Full-flow oil filter conversion for V-8
Posted by Craig Hendrickson On 2009/7/16 10:25:53
The purpose of this modification is to convert the oil filtering system on the 1955-56 Packard V-8 from bypass type (partial) filter to full flow (100%) filter.
The original oil/vacuum pump and bypass filter with plumbing is removed. In this version of the modification, the oil pump is replaced with the Oldsmobile 455 oil pump using the oil pump adapter kit developed by members of the Packard V-8 Club and currently sold by the author. The following steps presume that the Olds pump and adapter kit is available.
I will separate the instructions into four posts and will allow time between posts for others to post their comments and questions.
Part 1 of 4:
The engine must be stripped to the bare block and cleaned.
There are an existing pair of holes in the block near the pan rail between the #6 and #8 cylinders . They were originally used for the vacuum line from the vacuum pump on the bottom of the original oil pump. The new Olds pump has no provision for the vacuum pump and it is not used. Normally, one would just plug these two holes. Except in the case of the a full flow oil filter conversion, these holes are enlarged and retapped.
The original size is 1/8NPT. Drill both holes out with a 1/2 in drill. 1/2in will be the minimum internal diameter of all fittings and hoses in the conversion. Then drill both holes part way with 37/64in drill so they may be tapped for 3/8NPT. Keeping the drill perpendicular to the block mating surfaces may be facilitated by constructing a couple of simple, one time use jigs. Tap the holes with 3/8NPT tap.
Attach file:
(28.09 KB)
(29.38 KB)
(32.52 KB)
(28.51 KB)
The original oil/vacuum pump and bypass filter with plumbing is removed. In this version of the modification, the oil pump is replaced with the Oldsmobile 455 oil pump using the oil pump adapter kit developed by members of the Packard V-8 Club and currently sold by the author. The following steps presume that the Olds pump and adapter kit is available.
I will separate the instructions into four posts and will allow time between posts for others to post their comments and questions.
Part 1 of 4:
The engine must be stripped to the bare block and cleaned.
There are an existing pair of holes in the block near the pan rail between the #6 and #8 cylinders . They were originally used for the vacuum line from the vacuum pump on the bottom of the original oil pump. The new Olds pump has no provision for the vacuum pump and it is not used. Normally, one would just plug these two holes. Except in the case of the a full flow oil filter conversion, these holes are enlarged and retapped.
The original size is 1/8NPT. Drill both holes out with a 1/2 in drill. 1/2in will be the minimum internal diameter of all fittings and hoses in the conversion. Then drill both holes part way with 37/64in drill so they may be tapped for 3/8NPT. Keeping the drill perpendicular to the block mating surfaces may be facilitated by constructing a couple of simple, one time use jigs. Tap the holes with 3/8NPT tap.
Attach file:
(28.09 KB)
(29.38 KB)
(32.52 KB)
(28.51 KB)
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