I have some thinking about pcv valve that i haven´t found anywhere.
How are they suppose to be connected? I took some pics today, I have put 2 of this http://www.ecklerscorvette.com/corve...1989-1991.html at the valvecovers, on each side.

It shows on the pics, before it was another connection, i show in the pic, the black connection, on the drivers side(i think, dont remember exactly) and a pcv valve on the passenger side..

Car is 1989 conv, stock

hope someone can explain this to me

/Gustav

http://img5.imageshack.us/img5/1848/p1060938q.jpg
http://img225.imageshack.us/img225/3019/p1060936q.jpg
http://img844.imageshack.us/img844/3893/p1060935.jpg
http://img7.imageshack.us/img7/3382/p1060934c.jpg
http://img846.imageshack.us/img846/3365/p1060933.jpg
http://img26.imageshack.us/img26/3258/p1060932gj.jpg
http://img824.imageshack.us/img824/4039/p1060931v.jpg
http://img692.imageshack.us/img692/5392/p1060930i.jpg
http://img190.imageshack.us/img190/8485/p1060929m.jpg
http://img16.imageshack.us/img16/5893/p1050535r.jpg

 

A.first of all, your rocker covers are on the wrong sides of your engine. swap them back, and it might become clear. The oil cap should be on the right front corner of the engine. The corvette logo should be where your oil cap is.
The reason for this is that the oil cap will be higher up from the point at which the oil may accumulate if it is at the highest point of your engine oil system.
B.There are 2 connections on the right side of the throttle body. the black short tubes. one goes to the rubber breather hose that goes to the rocker cover on one side, and the other one goes to the vapor cannister. The pcv valve is on the left side, but the hose is not correct.
C. pick the side you want your PCV valve to be on, it is supposed to be on the left hand side, and the little plastic breather should be on the right. BUT! you can't have 2 PCV valves!!!!
What happens is:
1 when you are idling, the vacuum in the manifold is high, and the vacuum line to the PCV valve is removing vapors from your engine through the PCV valve.
2. When your engine is accelerating, the vacuum goes to almost nothing, so the vapors have to go somewhere, so the breather line from the right rocker cover blow into the throttle body, and are near the throttle plates so if there's excessive blow by, the vaporous oil does not clog any ports in the throttle body, it just blows into the main passage, and is consumed by all cylinders in the combustion process.
Once you resume cruise condition, the vacuum is high again, but the RPM is up. The PCV valve is doing it's job, but there might be more vapors than it can handle, so the breather then takes the overload, and they both deliver the fumes to the intake to be burned in the combustion process.
you will know you have excess vapors because your engine will begin to weep oil from the weakest seals/gaskets.
THe third vent is for fuel vapor venting from the gas tank/vapor cannister under the left headlight.

2. The spark plug wires need to be isolated from the smog pump tubes because they are not always cool. If you notice the discolorations where the short vertical tubes intersect the larger tubes, that is hot, hot, hot. you need to get the little plastic holders for the plug wires from your chevy dealer. Besides they look neat restrained.
Clean engine by the way, nice!!

 

I see, but does it look right on my engine, if you look at the pics? On the passengerside it was a little suction when i put my finger in the valvecover hole, and on the driverside it was blowing a little when i was idling.

 

Oh, i saw that the last pic was before i did makeover of the engine, what a difference
The real question i have is simply, can i have these 2 pcv valve connections in the valve covers? one on each side i mean or should i have the old one which were just a hole stright through on any side?

 

use one pcv. it goes on driver's side like the last pic. the pass side is the filtered air inlet from the TB. as the man said, if the blowby is heavy it also allows the gases to return to TB.

one pic was correct hose for pass side but had the pcv on it, and goes to TB. the second one I think.

#846 is right hose, needs the plastic elbow, no pcv.

 

There is suction when the PCV valve is in and working. If you pulled the breather line, you will feel it.

 

Thanks for the answers, i see that now, it is obvious that i can´t use pvc on the passengerside, pic #846, it would be closed all the time then.

On driverside i felt the suction on the pvc.

thanks, will change it tomorrow, havent driven far with it like this by the way..

/ Gustav

 

no big deal, pcv was still working, maybe in a deep vac. your engine looks new! someone took care of it, no?

saludos, joe

 

I will swap the valve covers back too, didnt think it mattered, not me that has done though hehe

 

Yeah, it looks good thanks
Made it mostly myself, did not put the valvecovers back myself last time, going now to replace them.

By the Way, I used powder coating for painting most of my engine parts, anyone else tried this?

/gustav

 

Changing valve covers was easy, not.
Im just so f***ing angry right now..

 

not sure you had to. unless there is a baffle under the pcv to prevent oil spalshing into the high vac line, no cause for it. I recall in the old days there was one.

good experience.

 

Took me ONLY 3 hours hehe, have done it myself before but that was when i took the engine apart, little more easy then..

Here is what it looks like now, and I also made a video, the sound quality isn´t the best but anyway..

http://img641.imageshack.us/img641/2112/p1060944a.jpg

http://img695.imageshack.us/img695/7056/p1060945c.jpg

http://img219.imageshack.us/img219/755/p1060946w.jpg

http://img810.imageshack.us/img810/1957/g8l.mp4

 

HA! what's a few wasted hours when you're in bed with your baby? so to speak.

I noticed your wire routing. Against GM routing instructions. They need to be hidden behind the dist so you can't get to them!

Just pulled my dist yesterday -needed something to do with my spare time- and rerouted my wires. GM does warn us not to get them too close to the dist connections, esp the ecm connector in front -due to possibility of induced high electrical voltage, then they route #2 and 3 in front.

saludos, 'joe

 

I see, Im going to reroute them, which is the best way to do this? do you have any good pics?? I recently did this, I have another thread where i had som problems with the dist hehe

 

By the way, my cheap timing light couldnt handle these wires, so i guess they are pretty good Had to take the old sparkplug wire when i did the timing

 

I was joking about routing. GM did not have the optimum routing, for certain. Many people change to suit themselves.

One thing to watch is wires against vibrating surfaces -which includes almost everything. But it take a LONG time to wear through a plug wire.
Generally, you don't want them across one another if firing consecutively, like 5-7, 8-4.

joe

 

Aha ok, didn´t know for sure haha, i just try to have them separated from eachother and i also cut out some extra rubber tube and put the around the sparkplugswires that are to close to eachother or close to the manifold.

/Gustav

 

BTW, anyone have the part number for the TB to PCV valve hose that's on the right (passenger) side? Thanks........

 

Nope and here's a suggestion for the future - start a new thread. You posted at the end of a three year old thread about PCV valve routing. You're looking for a part number. Apples to oranges. People have to read through the entire old thread to find out you want a part number. Wouldn't it be much easier on everybody if you started a new thread with the initial post stating the year of your car and the question or issue you have. This trend of reviving old threads for new questions that are only tangentially related to the initial thread's issue/problem/question is starting to get old real quick.