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Hemi Help OIL IN COOLANT #1702980 11/24/14 08:15 PM 11/24/14 08:15 PM
Joined: Jan 2003 Posts: 3,103 Phila Pa S scatpacktom OP master
scatpacktom OP master S Joined: Jan 2003 Posts: 3,103 Phila Pa	A friend of mine called and said that his Hemi is pumping 2 qts of oil into the cooling system by the time he gets around the block. Engine is a fresh build with high comp, big stroke, roller cam bearings ect ect. The block is a Mopar piece from say the 90s. Any experience with something like that? I have my own ideas on where to look but I wanted to see if this lit up any light bulbs.

Re: Hemi Help OIL IN COOLANT [Re: scatpacktom] #1702981 11/24/14 08:37 PM 11/24/14 08:37 PM
Joined: Jan 2003 Posts: 7,475 Minnesota Hemi_Joel master
Hemi_Joel master Joined: Jan 2003 Posts: 7,475 Minnesota	That really stinks when something like that happens on a new build. Could be a head gasket.(hopefully)Did he use copper gaskets? Knowing the lack of qc on those early blocks, it's probably a flaw in the block. [img]http://i.imgur.com/boeexFms.jpg[/img] 31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"

Re: Hemi Help OIL IN COOLANT [Re: Hemi_Joel] #1702982 11/24/14 10:22 PM 11/24/14 10:22 PM
Joined: Mar 2006 Posts: 9,809 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,809 MI, usa	A freind had an aftermarket block recently that the oil feed passage to the head was into the coolant passage. Easy to diagnose. Remove the oil pressure fitting at the back of the block and plumb shop air to it. Ours blew coolant all over. Ended up pulling the heads and watching for bubbles. Just below the deck on the right side the passageway broke through into the coolant passage. Doug

Re: Hemi Help OIL IN COOLANT [Re: dvw] #1702983 11/24/14 10:25 PM 11/24/14 10:25 PM
Joined: Dec 2012 Posts: 1,823 Wind Gap,Pa. S Sammy top fuel
Sammy top fuel S Joined: Dec 2012 Posts: 1,823 Wind Gap,Pa.	Quote: A freind had an aftermarket block recently that the oil feed passage to the head was into the coolant passage. Easy to diagnose. Remove the oil pressure fitting at the back of the block and plumb shop air to it. Ours blew coolant all over. Ended up pulling the heads and watching for bubbles. Just below the deck on the right side the passageway broke through into the coolant passage. Doug Head gasket issue

Re: Hemi Help OIL IN COOLANT [Re: dvw] #1702984 11/24/14 10:46 PM 11/24/14 10:46 PM
Joined: Jan 2003 Posts: 1,938 Sonora CA Mopar_Rich top fuel
Mopar_Rich top fuel Joined: Jan 2003 Posts: 1,938 Sonora CA	Quote: A freind had an aftermarket block recently that the oil feed passage to the head was into the coolant passage. Easy to diagnose. Remove the oil pressure fitting at the back of the block and plumb shop air to it. Ours blew coolant all over. Ended up pulling the heads and watching for bubbles. Just below the deck on the right side the passageway broke through into the coolant passage. Doug I have seen this several times with the later blocks that feed head oil directly from the galleys. I even had a KB block do this because the gun drilling drifted slightly. Fixing it however took some work because we had to epoxy in a tube.

Re: Hemi Help OIL IN COOLANT [Re: Mopar_Rich] #1702985 11/24/14 11:05 PM 11/24/14 11:05 PM
Joined: Jan 2003 Posts: 1,436 Oklahoma City OK Cudajon pro stock
Cudajon pro stock Joined: Jan 2003 Posts: 1,436 Oklahoma City OK	2 qts is a lot of oil. Could be a head gasket, but that big of a leak it ought to run like do-do. You say the block is from the 90's. Has it been run before? Is there water in the oil pan? If not then oil pressure is pushing it into the coolant. The suggestion to used air to test the block sounds good. That is really a bummer. Pull the plugs and look for signs of water in the cylinder that would be a pretty good indication of a head gasket, but not a 100% check. http://www.youtube.com/watch?v=4J3K94cRC1c

Re: Hemi Help OIL IN COOLANT [Re: Cudajon] #1702986 11/25/14 11:14 AM 11/25/14 11:14 AM
Joined: Jan 2003 Posts: 3,103 Phila Pa S scatpacktom OP master
scatpacktom OP master S Joined: Jan 2003 Posts: 3,103 Phila Pa	The trick here is to "be inside the cooling system" to see where the oil is blowing through. I'm pretty sure testing each passage individually will be the way to find the issue. I have some ideas about pressure testing the cooling system first though. Trying to get the coolant to leak into the oil would be easier to find. Odd thing is coolant doesn't leak into the engine when it isn't running. Could it be just a head gasket? I'm thinking it has to be between the cam and the rockers. Last edited by scatpacktom; 11/25/14 11:15 AM.

Re: Hemi Help OIL IN COOLANT [Re: scatpacktom] #1702987 11/25/14 01:41 PM 11/25/14 01:41 PM
Joined: Jan 2003 Posts: 7,475 Minnesota Hemi_Joel master
Hemi_Joel master Joined: Jan 2003 Posts: 7,475 Minnesota	Big Shooter, It could be a head gasket if it leaked between the oil feed for the head and the water hole in the deck. See picture: 8341555-oilhole.jpg (1702 downloads) [img]http://i.imgur.com/boeexFms.jpg[/img] 31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"

Re: Hemi Help OIL IN COOLANT [Re: Hemi_Joel] #1702988 11/25/14 01:46 PM 11/25/14 01:46 PM
Joined: Jan 2003 Posts: 7,475 Minnesota Hemi_Joel master
Hemi_Joel master Joined: Jan 2003 Posts: 7,475 Minnesota	I would pull the heads and look for a gasket problem there. If that looks good, I would blow compressed air in the oil hole and see if it bubbles in the radiator. Same thing on the head once it's off. That would indicate a crack or mis-drilled hole into the water jacket. There will be some air leakage past the #4 cam journal, but it you rotate the motor till the hole in the cam is not lined up with the oil port, it should hold air good enuff.

Re: Hemi Help OIL IN COOLANT [Re: Hemi_Joel] #1702989 11/25/14 02:08 PM 11/25/14 02:08 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	I would think if you pumped up the cooling system it would leak into the oil where you could actually see where the leak is. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Hemi Help OIL IN COOLANT [Re: Clanton] #1702990 11/26/14 04:15 AM 11/26/14 04:15 AM
Joined: Oct 2003 Posts: 2,537 PORT ALBERNI , BC., CANADA superwrench master
superwrench master Joined: Oct 2003 Posts: 2,537 PORT ALBERNI , BC., CANADA	This might be a stupid question....but IS there any possibility that the head gaskets are upside down??? The head bolt holes appear they would line up, but maybe the oil/water holes wouldn't. I say this because I had a 5.7 Hemi that I rebuilt and stupidly didn't check the gasket thoroughly when I installed one head. I had water and oil mixed REAL good !!!

Re: Hemi Help OIL IN COOLANT [Re: superwrench] #1702991 12/05/14 11:48 PM 12/05/14 11:48 PM
Joined: Jan 2003 Posts: 7,475 Minnesota Hemi_Joel master
Hemi_Joel master Joined: Jan 2003 Posts: 7,475 Minnesota	Tom, Did it ever get figured out? Enquiring minds what to know. [img]http://i.imgur.com/boeexFms.jpg[/img] 31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"

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