Yes, I love these Chevy six cylinder engines. They are simple and reliable. My current favorite is the 292 but they have that forward motor mount on the passenger side so that takes a little extra work. Thanks for your comments.
The breather which is upstream of a throttle body is actually a 2 way breather. Not many people realise this. Under maximum load and/or WOT, the little PCV valve is essentailly useless because so much blow by is being generated. At this point, the breather acts as a real time vent which allows excess crankcase vapours to enter a manifold upstream of the throttle body. Most people assume (incorrectly) that the PCV valve can process 100% of an engine's blow by, but it's not meant to.
@@vintagechevyvanparts the downside to the process is the airbox (and the main PCV breather hose) invariably becomes contaminated with blow by gases. We're talking 10 years or more, but it's somewhat inevitable.
Not Sure that I agree. PCV systems do not work at WOT because there is very little or no vacuum present. If an engine has excessive amounts of blow by, it is time to rebuilt the engine. I do not think I would call the PCV system an emission system. It came out around 1963 as a better way to get water vapor and other light end stuff out of the crankcase. It replaced the old "road draft tube" that used to hang down under the engine in the air stream. That system would only work if the engine was warm and you drove at speeds over 15 mph. Most emission control systems started to show up in the late 60's. Sincerely, Richard Goodman
@@RichardGoodman Thanks for the comments. You bring up excellent points. I agree that excessive blowby is a clear indication of a worn engine but even properly operating engines will have some blowby which is better burned in the engine instead of being vented to the atmosphere. So it should result in less emissions. I believe one of the original reasons for PCV was that fuel vaper would accumulate in the crankcase and occasionally result in an explosive detonation, causing engine damage. So I don't think it started off as an emission control device. By the time they were adding and checking emission controls, it was one of the required items to check. I appreciate your insights Richard!
@@vintagechevyvanparts Cool, thanks, I've seen that one for sale. I wasn't interested in chrome, but seems like that's all that are sold. I mostly afraid of getting a cheap thin chrome one. I can always paint the Edelbrock one though.
My favorite engines. I put a 230 and powerglide in my '41 International pick up. Great driving torque.
Yes, I love these Chevy six cylinder engines. They are simple and reliable. My current favorite is the 292 but they have that forward motor mount on the passenger side so that takes a little extra work. Thanks for your comments.
Awesome video Mark
Thanks 👍
The breather which is upstream of a throttle body is actually a 2 way breather. Not many people realise this. Under maximum load and/or WOT, the little PCV valve is essentailly useless because so much blow by is being generated. At this point, the breather acts as a real time vent which allows excess crankcase vapours to enter a manifold upstream of the throttle body. Most people assume (incorrectly) that the PCV valve can process 100% of an engine's blow by, but it's not meant to.
That makes perfect sense since at wide open throttle, there is also much lower vacuum. Thank you for your comment.
@@vintagechevyvanparts the downside to the process is the airbox (and the main PCV breather hose) invariably becomes contaminated with blow by gases. We're talking 10 years or more, but it's somewhat inevitable.
Not Sure that I agree. PCV systems do not work at WOT because there is very little or no vacuum present. If an engine has excessive amounts of blow by, it is time to rebuilt the engine. I do not think I would call the PCV system an emission system. It came out around 1963 as a better way to get water vapor and other light end stuff out of the crankcase. It replaced the old "road draft tube" that used to hang down under the engine in the air stream. That system would only work if the engine was warm and you drove at speeds over 15 mph. Most emission control systems started to show up in the late 60's. Sincerely, Richard Goodman
@@RichardGoodman Thanks for the comments. You bring up excellent points. I agree that excessive blowby is a clear indication of a worn engine but even properly operating engines will have some blowby which is better burned in the engine instead of being vented to the atmosphere. So it should result in less emissions. I believe one of the original reasons for PCV was that fuel vaper would accumulate in the crankcase and occasionally result in an explosive detonation, causing engine damage. So I don't think it started off as an emission control device. By the time they were adding and checking emission controls, it was one of the required items to check. I appreciate your insights Richard!
I lost the bottom half of my Pcv grommet into the valve cover. Will this clog things up if I don’t remove the valve cover to get it?
Probably not but it’s best to remove the valve cover and get it out of there. Thanks for the comment!
Nice Video, is there a replacement valve cover that you would recommend? Mine is bent and three of the bolt holes are cracked, so I need to replace.
Edelbrock has a chrome model the last time I checked. The 194, 230, 250, and 292 engines should also all interchange.
@@vintagechevyvanparts Cool, thanks, I've seen that one for sale. I wasn't interested in chrome, but seems like that's all that are sold. I mostly afraid of getting a cheap thin chrome one. I can always paint the Edelbrock one though.
👍👍
Thanks for the thumbs up!