Vac Leak... Bad S/C gasket?

[al2000gtp]

Alright so ive got this vacuum leak that ive been trying to fix for a little over a week now and i cant get it. I replaced all the vac lines, checked the egr tube into lim, and taken brake cleaner and sprayed it all over everywhere and cant find anything. Ive also just this last weekend cleaned the t/b and the maf. The t/b was covered in carbon and so was the inlet of the S/C. I am starting to think that when the guy installed my new engine he just took the S/C off of my old engine and dropped it on the new one without using a new gasket, but the only fluid that is leaking is s/c oil right below the snout(noticed this while i was changing vac lines) Old engine never had any problems with leaking s/c oil so this is why i think he didnt replace the gasket or it just didnt seal right but either way what im wanting to know is if you guys think this could help the vac leak and what all am i going to need to pull the s/c off and put it back on.
I know i will need a new gasket, coolant o-rings, and a torque wrench and some s/c oil and i think im gonna change the coupler and port it while i have it off also but is there anything else im missing and is there any certain pattern that the bolts need to be tightened back down or anything like that?

[mick777wauchope]

There is not a gasket to begin with. You just need to tighten the screws, which are a pain to do for some. You are better off taking the whole thing off, cleaning it out, and putting it on correctly, and filling it with s/c oil. Are you going with the green ZZPerformance coupler? Also, if your car is over 100k miles, you may have to rebuild your snout, because once you go past 100k miles, they usually start acting up, and the last thing you need is it seizing.

[gtpeddie]

there is no gasket between the snout and gears, there is a gasket under the whole supercharger. use silicon to seal the snout dont tighten the bolts to much or you will strip them, they are supposed to be torqued down not tightened till it stops leaking

[al2000gtp]

Thanks guys and i know that there is no gasket between the gears and the snout, i was meaning the gasket that goes under the s/c and i am planning on pulling the whole thing off and cleaning it and porting it before i put back on. i was asking if i had the right idea on everything i would need to take it off and put it back on and if there was any pattern i needed to follow to torque the bolts back down. i believe the bolts need 17 lbs but correct me if im wrong. will high temp red rtv work to seal the snout and the gears? oh and yes i plan on getting the green s/c coupler from zzp. one more thing, are there any ill effects porting the s/c would have on the engine if i dont have it tuned right away. Trying to eliminate all of my little problems like my ltft's and my vac leak before i get it tuned. My s/c does have more than 100 k on it but i didnt have any problems with any leaks until the mechanic i had install my new engine took my s/c off of my old engine and put it on the new one and now that it is leaking led me to believe he didnt replace the gasket under the s/c and am really hoping this could be the cause of my vac leak unless the snout and the gears separated a lil bit while he was removing it and doing the swap but the day i picked up my car he said all he had to do was unbolt the s/c and kept it all in one piece including the t/b and just dropped it on the new engine. i didnt think to ask at the time if he used a new gasket or not just kinda figured he did but after examining the job he did on everything else(like all of my cracked vacuum lines he threw back on) i thinking he just half assed everything

[matt5112]

there is no gasket between the snout and gears, there is a gasket under the whole supercharger. use silicon to seal the snout dont tighten the bolts to much or you will strip them, they are supposed to be torqued down not tightened till it stops leaking

Anaerobic sealant is the correct sealant for the joint between the case and the rotor pack and the rotor back to the snout.

[al2000gtp]

alright got my s/c off and got the rotor pack out of the case. i got 2 questions though...
1. Is there a special way to get the snout to separate from the gears because i cant get mine too.
2. What can you use to clean the rotor pack that wont hurt the coating on the rotors?

[matt5112]

1, there are three spots for prying IIRC.
2. Super clean on a rag seems to have worked well. However I'm sure carbon coated rotors will produce more boost.

[al2000gtp]

Thanks and are your being serious about the rotors?

[matt5112]

I used super clean, cleaned them up very nicely. Coating is still in tact.

I can't see how removing material from the rotors would be beneficial in terms of sealing.

[al2000gtp]

So would it be better to just leave the rotor pack alone and just worry about cleaning the case? Again i really appreciate all the help matt. Pretty new to all of this stuff.

[matt5112]

I'd just leave it alone and clean the outside then paint it.

Prevent further corrosion.

[al2000gtp]

yeah i have plans to paint it and hopefully port it using a bridgeport at work but im gonna clean all of the carbon build up out from the inside of the case first.

[al2000gtp]

Could one of you guys post a pic of your ported s/c so i can get a good idea of how much to take out?

[Ultra440]

I've seen some pics floating around on here and/or 3800 pro. I think you basically get rid of the v-shaped portrustion on one of the shorter sides (the only side that has it)

[BillBoost37]

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BillBoost37
Boosted

Album Supercharger
go the far back of the album and you'll find them. Then there's some more under "second" subalbum

[FriboRage]

I think it's recommended to stuff the back of the case with cloth or tissues or something as to not get metal shavings in the needle bearings at the back of the case?

http://www.grandprixforums.net/porti...ger-26003.html

There's a how-to thread on it.

[matt5112]

Tape over the holes would be ideal.

[Scottydoggs]

if your leaking sc oil from under the snout, chances are they used the old gasket or worse, im willing to bet your leaking oil from the bolt that goes straight down into the lim from the snout. my gasket broke when i did my coupler, and i just loaded the bolt threads with rtv and it sealed it up.

but being that your going to take it off a new gasket should fix you all up. vac leak and fluid leak wise.

[al2000gtp]

Thanks a lot guys and yeah it didnt look like he had put new gasket under there and it was leaking from the bolt that goes through the snout down into lim. Really hoping this does fix up both the vac leak and fluid leak. I got one more question for you guys though... towards the back of the lim there are grooves or pockets not really sure how to describe them but the dont go down into the lim. The one all the way on the left side is filled with oil and the one next to it on the right is filled with gas. i know how i got the one filled with gas, had an injector pull out of the fuel rail while removing it because it was missing the metal clip to hold it in there. but i am not sure where the oil came from. Its not s/c oil, it looks like brand new fresh motor oil. Is this supposed to be there and if not where is it coming from?

[Scottydoggs]

i would be guessing your valve cover is leaking. as there is no other source of motor oil up top there.