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RE: More news rE: 428 Oil Pressure Problem

By Ross - 01/03/2001 10:57:27 AM; IP 64.12.101.162

Thats common. Tops of rod bearings wear, bottoms of mains, think how pressure is applied during combustion. Piston pushes the rod down wearing top bearing, rod pushes crank down and the mains hold it there.

I would reassemble, making sure you drill the oil pump galley from the pump to the filter housing to 1/2, or at least 7/16. Run a Melling HV-57 or equivalent, a good set of bearings and check the mains for oil hole alignments.

Then run a restrictor in the head to limit oil to the top. I cant see any problems occuring.

Low oil pressure is generally either cam bearings or mains, so make sure you have new cam bearings, and make sure the clearances on the mains are good. If they arent have the crank turned, also if you turn the crank have them bevel the oil holes on the crank before polishing, just cheap insurance. . If I remember the original post you said this motor didnt have many miles on it. I'd also have the main saddles align-bored or at least checked. I sent you a copy of an email that I sent to someone else on AOL for oil mods, basically a rewrite of what I said here

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Collapse <a href=../ForumFE/reply.aspx?ID=4030&Reply=4030><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor4030" onclick="return false;">428 Oil Pressure Problem</a> -- <font color=#0000ff>John, <i>01/01/2001</i></font><script type="text/javascript">
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428 Oil Pressure Problem -- John, 01/01/2001

Collapse <a href=../ForumFE/reply.aspx?ID=4035&Reply=4030><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor4035" onclick="return false;">RE: 428 Oil Pressure Problem</a> -- <font color=#0000ff>RJP, <i>01/02/2001</i></font><script type="text/javascript">
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RE: 428 Oil Pressure Problem -- RJP, 01/02/2001

Collapse <a href=../ForumFE/reply.aspx?ID=4045&Reply=4030><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor4045" onclick="return false;">More news rE: 428 Oil Pressure Problem</a> -- <font color=#0000ff>John, <i>01/02/2001</i></font><script type="text/javascript">
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More news rE: 428 Oil Pressure Problem -- John, 01/02/2001

RE: More news rE: 428 Oil Pressure Problem -- Ross, 01/03/2001

Collapse <a href=../ForumFE/reply.aspx?ID=4054&Reply=4030><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor4054" onclick="return false;">What do your cam bearings look like?</a> -- <font color=#0000ff>Dave Shoe, <i>01/03/2001</i></font><script type="text/javascript">
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What do your cam bearings look like? -- Dave Shoe, 01/03/2001

Collapse <a href=../ForumFE/reply.aspx?ID=4102&Reply=4030><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor4102" onclick="return false;">RE: What do your cam bearings look like?</a> -- <font color=#0000ff>John, <i>01/07/2001</i></font><script type="text/javascript">
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RE: What do your cam bearings look like? -- John, 01/07/2001

RE: What do your cam bearings look like? -- Dave Shoe, 01/07/2001

Oil mods -- Ross, 01/03/2001