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While I have the engine out for bottom bearings, I'm putting in a Melling high volume pump and front sump pickup. Of course the pickup didn't come with bolts, so these are temporary. Problem is, this sure don't look right!
Is this really correct for this application or did I get a wrong part from Summit?
Seems wrong, I am remembering your setup to have that curved around one that almost picks up right under the pump, and the screen faced down, like it actually will draw oil in, that one I am not sure what it does.
Seems wrong, I am remembering your setup to have that curved around one that almost picks up right under the pump, and the screen faced down, like it actually will draw oil in, that one I am not sure what it does.
Correct-the pump I pulled out had the pickup welded to the bottom and the factory mount plugged
I think the front sumps are press in fit except for the police and cj pumps which have bolts.. but they both lay flat just above the bottom of the pan.. Sometimes on overhaul they will weld them to the pump for extra peace of mind.. I'm pretty sure your pump is for a rear sump pickup..
Last edited by wdfp; 01-16-2017 at 02:15 AM.
Reason: additional info
Wdfp is correct. This is the type of pickup that is in mine. They are just press fit and they are usually just tacked in with a bead of weld to assure they don’t fall out. Whoever did yours must have been practicing for welding shop. There is just usually a simple bead on there.
Wdfp is correct. This is the type of pickup that is in mine. They are just press fit and they are usually just tacked in with a bead of weld to assure they don’t fall out. Whoever did yours must have been practicing for welding shop. There is just usually a simple bead on there.
Thanks, Fast, for the info. If the M84b I ordered doesn't fit correctly, I'll now know what to look for
Not trying to hijack your thread or question your part selection, but I too was going to put a HV melling (high volume) pump in my 390, and after a ton of reading and evaluating my install and all the opinions given I decided to go with a new standard volume pump... . Is your block modified for the increase in oil volume ? Is this something you already have experience with and is a good fit for your engine ? My reasoning was "welp more oil has to be better !" turns out that's not always correct ... I ended up taking my pan back off, spending hours cleaning all the RTV I just put on and installing a standard pump..... If you have already researched the HV pump and its a good match for your situation than please ignore this post, if not, do some reading and asking around, might save you some heartache down the road.........................
Not trying to hijack your thread or question your part selection, but I too was going to put a HV melling (high volume) pump in my 390, and after a ton of reading and evaluating my install and all the opinions given I decided to go with a new standard volume pump... . Is your block modified for the increase in oil volume ? Is this something you already have experience with and is a good fit for your engine ? My reasoning was "welp more oil has to be better !" turns out that's not always correct ... I ended up taking my pan back off, spending hours cleaning all the RTV I just put on and installing a standard pump..... If you have already researched the HV pump and its a good match for your situation than please ignore this post, if not, do some reading and asking around, might save you some heartache down the road.........................
As far as I know, the block is stock as far as the oiling system is concerned. But I've only had the truck three or four years, and the engine has been rebuilt (at least partially) in the years prior. I've read about high-volume pumps sucking the pan dry, but I don't think that's likely to happen with a low RPM front sump 460. If you can provide more data, I'm open to it.
I did order both the high volume and the standard pumps. The summit site warned that the high volume might not fit without modification of the pan. Wanting to get this back together, I simply ordered both and will return the other.
Today I picked up the high volume. It came with a pickup screen, but not the driveshaft. I test fit the pump with screen attached, and it fits nicely, with about 1/4"-3/8" clearance from the sump to the pan. I determined this by laying a 3/8" extension across the top of the pickup. The pan rocked on it, but slightly. I replaced the extension with a 9/16" wrench, and the pan set flush (without a gasket). Since the high volume clears and fits nicely, I expect the standard volume will also.
The standard volume will come tomorrow or Thursday. Assuming it fits as well, I can install either this weekend, so I've got time to consider the options.
What did strike me, however, is that the shaft seems too long. In test fitting, using the shaft, the pump sits about a millimeter off the block. I thought that perhaps the new shaft was longer than the old, or the new pump had a different drop to it, but I threw the old pump and shaft back on, and it still was high. I find it very unlikely that something fell into the recess of the distributor. Very odd. I doubt that cutting or grinding the hardened shaft would be a good idea...
That shaft fitment is strange, I do recall researching the play in the shaft when installed and its around 1/4", which seems crazy when your moving it up and down, but its correct.
As far as the HV pump, there are a million opinions on the subject, and with your rear sump deep pan, I doubt sucking the pan dry is a legitimate concern. What scared me off were the concerns regarding additional work for the distributor gear and pump shaft. Also it was recommended by some motor shops to drill out small holes in the oil passages to give additional lubrication to the dizzy shaft area ? Again this was my first build and im by NO means an expert by any stretch of a drunk mans imagination, but I had just spent every weekend for 6 months chipping away on my 390 and the last thing I wanted was to drop that engine in and have a problem with the dizzy, shaft, oil pan, etc..... and I wasn't going to start drilling holes in the block.
So for me the peace of mind was with the standard oil pump.... and I know there are loads of forum members with decades of wrench experience running HV pumps, but I lack the experience and thus the confidence to 'hope' it works out. And there are definitely applications that call for HV pumps, like external oil coolers, high RPM racing motors, etc....
"Another thing is that higher volume oil pumps put much higher loads on the gears that are driving them, meaning the distributor and cam gears. Chevy engines can handle the higher loads of high volume oil pumps just fine, where most Ford's have troubles. Why? Chevy's use a much larger gear than a Ford does, in fact, it's about twice the size, which means it's about twice as strong. The distributor gear is what takes the load of spinning the oil pump. The more volume you pump through an engine, the more load gets put on that gear." Are high volume oil pumps OK to run on the street?
01-14-2017, 03:03 PM
High Volume Pump ?
. Is your block modified for the increase in oil volume ? Is this something you already have experience with and is a good fit for your engine ? My reasoning was "welp more oil has to be better !" turns out that's not always correct 
... I ended up taking my pan back off, spending hours cleaning all the RTV I just put on and installing a standard pump..... If you have already researched the HV pump and its a good match for your situation than please ignore this post, if not, do some reading and asking around, might save you some heartache down the road......................... 
and I know there are loads of forum members with decades of wrench experience running HV pumps, but I lack the experience and thus the confidence to 'hope' it works out. And there are definitely applications that call for HV pumps, like external oil coolers, high RPM racing motors, etc....