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Oil leak from back of heads #1847085
06/12/15 12:29 AM
06/12/15 12:29 AM
Joined: Apr 2009
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Toronto
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mshred Offline OP
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mshred  Offline OP
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Toronto
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.

Re: Oil leak from back of heads [Re: mshred] #1847182
06/12/15 04:40 AM
06/12/15 04:40 AM
Joined: Jan 2003
Posts: 19,375
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
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Las Vegas
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?


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Oil leak from back of heads [Re: mshred] #1847190
06/12/15 08:22 AM
06/12/15 08:22 AM
Joined: Mar 2006
Posts: 9,849
MI, usa
dvw Offline
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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

Re: Oil leak from back of heads [Re: mshred] #1847295
06/12/15 12:30 PM
06/12/15 12:30 PM
Joined: Oct 2012
Posts: 235
Gilbert AZ
tsanchez Offline
enthusiast
tsanchez  Offline
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Gilbert AZ
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

Last edited by tsanchez; 06/12/15 12:31 PM.
Re: Oil leak from back of heads [Re: mshred] #1847318
06/12/15 01:10 PM
06/12/15 01:10 PM
Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61 Offline
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justinp61  Offline
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W. Kentucky
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.

Re: Oil leak from back of heads [Re: mshred] #1847402
06/12/15 03:06 PM
06/12/15 03:06 PM
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Posts: 3,415
Toronto
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mshred Offline OP
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mshred  Offline OP
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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!

Re: Oil leak from back of heads [Re: mshred] #1847416
06/12/15 03:21 PM
06/12/15 03:21 PM
Joined: Feb 2005
Posts: 20,185
PA.
pittsburghracer Offline
"Little"John
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PA.
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.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Oil leak from back of heads [Re: pittsburghracer] #1847586
06/12/15 07:39 PM
06/12/15 07:39 PM
Joined: Apr 2009
Posts: 3,415
Toronto
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mshred Offline OP
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mshred  Offline OP
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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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