Melling 55 oil pump spring

[John D.]

I can't seem to find the GM correct oil pump spring #03814903. For a Melling 55 pump to get the correct oil pressure to pass PV. I looked at GM Part on line, etc. I have in my notes that it was a good number as of May 23, 2016

Is this still a good number Joe Lucia?
Or do I have the wrong part number? Thanks, John D

[Richard M.]

Re: Melling 55 oil pump spring

John, Until Joe checks in I did a quick search. Appears to be a good number. I'm uncertain of the application but Joe will know. .... Rich

https://www.gmpartsdirect.com/oem-parts/gm-f--s-spring-3814903

[Joe L.]

Re: Melling 55 oil pump spring

I can't seem to find the GM correct oil pump spring #03814903. For a Melling 55 pump to get the correct oil pressure to pass PV. I looked at GM Part on line, etc. I have in my notes that it was a good number as of May 23, 2016

Is this still a good number Joe Lucia?
Or do I have the wrong part number? Thanks, John D

John-----

As far as I can tell, it's still a currently available part. Of course, it's possible it's been very recently discontinued and the system has not "caught up yet".

This spring is applicable to all small blocks with standard pressure oil pumps (which are the VAST majority of small blocks).

[Bob W.]

Re: Melling 55 oil pump spring

John I picked one up from Gm a few months ago . In fact my local Chevy dealer had it in stock. If you can't find one let me know.

Bob

[John M.]

Re: Melling 55 oil pump spring

John,
The Melling p/n that's closest is 55049, 49psi, Summit racing, $6 for 4 pcs.
JB

[John D.]

Re: Melling 55 oil pump spring

Thanks everyone. Actually the spring is not for me for a customer preparing his 62 for PV. His oil pressure is sky high. He's using the Melling 55 (don't know which spring from the two that came with it). Much appreciated. I will pass the word on. John D.

[Joseph L.]

Re: Melling 55 oil pump spring

I purchased #3814903, earlier this year from my local Chevy parts dept. It did have to be ordered and took about a week to arrive.

[Gene M.]

Re: Melling 55 oil pump spring

I requested from Melling a spring to reduce the pressure to original manufacturer spec’s by e mail. The spring I got from Melling was still too high of oil pressure. Had to customize it removing 3/32” to get correct pressure. Been working as expected ever since. This is a bit of a pain draining oil, dropping the pan and pump to make it “correct”. I don’t know of a better way to insure the gauge reading is where it needs to be. But when not having the original these are the typical expectations today.

[Michael M.]

Re: Melling 55 oil pump spring

This is how they were packaged two years ago when I ordered it from my local Chevrolet dealership.

[Duke W.]

Re: Melling 55 oil pump spring

I don't understand why Melling can't get its act together and supply an OE equivalent 40-45 psi relief spring for the standard volume OE replacement pump. This has been going on for decades, but it's a good reason to disassemble and inspect OE pumps, which is a simple job, and 90 percent of the time they should be okay for reuse and not require any new parts.

Duke

[Joe L.]

Re: Melling 55 oil pump spring

I don't understand why Melling can't get its act together and supply an OE equivalent 40-45 psi relief spring for the standard volume OE replacement pump. This has been going on for decades, but it's a good reason to disassemble and inspect OE pumps, which is a simple job, and 90 percent of the time they should be okay for reuse and not require any new parts.

Duke

Duke------


I don't see why, either. However, this is the exact type of thing that can happen with aftermarket replacement parts.

As far as oil pumps go, the main thing that "kills" them is folks not changing their oil. Bearings, too.

[Terry M.]

Re: Melling 55 oil pump spring

Duke------


I don't see why, either. However, this is the exact type of thing that can happen with aftermarket replacement parts.

As far as oil pumps go, the main thing that "kills" them is folks not changing their oil. Bearings, too.

I too don't understand why so many people do not change the engine oil in a timely manner. It is the least expensive path to long engine life. Oil is quite laterally the life blood of the engine and timely oil changes with a quality fluid are simple and inexpensive.