On my 02’ 3.9 v-6 powered 2wd dodge Dakota. PCV valve on passenger side valve cover. I see an oil stain in that general area Betting it could cause my oil consumption.
Would a clogged PCV valve cause oil consumption?
- Thread starter 53' Stude
- Start date
yes
If the valve is defective now due to sludge, it’s likely the oil drain-back holes in the heads are clogged with sludge. Then oil gets sucked past the valve seals, valve guides, and into the cylinders. Pull the valve covers and dig it out.
Yes, replacing or cleaning PCV valves is part of maintenance. They should be cleaned with carburetor cleaner, or better to replace. You will hear a rattle when you shake it. That will tell you if it's WORKING, not necessarily clean though. Clogged PCV valve or collapsed PCV hose will cause an increase in engine pressure, leading to leaks, sludgy engine, oil burning. They should be cleaned a few times a year, along with throttle body cleaning ( if equipped with one ). CRC makes a good throttle body cleaner, Helps smooth out rough idling. I use some scotch brite pad to gently clean the throttle plate seating area, the hardest to clean with CRC alone.
You shouldn't clean a plastic part like a PCV with carb cleaner. If you must clean it use something rated for plastic parts, like a connector cleaner or something. There really cheap enough to replace.
I haven't cleaned any of my TB's in years. I used to, seemed to be a big waste. Maybe engine dependent? To each his own.
Absolutely. Change that thing out ASAP.
https://www.rockauto.com/en/catalog...sitive+crankcase+ventilation+(pcv)+valve,5052
Check the hoses going to/from the PCV. Cheap enough to buy at same time on RA. I would change it all.
https://www.rockauto.com/en/catalog...sitive+crankcase+ventilation+(pcv)+valve,5052
Check the hoses going to/from the PCV. Cheap enough to buy at same time on RA. I would change it all.
If we didn't know you better, with 10 years and almost 35k posts, I'd be on the 1st time poster, AI Chatbot fence of newb questions.
Check you virus software, you might have gotten hacked.
. After that change the PCV but be sure to post pics of the old one AND do a C&P so we can see how much junk is in there.
Check you virus software, you might have gotten hacked.
. After that change the PCV but be sure to post pics of the old one AND do a C&P so we can see how much junk is in there.I have a VW Tiguan,on their forum we are discussing where the pcv and oil separator build up so much pressure a gasket starts to leak.Its 300 for the valve,800 for the gasket at the dealer.VW doesn't mention it in the manual.I have 70,000 on my 2019,I just had my valve changed and the gasket area cleaned up.Get this!On the forum,owners have had their plastic oil pans actually crack.Thats a easy 1,000.
If it would happen on the expressway,you could lose a motor when the oil light came on.
And of course, my dealer doesn't tell you a lot,so my advice is be pro active on your brand vehicle.Join a forum,unfortunately some one else's mis fortune might help you!Back in the simpler,old days,you would take it out and rattle it!!!
If it would happen on the expressway,you could lose a motor when the oil light came on.
And of course, my dealer doesn't tell you a lot,so my advice is be pro active on your brand vehicle.Join a forum,unfortunately some one else's mis fortune might help you!Back in the simpler,old days,you would take it out and rattle it!!!
The VW/Audi oil separators are a huge PITA, blown out rear and other seals are common when it lets go. There is an quick and easy test for this anyone can do (I test it every OCI or if it seems to be running rough). Pull the oil dipstick plug and use a vacuum gauge adapter and connect the gauge spec is 2.5 to 3 inHg as shown on the inner ring on this gauge (not mine but HF has this one in the picture for under $20), on car originally equipped with a white top separator always use the latest OE or Hengst 06H103495AK. One of these adapters will fit perfectly.
https://www.amazon.com/Mityvac-MVA6912-Diagnostic-Adapter-Kit/dp/B007TMSN5G
My throttle bodies & intakes are aluminum. Old cars. No worries about messing up the plastic.
I’m betting consumption will slow/stop when I replace it. Finally realizing a 10w-30 or 15w-40 definitely helps oil psi in drive while at a stop too. 5w-30 didn’t do this.
I’ve seen this twice. Required a new PCV valve, replaced the hoses (I could get) like 2 cans of carb cleaner and some elbow grease.
Dramatic improvement
I stand corrected. Checked my cars and they DO have plastic intake manifolds, ( the metal heat shields threw me off). CRC Throttle Body Body Cleaner said it is safe for plastic MANIFOLDS & THROTTLE BODIES. I just would not be scratchin around with scotch brite on the plastic TB's...... All my cars idle better and have a much better throttle response after a good bath of CRC down the TB and PCV intake hose. I have aluminum TB's and metal PCV valves, so they can be cleaned. Can't use too much at once, overheats the CATS and they start stinking. I do this procedure every 2 years, and no problems. Nice carbon free TB's and oil free PCV's. I always do an OCI due to dilution after cleaning is done. Happy engines 
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