Melling m316 oil pump

mike diesel

mike diesel

I'm alright.
Sep 6, 2012
4,005
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SLC, Utah
So i ordered a melling m316 oil pump for my build. I thought I had seen alot of people used them and like them. Hence why I ordered one

Now after ordering I find a few people who have had issues with them. Mostly just high oil pressure. The description said "standard volume/pressure". Is there any technique to managing the high oil pressure? Open the piston squirters a bit to keep pressure down? Or should I not worry about it?

Should I ditch the melling pump for an oem pump? I am slightly concerned now.
 
Dmax87

Dmax87

Member
Dec 3, 2013
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Not positive on bumping pressure down, maybe a different oil check valve/regulator. I personally wouldn't mess with the spray jets, those need to hit a specific spot on the piston for cooling. Also how would you know if you took to much out or not enough until the engine was running.
 
S

S Phinney

Active member
Aug 15, 2008
4,008
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28
Quncy, Fl
I highly doubt you will have a problem with it unless you are n in a extremely cold climate. Then just plug in the block heater and it will be okay or run lower viscosity oil
 
mike diesel

mike diesel

I'm alright.
Sep 6, 2012
4,005
0
36
SLC, Utah
S Phinney said:
I highly doubt you will have a problem with it unless you are n in a extremely cold climate. Then just plug in the block heater and it will be okay or run lower viscosity oil
Click to expand...

That was what i was thinking, switch to full synthetic 5w40.

If it takes 150 psi or so to pop the filter then I won't worry about it. Worse case, I put a restrictor in the turbo feed line to prevent any seal damage (if that's even a concern).

I will key the gear to the shaft to prevent any further issues too.
 
moparkxracer

moparkxracer

Well-known member
Jun 25, 2010
2,309
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Out and about
I wouldn't open the oil squirters, Ya youd drop pressure. Not sure if anyone has looked into the return flow out of the piston you'd be squirting all the oil into, yes I know hot oil is thin. Also when you spray fluid out of the stock ones it's more of a controlled spray when you spray fluid outbid the drilled one it's not so much. They sell an aftermarket bypass of the pressure is too high. I'd key the pump and hope it's a reverse threaded one. Just my opinion.

If someone has had issues with a pump I'd think twice abt using it.
 
Awenta

Awenta

Active member
Sep 28, 2014
4,090
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CT
Everything has had at least one issue at one point. Just saying.

Sent from my SM-N910V using Tapatalk
 
dirtymax36

dirtymax36

2nd place is last
Apr 11, 2013
367
2
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I would have the gear and pump keyed. Stay with stock piston oilers and this pump and you should be good to go.
 
stealthy_max

stealthy_max

New member
Jan 10, 2015
27
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Midwest
Taking a rabbit trail here.... What's a good weight of oil to run in a built motor? I'm running HX bearings. I've always run AMSOIL 15w40, and been really happy. The inside of the motor was one of the cleanest I've ever seen!
 
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skintback

skintback

Take this one to church
Mar 5, 2007
919
0
16
Florida
How much oil pressure are ya'll seeing with this oil pump and what's the cost?

What does it pump hot at idle? And say hot driving at 2000rpm's running 15w40 oil

I have a socal pump that runs 30psi hot idle and 2000rpm's driving down the road hot is like 65-70psi that is with 15w40 and i drilled out all 8 oil jet check ball/springs so the jets are open all the time worked out great for me been like that for over 5 years and about 70k miles that's feeding two turbos also

The only problem i have is cold start up it will go to about 115-120psi for a few mins then slowly come back down have to let it idle for 10min or so before you think about going anywhere and yes i know socal sales a bypass but i have lived with it this long and i don't feel like adding anything else to the truck that may leak or brake lol
 
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