance of backfire. There is still a need to remove unburned air/fuel mixture from the crankcase.
A small spray of carb cleaner can go a long way to keep the valve working.
Omg Great Video 👍🏻 another test is to hook up a small vacuum line to the PVC and create a vacuum effect , this way you can hear and feel it working .
thanks so much, i just learnt how to check my PSV functionality.
Ive watched 4 videos 2 were for painting and 2 were for taking care of your car and you make me wanna become a mechanic . I'm also 3 80 proof mixed elbow grease drinks deep so I could just be hyped up to learn lol
Great info! Never heard Scotty screaming about it LOL. Was worried that my engine is about to blow, because the car is old, but since it has an Ecotec engine it should be fine. Thanks again!
Wonderful explanation. At this point, the better explanation for a PCV. Thank you! Not to sound sarcastic, but I learned based on how you test them (which makes sense) I have wasted about $8-10 replacing this valve needlessly. Thankfully though, they are cheap!
Love this video I found it super helpful. You are easy on the eyes too. 😊
Perfect explanation of the PCV valve and it's purpose.
Part of the scheduled maintenance on that dodge is to clean the pcv hose and orifice into the intake when you replace the pcv. On my truck the hose and orifice was clogged with sludge
Great video thank you! You really show with good direction how things work
I really love how you explain everything. Even an old lady like me gets it!!!!!
One of the best in youtube.thanks a lot for a very helpful videos.
I just bought a PCV valve today and this video got recommended 😂👍
They know every move we make🤪 tech companies are worse than communist dictatorships in regards to data information
Thank you so much every thing I learn helps with this car of mine!!!
I’m currently changing my engine out and while I was tearing down my old engine I heard something hit the ground and I had no idea what is was just turns out to be the exact thing you’re talking about in this video weird that it popped up in my recommendations but thank you!!!!
Google is watching you...
You’re awesome, I think this is the problem I have in my car for a misfire
This is the best explanation video for the pcv Valve! Tha k you soooo much for this video
You really explain things well. Much appreciated.
I’ve had a PCV valve fail in a 1.5 ecoboost. There was a crapload of oil inside the PCV valve. It caused ringland failure in cylinder 2. Had to replace major engine components, but good thing its still under warranty.
Great video man. Learned a lot. Subscribed
If you lived in South Texas I would take my 1998 Ford Ranger to you.
I love my little truck but have several issues with motor. Too many to list. Good video and good information.thank you for taking time to explain.👍👍👍👍👍
Great video,,,, On carb engines it also keeps a Lean backfire from blowing seals out of the engine by it blocking pressure to the crankcase. EFI rarely if ever backfires from a Lean mix.
The best PCV explanation on YT
Ure videos r awsome, straight to the point well explained and easy to understand, keep up the Good work 🙏God bless
I just went through this same thing on a '98 Ford Contour 2.0. On this one they made it where it's really difficult to get to. It is not on a valve cover it is in the crankcase, under the exhaust manifold. There's no way to get to it without removing the e manifold. The valve cover vents into air intake. Repairing both, valve was clogged, now working and the other hose from the valve cover was rotted. It still has crankcase pressure. At idle remove the oil fill cap and it feel it blow out a lot of pressure. Seals are leaking, they stopped for awhile when I repaired pvc system but pressure is back. And, as you said, vacuum only happens at idle, I can only imagine the pressure get worse above it. Told this customer it a goner.
Your demo will be soved my problem ... Thanx & Rgds...
I always liked that particular model of that truck. When it came out, it looked like a Mac truck. Nice video.
Another overlooked item is the differential breather valve that releases the pressure inside the differential if it gets plugged up it blows out the seals from your axles
I like watching and learning from all of your vids.
Good evening family and thanks for the valuable information and for your time 👍🏼 👍🏼🙏
Thank you for all your videos, they are great.
Excellent video, thank you very much. We should learn this very useful things in school.
Very clear explanation of the PCV valve 👍
Wonderful advice! Worth remembering! Thanks.
Great, informative video! My car smokes on deceleration only and I thought that the PCV valve could be the culprit, so I replaced it with a new one. However, that did not make a difference. The engine in the car was professionally rebuilt three years ago, so I wouldn't think that there are worn out piston rings yet... I attached an oil catch can in the line that connects the rear valve cover to the intake manifold, but it hasn't collected almost anything in two years. I also rebuilt the turbos last year, so they shouldn't be causing the problem either. Could you please provide me with some clue as to what could be causing this smoking on deceleration? My car is a '95 Mitsubishi 3000GT VR4. Thanks in advance!
You just solved my problem thanks for the video 👍😎
Cleaned and sprayed out my PCV on my 2002 Yaris 87.000 miles and was easy to get to.get off and wasn't that bad/dirty but did needed to be done...preventative maintenance folks.
Great visual explanation video. Thank you..
Great video and explanation, thanks very much.
good explanation additional good idea thanks for video and keep the good work good health and goodbless.
This is why predominantly they make this simple and essential part the biggest pain to get access to.
Tell me about it - on my Honda I'm going to have to remove the intake manifold to replace it. I can scarcely even SEE the thing normally!
I appreciate your time and video!! Very helpful! 😊😊💯%
Great explanation and demonstration.
Another great vid, thanks man !!
It’s a gift. Great instructor
I rebuilt my first engine by myself top to bottom in 1969 as a 14 year old. it was a 1954 272 Y-block Ford. Worked as a heavy equipment mechanic for over 31 years for a local municipality 9 years as a shop supervisor. I learned hands on rebuilding and repairing things not replacing them from old timer's who knew more than I could ever fathom learning but they taught me all they could including welding, machining and fabricating. I was a good student and a fast learner. Attended an automotive tech school for four years. Could have been a teacher. Was NAISE certified in every phase. None of my mentor's ever gave much thought to the PCV positive crankcase ventilation system even on engines that were not taken care of. In my 40 plus year career I never found a stuck or malfunctioning PCV valve or suspected one of causing a major engine or component failure. Yes compression can sneak by the rings on older engines as well as new one's and cause some blow by and slight pressurization of the crankcase however in order for that much pressurization to occur it would blow out a seal or a gasket first. I do know if a PCV valve is stuck in the open position it can suck in engine oil and burn it along with crankcase vapors through the carb base however all factory valve covers have a baffle that covers the small place where the PCV valve lives protecting it from engine oil slung up from the rocker arms. So in theory even one stuck open would not cause an excessive oil consumption issue. Aftermarket valve covers often lack that little protection for the PCV and an oil consumption issue could arise. Since a PCV has full manifold vacuum to it that can be a starting place to look for an engine performance problem such as a rough idle. No two mechanic's agree 100% 0n everything. Most agree to disagree.
Great info, you're my guiding light
Great stuff, thanks the information.
Most overlooked simple part.
Sometimes not so simple, some Volkswagens have the PCV built in the valve cover >.
This is why German cars are expensive to repair/service.Avoid German cars as they're rip offs!
@@tardeliesmagic Volvo is the worst ever...overly complicated that translates into huge rellacement costs.
@@Darksyne honda is right on the top
I will replace mine just incase. Just bought a used car.
Very helpful for my understanding!
Very good presentation! I will watch you more!!!!!
Very informative, thank you!
Can you make a video on oil catch cans/ remote breathers for the PCV system especially for gdi engines? Thanks Ratchets
The shaking it to see if it rattles test isn't always accurate to see if the pcv valve is still good. Mine rattled like the new one I bought but was bad. Great video though, very informative.
Great Vid as always bro Thank you!! If PCV Is stuck opened or closed would that also change fuel trim??
Well explained, thanks.