Melling M155 Oil Pump
Melling M155 Oil Pump Just wondering how many of you are running this particular oil pump. I think this is the oil pump that people claim the casting is weak. I have heard that this oil pump is not to be used on a high performance application. I need to replace my oil pickup because it fell off and I have the m155 with the new casting. Should I spend the money and purchase the melling select 10554 oil pump? It is $100 compared to $40 and they both do the same job. How many of you have seen the evidence of the m155 cracking? Has anyone experienced this?
TECH Veteran
Joined: Dec 2008
Posts: 4,147
Likes: 62
From: Little Rock, AR
The select series does have the better case but the gears are not forged like the old ones. I believe they are Powdered Metal if I recall after speaking to a melling engineer. Sounds substandard to me. Im ditching my M55HV. Not gonna take any chances.
I went with the melling select series pump in mine for a couple reasons...
Its a pain to get to if you need to replace it and if does break the $50 you saved on the pump wont cover the bill for the new bearings and gaskets and all that you will tear up..An oil pump is something you don't want to cheap out on!
Good luck
Matt
Its a pain to get to if you need to replace it and if does break the $50 you saved on the pump wont cover the bill for the new bearings and gaskets and all that you will tear up..An oil pump is something you don't want to cheap out on!
Good luck
Matt
Trending Topics
How many of the regular m155's have cracked due to installation in a performance application? What makes them crack? Word is that if you use solid motor mounts that it will cause the casting to crack due to excessive vibration. I can't see how anything else would cause it.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
My engine builder just put the M155 pump in my new engine with the white pressure relief spring. I asked him about using the select series pump because I had heard of the M155's cracking in the neck area. He told me that Melling had fixed the problem, I guess I'll find out for sure once the engine is in the car.
My engine builder just put the M155 pump in my new engine with the white pressure relief spring. I asked him about using the select series pump because I had heard of the M155's cracking in the neck area. He told me that Melling had fixed the problem, I guess I'll find out for sure once the engine is in the car.
Yeah no thanks. My builder put the M55HV in mine and I did enough reading that Im changing it out. I am going to a Titan pump as I can get a good deal on one. Im also having jeff johnston of billet fabrications make me a one off custom pan to go with it. Its not cheap but I will have a bad *** oil pump and pan!
