What’s the part number for the go to oil pump? In the past, I always used the Melling high volume, I think the part number is M-22Fvh. I recall a discussion here about the oil pumps that include different regulator springs, same number? And what about the bolt on pickup for the 8 quart pan? Thanks.

 

Matt - I'd have to look it up, but when I replaced my oil pump in my 1971 CS 350 I ordered the Melling OEM replacement pump. The pump came with two springs - one was normal spring for normal volume and the other spring was for high volume. I used the high volume. IIRC, one spring was GREEN the other spring PURPLE. Both springs came with the pump & you chose which to use.

EDIT: I ordered & replaced the pickup and new screen at the same time. Can't recall any numbers, sorry. They went together like clock work though. Really happy with the Melling products.

 

I looked it up. I did use the M-22FHV, but I used the pressed-on pickup not the bolt-on. After I pressed on the pickup I think I was maybe 1/4" off the bottom of the oil pan. Fit like a champ.

 

 

I’m using a 8 quart Milodon pan so I definitely need the deeper pickup. The engine currently has a modified Toronado pan with the halfshaft hump removed.

Just trying to use as much leftover parts as possible.

 

Doesn't the different spring just change the internal relief PSI to bypass sooner/later?

In order to increase the volume, the displacement of the pump needs to increase...yes/no?

 

Just to add to the discussion- I had the 468 rebuilt in 2020. It was apart last year for a dropped valve (again). Upon removal of the oil pump, I found a brown colored spring with the builder's shim that looked to be about 3/16". The engine ran normally around 40psi hot, falling below 20 at idle. I ordered a new pump; it came with a green spring installed, and a pink spring as an option. I immediately installed the pink spring and the aforementioned spacer. Cold fire up netted a new high pressure rating of 85psi over the previous 60. I haven't driven it yet, but expect to see higher hot idle pressure than previously.

* This is all with Melling 22HV pumps and Canton pan/pickup. Various weights of Brad Penn oil have been used (SAE 30 break in, 10w-30, 10w-40, 15w-40), but they never made much difference in pressure readings.

 

Yeah, the most I saw out of factory pump and pan was 70 psi. Now with the purple spring in the Melling high volume oil pump, Canton pick up and pan, 80+ psi cold with 5 QT 10W30 and 1QT 20W50, 6 QT total VR1. The lowest oil pressure hot, coolant at 185 is 35 to 40 on my fresh 358 idling at 700 rpm.