dsommer Posted March 29, 2004 Share Posted March 29, 2004 Damn this is going to be long.... So I've got an oil leak on the back side of my engine, it's not coming out of the main seal, futher investigation show it's out of the rear of the intake manifold, (Edelbrock performer RPM). Tear it down put it back together...Fire it, still an oil leak. Buddy comes over... it could be the plug (drivers side UNDER the cylinder head) we pull it down, yank the plug and it's got a galled (sp) thread (the head is off at this point) get new plug, seal it, put 1/2 enging back together over the course of a week. Fired it today and let it idle for 15+ min. NO leak GREAT!!! Take it for a spin, get back to the house and the engine is PISSING oil all over the rear of the block again arrrrrggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh son of a bitchhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh. So enlighten me. Oh come on, if you know PLEASE ANSWER WHY IT'S DOING THIS TO ME!!! Here is my thought too much pressure in the crankcase, I've got a PCV in the passenger side valve cover but it's not enough to pull the pressure out to keep the oil from getting past the seal (it's blowing by the front too!!!) So I've got a set of Moroso breathers I'm about to go and drill the VC to accept right now, so any other thoughts???? David (I'm pissed but sill amused) BTW I drove a 350Z on Saturday (yawn!!!) sure it handles GREAT but . damn it anin't got nowhere near enough power. I'll keep my 240 until I build my FFR Spyder. d Quote Link to comment Share on other sites More sharing options...
80LS1T Posted March 29, 2004 Share Posted March 29, 2004 So its pushing the front intake and rear intake gaskets out? Not pulling them in right? Guy Quote Link to comment Share on other sites More sharing options...
dsommer Posted March 29, 2004 Author Share Posted March 29, 2004 I'm not trying to dismiss you but gaskets (ahem) at this point, screw em. (I'm using a thich ass bead of silicone ultra gray on the front end and back end of the intake, AND I let them cure for 48 HRS!!!) It's the ENDS of the intake (F/R), initially that are leaking/seeping) I followed David Vizard book "How to rebuild your small block chevy" and put some sealant on the rubber gaskets... then the other day Grumpyvette posts this: http://hybridz.org/nuke/index.php?name=PNphpBB2&file=viewtopic&t=32460 I'm like HELL YEAH thats the problem...NOPE (after reinstalling the intake manifold) I pull the head, the plug on the drivers side behind the cylinder head, WTF is it there for any way??? After a romping joy ride, OIL, frigging OIL everywhere. I'm about to get 5 gal of gas and set this MF on fire, I'm at the end of my rope, so much work, trying to get it ready for the Branson show/cruise and I'm back at the starting line. HELP!!!!!!!! d Quote Link to comment Share on other sites More sharing options...
80LS1T Posted March 29, 2004 Share Posted March 29, 2004 Well the reason I was asking if it was pushing them out and not pulling them in, is because if it was pulling them in that might indicate an intake leak from the inside from the pan that is on the bottom of the intake. Can you feel pressure coming out of the oil fill hole in the valve cover? There should be some but not too much. Guy Quote Link to comment Share on other sites More sharing options...
A. G. Olphart Posted March 29, 2004 Share Posted March 29, 2004 It sounds mightily like you are pressurizing the crankcase, so your new breathers should help. A person can take a prick punch to the block surface where the gasket sits to get more bite... something I've rebuilt had holes in the block surface for tits on the gasket to drop into, and other gaskets have had rails. Drilling holes and a LONG cure time might help with your silicone home made gasket. Have you ever tried the 'right stuff' gasket making goo in a can? comes out like cheese whiz & stuck well for me to make my own pan gasket. (I did have everything absolutely dry and oil free). Does the oil pressure sender sit back in that area? I've had them puke all over everything. HTH Quote Link to comment Share on other sites More sharing options...
Pyro Posted March 29, 2004 Share Posted March 29, 2004 I think you have four choices. 1. valve cover 2. intake 3. oil pressure port 4. distributor It sounds like you did the intake right (thick bead of silicone). So you need to wash off the oil drive it for a few minutes and get a good look where it is going from. You should use cork gaskets on the valve covers (rubber sucks) Make sure you have a gasket under the distributor Make sure the oil pressure line for the oil pressure port is not leaking. Quote Link to comment Share on other sites More sharing options...
dmyntti Posted March 29, 2004 Share Posted March 29, 2004 I had this problem on my truck when I put the engine in. It turned out that when I put the engine in I let it lean back to far and bumped the fitting from the oil pressure guage on the firewall and damaged it so it leaked (alot). It looked just like an intake manifold leak and I almost pulled the intake until I noticed the damaged fitting. Quote Link to comment Share on other sites More sharing options...
dsommer Posted March 29, 2004 Author Share Posted March 29, 2004 Well, Good advice from you guys As far as gaskets: Both valve covers have cork gaskets, they are the Trick Flow valve covers which have a nice thick flange so they arent leaking. Distributor has new gasket. Oil pressure sending unit is screwing in good and has some sealant on it also. I didn't reuse any gaskets all are brand new. I'm going to drill the VC tonight and probably pull the Oil P sending unit and see what happens next It's just disheartening when you put so much work into something and you think you have the problem fixed then you find out it's still broke ds Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted March 29, 2004 Share Posted March 29, 2004 You could find a cheap air pump and use it to pull air from one cover, I did that on a trooper I had. Dunno what effect it had on the crank case pressure but it never leaked. Quote Link to comment Share on other sites More sharing options...
72zcar Posted March 29, 2004 Share Posted March 29, 2004 This is a long shot but here it goes... I had an oil leak that drove me nuts (i mean frigging nuts) and it turned out to be the accessory bolt hole on the passenger side of the 350. The top one goes clear threw to the stock location of the fuel pump. At idle it wont pump oil..only till 2500-3000 rmps. I know u said intake but i was thinking maybe the fan was pushing the oil up there, i know with my motor it got everywhere till i plugged it with a short bolt. Not all sbc have this accessory hole going into the stock fuel pump area. Quote Link to comment Share on other sites More sharing options...
dsommer Posted March 29, 2004 Author Share Posted March 29, 2004 72Zcar Oh, Oh, Oh I already fixed that one, my buddy told me about it yup, it was leaking. The reason I "think" it's internal pressure is because it's seeping oil past the FRONT galley plug, just a little bit, a very little bit but it's there. David Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted March 29, 2004 Share Posted March 29, 2004 putting a vent in both vc's should do it. I kept blowing pan gaskets in a 350 because I didn't want to put holes in my VC's. I guess whatever is the weakest will blow first to releave that preasure. Quote Link to comment Share on other sites More sharing options...
rick phillips Posted March 30, 2004 Share Posted March 30, 2004 dsommer i don't know where i read this, it may have been on this site, but it worked for me. with the intake off use a punch to make several small indentions on the edge of the block before putting your gasket material on you might also make the indentions on the intake manifold it gives the gasket material something to "bite".it worked for me hope it helps rick Quote Link to comment Share on other sites More sharing options...
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