i've been running copper RTV sealant instead of a gasket on my intake manifold for prob 20k, holds any pressure i throw at it without any leaks.
I haven't seen the PCV on a Techco (that I remember anyway). So the crankcase pressure/oil comes out of the passenger side head between #6 and #8. Where does it go from there in the Techco blower?
So the valve is on the blower body between 6 and 8? Where is the oil coming from? A channel in the blower body?
yes. Not sure what you mean by a channel or where the oil is coming from? Do you mean how is the oil getting into the cylinders?
I'm just trying to picture the oil flow from the head, through the Techco and out the PCV valve. Is the Techco PCV the same as the OEM valve? I'm wondering if the techco valve isn't big enough or move enough pressure.
all they did was relocate the valve from the front of the block, to the runner between 6 and 8. The valve is still OEM. My thought is that there is too much pressure. In other words, air coming through the PCV is great enough to actually push the oil under/over the OEM gasket thus causing oil to drain directly into the cylinders. Why do I think its the PCV Valve? Both plugs closest to the PCV port are getting the majority of the oil... When I remove the plugs later this week, I will take a few snap shots. Here is a pic where the PCV mounts at 6 and 8. The hose that is just in front of the BT tranny cap, connected to the 90* is where the PCV is located. The steel braided line just under the Techco cap (front of blower) is the starting point for the PCV going to my BT catch can...
My first thought is that the rise and vertical 90 degree turn may be too much for the system to overcome. Is your catch can getting any oil, more or less than before? I'm also thinking that the oil vapor may be condensing on the rise or colliding at the 90 and "raining" back down to the blower/head interface.
I never really gauged the catch can since adding the Techco. hmm. I guess I could stop being lazy and look right now? haha I never even considered the 90 being a culprit, as you stated. hmmm I suppose I could remove the 90*? Just need to figure out how to keep the hose itself from kinking. haha that's the easy part. Thanks Adam.
Ha. Here I was thinking that the port between the 6 & 8 was IN -> to the intake... "picture's worth a thousand words". I'm going with Adam's thoughts on condensation BEFORE it gets to the catch can. Then when you engage your mega boost it could be overpowering the girlie PCV valve you have and the liquid oil is going back in. Now it's liquid instead of vapors or atomized droplets so it's pooling and isn't going to come back out the PCV valve when you go vacuum again. Question: would that be pooling right by the intake ports for 6 & 8? I still have a hard time going with it getting sucked/blown by any gaskets... Another thing you might try before ditching the pretty 90* would be to lower your catch can so you have a down hill run to it. Better yet if you could mount it just below the 90* so you have a short down hill run to it (less chance/time for condensation).
Well Crap!! I know why she's leaking so bad and it's not going to be an easy fix. So I just compared our stock gaskets to the Techco Runner. We have three major problems bud. First and foremost: The stock gasket were it sits directly adjacent to the port does not have the metal support molded into it like the remainder of the gasket does. So it just flaps in the breeze so to speak. :cry2: Where I'm talking about is the lower left and right side about 1/2" long. http://i28.photobucket.com/albums/c249/techpwrsparky/Techco/1013090715.jpg Second. Billy Tally made the comment one time that CMW's heads was ported to large and one of our other members. I always wondered why that comment was made and now I know why. CMW gasket matches their port just like most everyone. Well what is happening is the rubber is getting sucked into the port at the PCV port. There is only one bolt there to secure the runner to the heads and between a lack of clamping pressure and the fact that your now forcing air into the chamber which is no doubt lifting the runner (even if it is only a thousandth or so) making for a bad situation. Also because the rubber does not have the metal backing is most likely a few thousandths thinner. Third. This is were the PCV valve is located. But it sticks straight up. Something I need to add is the fact that the PCV system is plumbed identical to stock for the most part. So it is not exposed to the same issues such as in Nathans case. Vaccum is drawn from behind the throttle body and supply is provided ahead of the throttle body. All is good with the exception that the valve stick straight up and I have no doubt that oil pools on top of the check valve. So with the right circumstances as the valve opens, the pooled oil will saturate the top of the head there and with the vaccum drawing it into the port makes it much worrsseser :sorry: Now for the worst news of all. My suggestion of using the flange sealant inlue of a gasket WILL NOT WORK. The reason is that the runner system was engineered for the thickness of the gasket to be in place. Without it, the manifold will sit lower then designed and that will force the snout up and create a pulley alignment issue. And if you think I'm nuts, this is one of the problems we had with Hemi911's ride. Just a coupld 10ths will screw the pooch on alignment. SO, the solution. I want you to use a slow setting silicon sealant. Only apply it on the head and the runner at that junction. Make certian there is no oil residue and everything is spotless. That should glue the gasket in place and solve 2/3rd's of the problem. Have a nice day. :bye:
Cam, I know that he may need a longer blower belt, but what about the 1/4" one piece Bwoody spacer. They're OK to run without a gasket and are much more "structural" in that spot. Maybe a little stick-um or spray gasket between the head and Bwoody too to ensure the seal. This guy: http://bwoodyperformance.com/product_info.php?cPath=67_33&products_id=384
Great catch, Cam. I was just out and realized that I already took the 90* out a couple weeks ago (hahaha old age on this one). lol I also noticed that my catch can is pressurized. haha Once I got the seal broke on the catch can, whoooooooosh. WTF? I don't ever recall the can being pressurized??? What silicone do you recommend? I am assuming what you and Kyle recommended yesterday is not going to work as they are a gasketless sealant? Who loves you Cam? That's right, I DO!
If your catch can has pressure (or vacuum), I'd check the PCV valve to make sure its functional and then check all the hoses, catch can, etc. first. It sounds like the valve may not be opening, incoming air creates a vaccum, outgoing crankcase oil/pressure hits a closed valve and dumps into your cylinders...
