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i agree with bestgen, those valve cover bolts are inch/lbs torque, most people over tighten them, and that first pic was an excellent example of over tightened valve cover nuts, in most cases, when over tightened, rockers hit on valve cover
EDIT: Adding some weird thinking... So if the soft rubber grommets are too soft, and as I tighten the nuts, the rubber compresses and I don't "feel" the spec'd torque amount, so I keep tighening. With the stiffer style grommets, they don't compress and when tightening the nuts, I can "feel" them getting tight against the cover and nuts. Does that make sense?
I'm sort of jumping into this discussion without reading everything, but it sounds like the speculation is that you're getting noise because you over tightened some bolts that eliminated the required clearance with internal parts. My thought while reading some of the posts was what I think you're getting at here. If the grommets failed while being tightened they would allow more compression and you wouldn't be able to achieve the same torque with the expect cover clearance.Maybe Chris is correct for what's causing the noise, but instead of it being an issue of over tightening the bolts is an issue of the grommets failing as they were tightened.
I did that myself once and didnt realize i had done it, valve adjusters were tapping on the inside of the cover. Hopefully thats it but if not I would drop the pan and check the rod bearings just to be sure.
I’ll do a test to see if the sound changes when I pull the spark plugs one at time with engine warm and idling.
If you do that, the sound will definitely change. it will go from normal motor with exhaust to open header LOL
Maybe the leak was the rear half-moon plug.........
I usually start with the #4 valve because it's the hardest to get at and the one you get to when the engine is coolest, to get the quietest adjustment possible on that one. With all the valve cover stuff you've been doing your oil leak, like emsvitil said, is most likely the half moon. Lousy luck on those grommets.
The cover doesn't bend or deflect when you overtighten.When you overtighten, you squash the perimeter seal and the whole rocker cover is closer to the rocker arms.
... Did You use the engine builder rear main seal and rear main plate gasket. I have to say it again "Don't use the engine builder gasket set"I sure hope You didn't use their timing cover gaskets. If so You can expect that to be the next leak. Hang in there Gnarly.....
Everyone always talks about half moons leaking. I'm with you in that I've never had a leaky half moon. Maybe you could pick up those aluminum half moons from 22RE Performance?
Well... I'm open to whatever works.. the cost is NOTHING when I get an oil leak... I HATE LEAKS!!I would like to ask Jim at 22RE Performance why they are selling an alloy replacement to the rubber ones... I have to guess that they know something I do not.Gnarls.
Glad to hear it was nothing worse than that... It would be bad to rebuild an engine only to find a leaky rear main.Here's to another several hundred thousand miles on your new engine...
Because they apparently don't leak and are reusable
man, that's great you didn't have to pull the tranny again. Have you listened to the injectors themselves on your stethoscope? My 92 seems to have way louder injectors than my 85 had. I thought I had drivetrain noise and tried chasing it down for quite a while until I decided to listen to the injectors themselves and they tick loud
3rz comes factory with aluminum half moons. Aftermarket company probably saw that and went with it.
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