425 oiling
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Registered User
Joined: Feb 2007
Posts: 8
425 oiling
Greetings Olds Fans.I was told that I will need to upgrade the oiling system if I go high performance with my 425.What is needed?Do I need restrictors?
I am thinking 6 or 7 quart oil pan high flow pump and windage tray.Will this be enough?
I am thinking 6 or 7 quart oil pan high flow pump and windage tray.Will this be enough?
Junior Member
Joined: Oct 2004
Posts: 2,212
From: Southern CA
Main bearing clearances = .003”
Rod journal clearance = .002”
Rod side clearances = .018”
Restrict the oil flow through the pushrods.
Drill a ⅛” hole in each cam bearing, 180° from the existing one, and install them upside down.
High volume pump.
7 or 8 quart pan with 5 or 6 quarts of 10w50, with a Fram HP2 filter.
Forget the windage tray.
Norm
Rod journal clearance = .002”
Rod side clearances = .018”
Restrict the oil flow through the pushrods.
Drill a ⅛” hole in each cam bearing, 180° from the existing one, and install them upside down.
High volume pump.
7 or 8 quart pan with 5 or 6 quarts of 10w50, with a Fram HP2 filter.
Forget the windage tray.
Norm
Old(s) Fart
Joined: Mar 2007
Posts: 50,540
From: Northern VA
Registered User
Joined: Mar 2007
Posts: 1,727
From: Tracy Ca
I would not put pipe cleaners in the push rods, just would not want to take a chance? Probably the worst the could happen would be a pluged up rocker arm? The one post about redrilling the cam bearings, makes sence. The machine shop I use also says, he has off set the oil hole on the cam bearings. I have the restricked push rods in my 70 W30.
Junior Member
Joined: Oct 2004
Posts: 2,212
From: Southern CA
Yep. You might be remembering this thread.
From post #21.
Your choice.
Not possible.
Norm
From post #21.
........ Lifter bore restrictors have been used with solids for about as long. Pipe cleaners were commonly used to restrict pushrods until Mondello started selling his “store bought” versions.
For the $112 difference, I’ve always used the cheaper method and have had no problems .........
For the $112 difference, I’ve always used the cheaper method and have had no problems .........
Not possible.
Norm
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