z ya Posted March 14, 2003 Share Posted March 14, 2003 Well, I put the intake manifold back on the other night. Freshly cleaned surface with carb cleaner. 1/4 " bead black rvt front and rear. Well, its doesnt leak were it used to now it leaks in the area right behind the distributor. Whats next? Pull it off again! Maybe I should try the cork ends or rubber ends?? If I use them should I put gasket maker on both sides ,one side or no side?? I also think I am going to try some factory GM gasket stuff. Man I am getting SOOO frustrated with this thing. Quote Link to comment Share on other sites More sharing options...
Guest the_dj Posted March 15, 2003 Share Posted March 15, 2003 I did the exact same thing 3 days ago. Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted March 15, 2003 Share Posted March 15, 2003 You have to use a big bead of rtv on the front and back. I would not use those crappy rubber sticky gaskets..you talk about leaking. Also did you put the gasket in for your distributor? That could be why. Mike Quote Link to comment Share on other sites More sharing options...
dmyntti Posted March 15, 2003 Share Posted March 15, 2003 I agree with zfan. You need a fairly thick bead os silicone on the block as there will be a gap between the intake and the block. Also be careful when dropping the manifold in place, it is hard to put straight down without the intake scraping some of the silicone off of the block. I have heard of people sealing an end gasket intake leak by cleaning the area and laying a bead of silicone over the area without removing the intake. This would not be my preferred method but if it saves removing the intake again it might be worth a try. Just clean the area good first. There really isn't much pressure trying to cause a leak in this area, it is just a hard place to seal. Quote Link to comment Share on other sites More sharing options...
quicker240 Posted March 15, 2003 Share Posted March 15, 2003 I had a little leaking problem a while back similar to you,the problem turned out to be not the way i was sealing the intake,instead,not having adequate crankcase ventilation.that intake seal is probably the weakest seal on a SBC.excess crankcase pressure,especially at higher RPMs WILL cause an intake leak.Make sure you have good crankcase ventilation through both valve covers through the PCV valve or vent filters on BOTH sides,this will greatly reduce pressure on all your seals and reduce leak problems .good luck with it! Quote Link to comment Share on other sites More sharing options...
z ya Posted March 15, 2003 Author Share Posted March 15, 2003 Thanks guys Quote Link to comment Share on other sites More sharing options...
z ya Posted March 15, 2003 Author Share Posted March 15, 2003 Well, I just went and picked up another set of intake manifold gaskets and some GM blk rvt sealant. I will give it another go........ Quote Link to comment Share on other sites More sharing options...
z ya Posted March 15, 2003 Author Share Posted March 15, 2003 Oh, also changed to k&n style breathers on both side for crankcase pressure relief. Quote Link to comment Share on other sites More sharing options...
z ya Posted March 17, 2003 Author Share Posted March 17, 2003 I put the intake back together and am praying for a leak free set up. After reading quicker 240's response I am starting to think this is the major issue that is causing the leaks. I remember that when I was using the k/n style filter breathers before I would get some oil dripping out of the filters. And yes the valve covers had baffles. I think that by running a pcv it will help suck out some of the pressure as opposed to just breathers? What do you guys think???? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 20, 2003 Share Posted March 20, 2003 I suggest a crankcase breather. This will ofset that terriffic blowby you have ..... LOL Quote Link to comment Share on other sites More sharing options...
Owen Posted March 20, 2003 Share Posted March 20, 2003 I went thru this too, 3 or 4 times in one day. Tim240z finally advised me to seal the end gap from the outside which I did and haven't had problems. I just cleaned as much oil from the manifold - block gap, blew it out with compressed air, wiped it down with acetone, etc to get it as dry as possible. I then took a glob of silicone on my finger and forced it into the gaps. Owen Quote Link to comment Share on other sites More sharing options...
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