PCV or not?

[not so famous bob]

Read the above posts, it was explained very clear I thought.

There is a couple of very stupid statements on here, u pick which ones. A 1968 hemi roadrunner came from the factory w/ a pcv on one side and a breather, conn. to the air cleaner on the other side. That was a stout engine that didn`t put oil blow by into the atmosphere, need I say more ?

 

[747mopar]

Lol, all this over a pcv question.

Like most are saying it evacuates crap from the crankcase and helps your seals seal better. I've found my engines to be less prone to leaks using a pcv.

 

[not so famous bob]

Lol, all this over a pcv question.

Like most are saying it evacuates crap from the crankcase and helps your seals seal better. I've found my engines to be less prone to leaks using a pcv.

agree !

 

[Steve Garner]

You're right, it wasn't the EPA that instigated them. California's Air Pollution Control District required them starting in 1961, New York State's similar agency in 1962 and most other states by 1967 with the passing of that year's Air Quality Act. The EPA itself wasn't established until Nixon enacted it in 1970.

Are you sure that any regulatory body required them? L88's were delivered in 67 with road draft tubes.

 

[furyus]

Several people seem to have questions about the catch cans, including me. Could someone explain, and maybe post a picture? I tried a PCV on my car. Seemed fine until I fired it up one time, and got a big cloud of blue smoke out the exhaust. I plugged the PCV, and no more smoke. It was hooked to the back of the carb. No place in front. I think there's something wrong with how i did it, so i might need a catch can. If it were explained better.

 

[Bill Monk]

Several people seem to have questions about the catch cans, including me. Could someone explain, and maybe post a picture? I tried a PCV on my car. Seemed fine until I fired it up one time, and got a big cloud of blue smoke out the exhaust. I plugged the PCV, and no more smoke. It was hooked to the back of the carb. No place in front. I think there's something wrong with how i did it, so i might need a catch can. If it were explained better.

I'm no help on the catch can, but you should not have seen the blue smoke unless the valve was faulty and you were sucking oil into the intake. I had no idea anybody with a street car had issues with pcv valves. To me they are as much a part of the engine as a spark plug....

 

[Lelo 500]

I have one get you some pics later today. You ought to see the goop water/oil stuff that collects in there. Its a good thing to have but not a replacement for a PCV. It is plumbed in between the PCV and the carb.

 

[doublekrossd]

I went with one of the Wagner adjustable ones. It surely doesn't hurt anything. I'm pushing nearly 700hp so I was told ill have a little "extra" blow by, and crankcase pressure. I put the pcv on and it seems to work good. Not leaking oil anymore, and the adjustable makes it work with low vacuum engines like mine.

 

[threewood]

Several people seem to have questions about the catch cans, including me. Could someone explain, and maybe post a picture? I tried a PCV on my car. Seemed fine until I fired it up one time, and got a big cloud of blue smoke out the exhaust. I plugged the PCV, and no more smoke. It was hooked to the back of the carb. No place in front. I think there's something wrong with how i did it, so i might need a catch can. If it were explained better.

A catch can is simply a vessel that allows the suspended particulate (oil, water) to cool, condensate, and deposit in the vessel while the air continues on its way back through the carb. It is generally used in conjunction with the pcv valve.

 

[dvw]

No

I have no knowledge of catch cans but I can tell you that I work with someone that just blew a rear main seal on a 2012 cheby because in the cold temps we have been having, ice and sludge restricted the pcv valve. Crankcase pressure caused the failure. This just happened Friday, run a pcv on the street.

It still has the crankcase vented to the air folder assy. It would act the same as using a breather only. I don't buy this as the cause.
Doug

 

[Bill Monk]

No

It still has the crankcase vented to the air folder assy. It would act the same as using a breather only. I don't buy this as the cause.
Doug

Apparently the diagnosis is legit, extended warranty is covering the repair and I know a guy that works for the dealership but I have to say that I have never heard of a faulty pcv valve causing a main seal to blow

 

[747mopar]

Several people seem to have questions about the catch cans, including me. Could someone explain, and maybe post a picture? I tried a PCV on my car. Seemed fine until I fired it up one time, and got a big cloud of blue smoke out the exhaust. I plugged the PCV, and no more smoke. It was hooked to the back of the carb. No place in front. I think there's something wrong with how i did it, so i might need a catch can. If it were explained better.

It could have been from not having a baffle in the valve cover? You don't want oil splashing off the rockers to have a direct path to the pcv, just make sure there's always a baffle wherever the pcv is.

 

[747mopar]

Apparently the diagnosis is legit, extended warranty is covering the repair and I know a guy that works for the dealership but I have to say that I have never heard of a faulty pcv valve causing a main seal to blow

I had a 305 Chevy that blew the intake manifold end seals twice in a short period of time, fixed the leak and added a pcv and that motor never leaked another drop the whole time I owned it. Think of any gearbox, rear axle, etc, they all have vents otherwise they build pressure from heat and leak. Now add blow by, fuel contamination, much higher temps and you can see why a vent might not be enough and how easy it could build enough pressure to blow a seal.

 

[mopar 3 B]

PCV = positive crankcase ventilation.
If you want crap all over your valve covers and blown seals just do away with it.
The engine is a huge vacuum pump. Its exhaust not so much.
My thoughy on a catch can. If its got water and crude in it changing your driving habits maybe a better solution.

 

[66chargerpat]

Hey I would like to apologize for my actions last night i had a few to many but i just wanted to let you know i appreciate all of y`all and y`alls help. And by the way i also use a PCV Valve and i wish there was a better way. Pat

 

[furryfrog]

Well there are some cons to a PCV system, Oil blow by decreases the octane rating of gasoline, can pool up in your intake manifold, gunk up throttle body's, probably attribute to carbon buildup on valves and piston tops. On performance engines I would defiantly recommend a catch can to lesson the amount of oil vapour going through your engine
I am just venting both my valve covers to atmosphere till I get a system set up, my engine is not smelly sitting in traffic at an idle. I also am running catalytic converter. To all the guys crying environment air quality as a main reason for a pcv system, well, I hope you have catalytic converters on your cars.
I do intend to set up a system on my car, It will be used only under vacuum though and with a catch can. When my manifold pressure drops and I go into boost I will vent to atmosphere. I don't want to run lines all the way to the intake side of my turbos to evacuate gasses under boost, plus on other turbo cars I have had, they collect engine oil in the inter-cooler from the pcv system.
Honestly though, I'm not to worried about carbon buildup, or reduced octane, I'm running water injection so that keeps my piston tops clean. Just a little lazy on setting up a system and I have enough hoses running around already. I just need to get on it I guess.

 

[furryfrog]

Several people seem to have questions about the catch cans, including me. Could someone explain, and maybe post a picture? I tried a PCV on my car. Seemed fine until I fired it up one time, and got a big cloud of blue smoke out the exhaust. I plugged the PCV, and no more smoke. It was hooked to the back of the carb. No place in front. I think there's something wrong with how i did it, so i might need a catch can. If it were explained better.

http://oilcatchcan.com/

 

[383man]

delete

 

[383man]

It could have been from not having a baffle in the valve cover? You don't want oil splashing off the rockers to have a direct path to the pcv, just make sure there's always a baffle wherever the pcv is.

Delete

 

[Lelo 500]

Starts here

Catch can

Back into the carb