• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Phenolic IC ISSUES..please help. Sucking in oil cap.

PWNED

PWNED

New member
The first install I did not rtv enough to the coolant elbow side creating a vacuum leak.

Second I rtved too much as the top half split and stuck to the SC. So the rtv blocked the front and rear pcv passages. Thus I got the worse whistle EVER.

Third....

I just cleared out every hole and re rtved. No crazily. Started it up and it is still trying to suck in the oil cap.......WTF could be wrong here!?
 


Not sure about yours, but some IC cores do not have PCV passages and require a breather or drilling your own....
 
Pcv is not working it's either clogged with rtv or not run correctly, where did you connect the vac lines? Are you running a Gen v? Did you tap throttle body? Most icS don't have front Pcv working so you need to tap oil cap and tb to get it to work right.
 
I am using a gen3 blower with ported lower.

The phenolic is ed's newest. Should retain stock functioning pcv.

I found rtv in both ports....again.....again I did not go crazy.

I have the lower half still stuck to the LIM. Going to try and rtv the sc againnn. I wish there was a way to just rtv the IC but no way in telling where the sc will hit.








Vac leak..as seen below



 
Last edited:
This is a picture I took before I set the SC on the IC just to see where the rtv spread out too.

As seen i rtvd the pcv ports on the IC this time. You can slightly see the rtv I put on the SC as well of you look past the sharpie.

Let see how this works.

I did leave the IC stuck to the LIM. I did put a screw driver down both pcv holes on the IC to the LIM pcv holes to ensure no plugging.

 
Last edited:
While i let the rtv set a bit longer i have some Q's.

Can someone inform me how our pcv system works?
If the oil cap is getting sucked in it means just the front pcv is plugged? How will i know if the rear is plugged? If i HAVE to i will just slap a breather on. If i do this will i hurt anything? Will it just vent the front? Then i wont know if the rear is working?
Sorry for the rant. Had this apart 5x in a few days.
 


3800pcv.jpg
 
The oil cap is still being sucked in. What am i doing wrong here? Can i just put a breather on and be done with it? What about the rear?
 
Yes the pcv valve is in the sc with oring.

I had to make this vent tube that just chills out in the engine bay just so I can have my engine not collapse it self.

I took it for a beat run just now with tube in place not connected to anything and I am hitting 10.0afr.
The other days when I had my vac leak and no IC I was hitting 10.4s but it was also 80* as now it is 45*. Im not sure if it is just the weather or if the pcv is causing this/my home made tube. No tuning changes.

 
If rear port is plugged it will not put vacuum to crankcase so it would not suck the oil cap in.

You have vacuum in crankcase

Your front port must be clogged. Are you using stock l67 TB on gen 3 supercharger? If so it must be blocked with rtv. You can try taking TB off and blowing back the PCV passage with compressed air. That may clear it.

If that doesn't work you can run a breather, run an external PCV hose from oil cap to TB or reseal.
 


I am using a ported stock TB on a Gen3. Is this an issue?

So it is normal for the cap to be sucked in ONLY if the the rear is actually working? What if the rear were plugged and front was not? What if both were plugged, what would the engine do?

Yesterday was horrid with the noise the engine was making!!!!

What hole am I trying to blow out when I remove the TB? Can you point it out in the above picture?


I think my biggest issue is that I am Gen3 and the pcv system has smaller openings vs a gen 5. So when I seal it I am just screwing myself.

Not sure if it matters but when your product first came out a hole must be drilled for rear pcv. Now it retains stock functions front and rear. For ****s I looked down where the pcv valve goes and you can see the rtv but that pcv passage does tunnel to the left a bit. On a Gen 3 it has the 2 openings on the rear vs a Gen5 has a giant one as seen. I was contemplating on drilling a hole in the LIM for the rear pcv to have a nice free space but then the IC would need to be which is not happening.



 
Last edited:
I'm confused. One of your issues is that you keep blocking stuff with rtv, yet you continue to put huge beads on. Are you putting it on BOTH LIM and blower? Unless something is seriously warped, your LIM and blower will be only a couple thousandths apart when you tighten them down. That's all your filling. If 99% is being squeezed out to your intake passage and PVC then you could use about 98% less.

If I'm missing something, and this is just what everyone is doing for an intercooler, then forgive my ignorance, I've just always thought less is more when using this stuff.
 
The above 2 images were for reference of a gen5. Not mine.

Yes upper and lower get rtv. Not crazy amounts either but it still finds its way to pcv it seems.

Other customers are using rtv to seal as well.. Maybe I have an issue because I am using a gen3 blower? I'm guessing a lot have gen5's which appear to have larger pcv openings.
 
PWNED said:
This is a picture I took before I set the SC on the IC just to see where the rtv spread out too.

As seen i rtvd the pcv ports on the IC this time. You can slightly see the rtv I put on the SC as well of you look past the sharpie.

Let see how this works.

I did leave the IC stuck to the LIM. I did put a screw driver down both pcv holes on the IC to the LIM pcv holes to ensure no plugging.

Click to expand...

thats way too much rtv

bandook said:
I'm confused. One of your issues is that you keep blocking stuff with rtv, yet you continue to put huge beads on. Are you putting it on BOTH LIM and blower? Unless something is seriously warped, your LIM and blower will be only a couple thousandths apart when you tighten them down. That's all your filling. If 99% is being squeezed out to your intake passage and PVC then you could use about 98% less.

If I'm missing something, and this is just what everyone is doing for an intercooler, then forgive my ignorance, I've just always thought less is more when using this stuff.
Click to expand...

correct, rtv is used excessivly in alot of situations due to the old school "lay a 1/4" bead" that was for oil pans and end seals on the intake...machined RA was rougher back then as well as gasket surfaces with large distances with little clamp load and larger passages/openings due to the older sand casting methods.

with rtv your only needing a bead about twice as tall as your fingerprint ridges. bias the rtv AWAY from the vital openings. rtv hates compressing, it doesnt spread out or flow well...this can create a lumpy sealing area and other headaches like gaskets sliding out/splitting as well as the ribbons that squeeze out tend to block passages or restrict them.

a 1/16th x 1/16th inch round bead is plenty excessive...next time shave the nozzle more carefully for a diagonal tip with a 1/16th inch hole that will let you flatten the bead a little. with no paper gaskets you should be able to scrape some of that rtv off the sealing surfaces and look at just how thick it is across those sea's of rtv...that might give you a better idea of how thick you actually need to apply it.

tighten slowly and carefully inching down on final tq to allow the rtv to flowout.

ive run across a coule cores that were assembled with excessive rtv and the passages blocked internally on either the fresh air side or the pcv side
 
I will be trying less rtv next time it is apart ^^

I am pretty sure I have a vacuum leak again as the car kind of accelerates by it self in the lower rpms at times. My initial vacuum leak if I put the car in neutral when it tried to "drive it self" it would stay around 3k. Now it is around 1.5k rpm.

Any other insight on the pcv would be great!
 


If your front PCV is blocked, you need to run a hose from your oil cap to your intake after your maf and before your TB

This is what I use
IMG_20150509_172444.jpg
 
Ridin ON Chrome said:
If your front PCV is blocked, you need to run a hose from your oil cap to your intake after your maf and before your TB

This is what I use
IMG_20150509_172444.jpg
Click to expand...

This is exactly what I was thinking but I was told other wise. Well I was half right I suppose (as I wanted to put it around my iat area)(before the maf) If you can take a look at this link. Both are acceptable? One better than the other?

http://www.grandprixforums.net/thre...and-with-vented-oil-cap?p=1347516#post1347516

Side note....do you have a sealed oil fill cap or is that partially vented with a port on the side? Which you can find at local auto parts stores. Curious.
 
Can't go in to the left of the IAT at the spot designed for the evap, because it's post TB plate. You need pre TB plate and post maf. This way you don't read the air as coming into the engine (it's already in the engine), and you control it's flow into the engine for throttle.
 
Same thing I did with mine. I ended up using some random barbed fitting and screwed it into the oil filler neck.

CAM00156.jpg


20141111_144514_zps9qva7zuh.jpg
 
You must log in or register to reply here.
Back
Top