I don't know if it gives me comfort that all maintenance, cleaning, and servicing will be done to my standards or bothered by how much junk I'm finding.... Luckily, I like doing this crap.

Btw, those that have blocked off the breather to the manifold (my bad, I meant block off the inlet of the manifold) , have you gotten any codes as a result? I'm thinking it wouldn't, since it's pressure, vacuum, and mechanical. No sensors tied to it, however I'm questioning if it may throw off the O2s?

 

Time for a catch can?

 

​​​​​​See second paragraph....

 

I don’t think anyone has blocked the pcv system off.. a quick google search will tell you why that’s a silly idea. But if you want to be the guinea pig to tell us which codes you pop doing this and which gaskets you end up blowing out from the increase in crankcase pressure do it up

 

Nobody has done this because it would cause considerable damage.

 

Why would you want a huge 6.2 v8 building pressure inside the block? Don't you think the engineer's thought of blocking it rather than building oil in the manifold?

Run a catch can and you will be good to go and if you insist on blocking it at least vent it to atmosphere.

 

Are you saying this assuming the outlet of the block would blocked or capped? If so, then I agree.

To add more context, I intend to block the inlet part of the manifold and let the pressure (from the block) out into the atmosphere. Probably route a line under the engine bay or keep the PCV valve attached and attach a filter on top of the PCV valve.

From what I recall, manufacturers routed the fumes, due to releasing the pressure from the block, to the intake for emissions purposes. Theoretically it serves no other purpose or at least that is my understanding.

 

Whoops, I misspoke. It was late and I was tired.

That's what I figured. Just making sure merc didn't leverage it for any reason or put a feature on it preventing people from venting it out to the atmosphere.

 

Only problem I see is not getting enough oil out of the block as the manifold is a huge vacuum sucking it out. Best bet is a catch can.

Good luck either way

 

Catch can is by far the best option. Putting a filter on the outlet is a messy and sub-optimal solution. They drip, you get oil film covering anything nearby, and it’s just not the right thing to do. Plus as mentioned above you lose the scavenging effect. Sticking a filter on is something you did to an Eagle Talon 25yrs ago because you were broke and didn’t have enough money to buy a catch can. Don’t be that guy.

 

Maybe you don't fully understand how the PCV system works?

Excellent info from Radium here. --> http://www.radiumauto.com/Blog/Post/Catch-Cans-101-102

 

How many miles do you have on the car?
If you had more than 60k milres on it I wouldnt even bother because that build up you have doesn't look bad at all.
As mentioned above a catch can is your only reasonable option.
Luckily another member here on the forum is selling custom fittings which is the best option I have seen so far. Way better than VRP's poorly designed fittings which interfere with the airbox retention clips or Weistec's overpriced kit.

 

Thanks for all the responses. I do know a bit about the system, but I'm still unclear or looking to confirm the following. First, some facts.

Problem: piston ring damage and potential other internal damage
Cause: crankcase pressure from blow-by
Resolution: release crankcase pressure
By-product: harmful environmental fumes

Solution: leverage intake vaccum to push/pull air through crankcase and recirculate back into intake to be re-burned.
Issue 1 - oil and water (condensation) in intake gumming up or creating premature wear on intake components.
Issue 2 - lowers octane​​ .

Aside from lowering octane, where I see the issue with the stock system is that it is creating to much pressure and/or vacuum that it's pushing pulling oil into the intake, at least more than I think it should. It's gumming up the valves, ports, and fuel injectors. Also, I feel it's a main contributor to carbon build on top of the pistons. Without quantitative measures, one drop of oil sounds like it would be significantly more than in the contant of air to be burned.

A catch can is probably the best all around solution, but I think there's better and less costly ways however, at the cost to the environment. I can't believe Weistech sells a system for $500. Anyway, I digress. My small issue with a catch can is having to drain it but, the air being recirculated reduces the amount of oxygen for combustion. This sounds more plausible without needing quantitative data.

I think running a line down the engine bay will solve for condensation/water getting into crankcase. Also, I don't think the pcv tube length would not get cool enough to condensate the vapor thus flowing into the crank case. If it does, it's probably very little and significantly less than a catch can system with a long routing system.

This sounds more intense writing/reading than in my head, but I feel this is significant in having the engine running optimal, maintenance efficiencies, and potentially replacing parts.

Where it is not clear to me, is the negative affect the blow by has on the oil, given that there is no pressure in the crankcase vs all of the other negative effects of recirculating it back into the system. I'm sure the blowby degrades the oil to some degree, but would changing the oil in more intervals solve for that?

 

Quick pic update. Found a plug that has a positive snug fit and looks oem.

 

In b4 post on catastrophic engine failure

 

There is a guy selling fittings for a catch can a few threads down lol. I think he wants 100 bucks for them and you could just cut the pcv valve and use that.

OP you wont get all the oil out the block without the suction the intake manifold makes.

 

I'm thinking about purchasing them and they look quality.

Can you explain what you meant when you said "you won't get all the oil out of the block without the suction the intake manifold makes?"

 

I cleaned my intake up and went maybe 3 months without a catch can and did about 15 1/4 mile passed and then opened up the manifold and it was full of oil.

I'm assuming there is oil not just vapors and gases in the crank case and just letting it bleed to atmosphere won't let it all out the block.

You need that vacuum you get after going wot and letting off the gas to pull everything out the crank case.

 

Gotcha. I didn't want to assume anything. I don't think the pcv suppose to pull oil from the block. It probably does because how strong the vaccum is and how much the oil is splashing around from the crank at WOT. I think leaving the pcv outlet open and into the atmosphere would be just pushed out if or when pressure builds. Also, I believes there is a breather valve on the crank case. If pressure from the vacuum is too much, it may keep the breather valve closed and a possible reason the pcv is picking up oil at wot. This is hypothetical however.

 

What you “think” does not correlate to reality or the actual experience of others.

What you “think” you should do will result in a) a mess, b) oil buildup in the IM due to the scavenging effect of the closed loop system being lost, and/or c) catastrophic damage due to unrelieved crankcase pressure.

Seriously, all this stuff is on the internet dude. Please read something or Google. Your ideas are dumb.

 

Hey dinglenut, it is true you leverage MBworld as a means to feed your social ego...and I don't think your ego understands how much credibility you dont have when you think your responses always suggests that you you are always correct, when in fact there are countless threads where you are dead wrong and/or you just disappear lol. I couldn't give two *****s about your opinion and why I've never responded to them. But, hey that's my opinion and we don't have to get along. Just one suggestion, stop commenting if you can't articulate your reasoning and point to "search the internet" especially when you don't know a person's background and impacts to the automotive industry. In which and in this case, misread or making assumptions of what you couldn't wait to jump on and make your typical adolescent comments and thought processes. Mature the f up and learn how to debate, then maybe you'll get more respect and people taking your suggestions as solutions and not just "here that douche bag, again..."

 

My debate skills are just fine, thanks. I just choose not to waste my brain cells on people like you. Why don’t you tell us what you “think” about something else you have chosen to learn nothing about.

Good luck breaking your car. You’re off to a great start!

 

You wan't vacuum in your crankcase and without a dry-sump the IM is the only way to do that.

More reading for you --> https://motoiq.com/crankcase-ventila...d-n-a-edition/

 

low tension piston rings as with most road worthy vehicles require as little positive pressure within the crank case as possible. this will allow for maximum piston ring to bore sealing as well as aiding in power production. dry sump would take this even further by scavenging oil vapor from the crank case allowing the crank shaft to spin with less effort.

 

Thanks for the link. Article looks interesting, hopefully I'll get to read it later today. I've heard folks using the exhaust as a scavaging means as well, but I don't want to go that route.