New Melling m72 Oil pump plug installed wrong?

[cawcislo]

Was just looking over my new Melling m72hv oil pump and noticed the pressure spring plug looks to be installed backwards? My regular Melling pumps and my old high volume pump the plug is installed the other way? Covid quality control?

 

[cawcislo]

Checked the rock auto page and their images shows the plug installed the other way. Guess I’ll be sending it back.

 

[kursplat]

looks like all the ones i've bought over the years

 

[xLURKxDOGx]

Was just looking over my new Melling m72hv oil pump and noticed the pressure spring plug looks to be installed backwards? My regular Melling pumps and my old high volume pump the plug is installed the other way? Covid quality control?

View attachment 1715566882

View attachment 1715566883

Why would it be in there any other way? Have assembled freeze plugs or oil galley plugs before? They’re in the the same way.

Jake

 

[Garrett Ellison]

If anything it will give a little extra relief spring pressure.

 

[kursplat]

Why would it be in there any other way? Have assembled freeze plugs or oil galley plugs before? They’re in the the same way.

Jake

try driving a plug in backwards

 

[Jadaharabi]

How to Install a High Press Spring in a Small Block Oil Pump | For A Bodies Only Mopar Forum
How to Install a High Press Spring in a Small Block Oil Pump

 

[jimjimjimmy]

there was a batch back in the 90's with the plug in backwards , i had one it had 100 psi at idle and when i would rev it up it would balloon the filters . there are other threads on here about this same problem . But i can't remember which way is right .

 

[Jadaharabi]

The cup goes in.

It's the opposite of putting a freeze plug in the side of a block.

 

[yellow rose]

The cup goes in.

It's the opposite of putting a freeze plug in the side of a block.

^^^^^^THIS^^^^^^^^

 

[xLURKxDOGx]

How to Install a High Press Spring in a Small Block Oil Pump | For A Bodies Only Mopar Forum
How to Install a High Press Spring in a Small Block Oil Pump

Interesting. Seams like all the one’s I’ve had were wrong then. Didn’t notice high pressure either.

Jake

 

[pishta]

Take it out and put it back in the way you like. Save yourself shipping.

 

[cawcislo]

Take it out and put it back in the way you like. Save yourself shipping.

in order to remove the plug you have to mangle it. So you would need a replacement plug. So yes it can be corrected with a little work and a new plug.

 

[67Dart273]

PLEASE do NOT go by photos you find on parts websites. They are "representative" photos

 

[Inertia]

Drill a hole in plug, sheet metal screw and vice-grip.
Braze hole, install correctly, (not the way it came) .

 

[RustyRatRod]

Solve the whole problem. Put a big block in it. Their relief valve is retained by a screw in plug. Simple stuff.

 

[yellow rose]

Solve the whole problem. Put a big block in it. Their relief valve is retained by a screw in plug. Simple stuff.

Always the problem solver RRR. I appreciate that.

 

[RustyRatRod]

Always the problem solver RRR. I appreciate that.

S'why I'm here old buddy. lol

 

[Krooser]

PLEASE do NOT go by photos you find on parts websites. They are "representative" photos

Like dating sites...

 

[cawcislo]

I get it, but that photo from rock auto is actually correct/accurate and shows the proper way the plug should be installed and the way it is installed on three other Melling oil pumps I have kicking around.