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06-30-2020, 10:28 AM | #1 |
Senior Member
Join Date: May 2010
Location: Norway
Posts: 298
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G28T center cam bearing oiling?
I now have my rebuilt G28T block and bottom end on the bench, and as always i go through the oil passage system.
These are as some of you know full pressure B type block, they have a solid top oil pump like commonly used on modified regular A and B blocks. so my question is how does the center cam bearing get lubrication when the oil pump is sealed of on top and the only hole into the cam bore is where the drive meets the cam, this is above that sealed of level. Thanks. |
06-30-2020, 11:53 AM | #2 |
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Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,089
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Re: G28T center cam bearing oiling?
I've never done a G-28, but have pressurized many B blocks. I didn't realize the pump didn't exhaust like on a B. A small amount of oil will go thru the upper bearing of the pump, maybe enough? Is there a hole in the galley to that brg.? You could file a very small flat on the upper end of the pump if you think it necessary. There must be a way, put in at the factory, those engines lasted a long time. I ground a cam for one years ago and was surprised the original cam had the Model A profile, not the B. This engine was out of a farm machine of some sort so maybe they did the cam to have the torque curve where they wanted it???
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06-30-2020, 12:42 PM | #3 |
Senior Member
Join Date: May 2010
Location: Norway
Posts: 298
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Re: G28T center cam bearing oiling?
Hi Jim! I was thinking about filing like that too, i see no way it will get pressure otherwise.
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07-01-2020, 11:44 AM | #4 |
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Join Date: Jun 2010
Location: Temecula, CA
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Re: G28T center cam bearing oiling?
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