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Oil leak from back of heads

Posted By: mshred

Oil leak from back of heads - 06/12/15 04:29 AM

I am 99% certain that there is oil leaking from the back corner of my passenger side head on my small block. I have checked the intake and valve covers both by feel and by looking at them, and they are DRY. I am running Indy 360-2 heads that were finished for cometics, which I am running, but my current deck surface never was finished for the mls gasket. I sprayed all three layers with the copper high tack stuff before I installed and torqued to spec. I installed the heads and gaskets last summer, and never re-torqued them since. It is only my passenger side head doing this, and it is leaking enough that it leaves a small puddle after shutting the car off, which to me is somewhat serious.

Will re-torquing the studs do the trick possibly??? I really don't want to have to remove the heads in the car if I don't have to, but this leak is serious enough that I need to do something about it. I always thought that both sides were always somewhat moist on the side of the block from the heads, so I am going to re-torque both sides. Can't remember if I need to pull the rockers off or not, and I am hoping just loosening off the TTi's and dropping them down a little will give me enough room. Going to the track Saturday and have to get this done tomorrow.
Posted By: Al_Alguire

Re: Oil leak from back of heads - 06/12/15 08:40 AM

It cannot hurt to try retorquing them. It would be very odd for them to leak oil from there and not anything else, but anything is possible. Is there anyway you can pressurize the engine or have access to a smoke machine?
Posted By: dvw

Re: Oil leak from back of heads - 06/12/15 12:22 PM

Put a small amount of air in the crankcase. Seal the breather. The leak will show up immediately. I used my leak down tester to regulate the air. Dizuster and I both found leaks very quickly this way recently. Mine were at the intake/deck/head junction. Right at the edge where the head gasket ends. Pulled the intake and had to make sure that RTV was forced into that area.
Doug
Posted By: tsanchez

Re: Oil leak from back of heads - 06/12/15 04:30 PM

I have indy amc heads , maybe similar issue but I had a oil leak at rear, thought it was intake or heads and turned out one of the accessory mount holes in head was drilled too far, just stuck a bolt in it.

Same heads puked coolant out the valve cover bolts, had to put a threaded
plug in the hole
Posted By: justinp61

Re: Oil leak from back of heads - 06/12/15 05:10 PM

Have you checked your oil pressure line/fitting? I don't see a head gasket leaking oil there. Spray it clean with carb or brake cleaner and after it dries start it and watch.
Posted By: mshred

Re: Oil leak from back of heads - 06/12/15 07:06 PM

So it looks like I over reacted a bit and should have done some more investigating. I grabbed a small mirror to look at the back of the head/intake area and it looks like the oil is coming from there and dripping down. I had taken everything I needed off last night to re-torque the heads, so I did that anyways and all of them were still bang on.

I would have done the intake today since I have the time but I have no intake gaskets left since I just re-sealed it about 2 weeks ago....Called up Indy to order some (man are they miserable over there!!!) and in the mean time I gobbed some Right Stuff back in that crevice where the leak is after cleaning it really good in hopes it will help slow the leak down a bit. Still gonna hit the track tomorrow, but Im gonna keep a close eye on it.

Thanks for the suggestions guys!
Posted By: pittsburghracer

Re: Oil leak from back of heads - 06/12/15 07:21 PM

Good-luck this weekend and I hope the rain holds off for you. If possible you might want to make up a small catch-all diaper just in case. Easier at home than at the track on a hot day.
Posted By: mshred

Re: Oil leak from back of heads - 06/12/15 11:39 PM

Originally Posted By pittsburghracer
Good-luck this weekend and I hope the rain holds off for you. If possible you might want to make up a small catch-all diaper just in case. Easier at home than at the track on a hot day.


Thanks John! weather is supposed to be good! I am all loaded up and ready to go for the morning...I might just go out there and make something up, good idea, thanks!
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