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Old 07-01-2019, 11:45 AM
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ddversatile ddversatile is offline
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Join Date: Oct 08, 2017
Location: Alberta
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327 Cam Bearing Help

Hey guys recently finished rewiring my 68' Gladiator from the cab back and I'm now ready to assemble the engine, however I have forgotten the orientation of the cam bearings inside the block prior to removing them from the block

The bearing journal on the 327 has two oiling ports on it. One coming from the top of the engine from the main oil gallery and the other leading down towards the crank bearings. It also features a deep groove that encircles the bearing, allowing I believe oil to pass around the cam bearings down to the crank

Currently I have installed 3/5 of the bearings and now I'm questioning my judgement. The bearings have only one oiling port in them, and I have them oriented facing downwards at the crank.

I question my judgement since if the oiling port is on the bottom but the engine supplies oil from above would the cam not get lubricated

Next time I will ensure I take pictures

If I have explained this weirdly please refer to this sketch https://scontent-sea1-1.xx.fbcdn.net...&oe=5D827B 91

If anyone knows the correct orientation or if they can take pictures of their 327 it would be very very appreciated. Thanks,
dd
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1968 Jeep Gladiator J-3000 327 Vigilante V8, currently overhauling it, T-18 transmission, Dana 20 Transfer Case (will get a rebuild+twin stick), Dana 44 full float in the front and semi float 53 in the rear. 4.09 axles
1972 GMC 1500 basket-case (300$ buy )
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Old 07-05-2019, 01:20 PM
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tgreese tgreese is offline
 
Join Date: May 29, 2003
Location: Medford MA USA
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Hi - I understand your question. Typically the factory service manual (FSM) contains both a diagram of the oil path through the engine, and a description of how the oil travels to the lifters and bearings. I do not have FSM that covers the 327, but there is some info here - http://jubileejeeps.org/327/index.htm From my quick reading of this info, it does not appear that oil goes through the cam bearing and on to the mains. Maybe... If you can't get a better response here, I'd suggest you ask on the AMC car sites. The 250/287/327 used in the AMC cars is the same engine that is in your Jeep.

Quoting the above,

Oil is returned from the oil filter to the main central longitudinal oil gallery. All camshaft and main crankshaft bearings are lubricated from the center longitudinal oil gallery. Holes drilled in the crankshaft throws afford lubrication to the connecting rod bearings. Low speed cylinder wall lubrication is obtained through small holes or channels in the parting surface of the connecting rod and bearing caps.

http://theamcforum.com/forum/forums.html

http://www.bjsoffroad.com/1965-1971-...al_p_1055.html
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Last edited by tgreese : 07-05-2019 at 01:35 PM.
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Old 07-11-2019, 10:51 AM
ddversatile's Avatar
ddversatile ddversatile is offline
232 I6
 
Join Date: Oct 08, 2017
Location: Alberta
Posts: 33
Quote:
Originally Posted by tgreese
Hi - I understand your question. Typically the factory service manual (FSM) contains both a diagram of the oil path through the engine, and a description of how the oil travels to the lifters and bearings. I do not have FSM that covers the 327, but there is some info here - http://jubileejeeps.org/327/index.htm From my quick reading of this info, it does not appear that oil goes through the cam bearing and on to the mains. Maybe... If you can't get a better response here, I'd suggest you ask on the AMC car sites. The 250/287/327 used in the AMC cars is the same engine that is in your Jeep.

Quoting the above,

Oil is returned from the oil filter to the main central longitudinal oil gallery. All camshaft and main crankshaft bearings are lubricated from the center longitudinal oil gallery. Holes drilled in the crankshaft throws afford lubrication to the connecting rod bearings. Low speed cylinder wall lubrication is obtained through small holes or channels in the parting surface of the connecting rod and bearing caps.

http://theamcforum.com/forum/forums.html

http://www.bjsoffroad.com/1965-1971-...al_p_1055.html

I do in fact have that TSM . And the information you've quoted is about all that is in the tsm, however
A fellow on AMC Forum sent me this



It looks like the bearings should be oriented with the holes facing upwards towards the oil gallery to give as much lubrication to the cam as possible, as there is a channel around the bearings that brings the oil down towards the crankshaft bearings anyhow.
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1968 Jeep Gladiator J-3000 327 Vigilante V8, currently overhauling it, T-18 transmission, Dana 20 Transfer Case (will get a rebuild+twin stick), Dana 44 full float in the front and semi float 53 in the rear. 4.09 axles
1972 GMC 1500 basket-case (300$ buy )
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