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Melling Stock Replacement OE Type High Volume Oil Pump
1 yr replacement if defective
How Would You Like To Get This Item?
Store Pickup
Same Day Home Delivery
Home Delivery
Product Information
Product Details
Part No. M155HV
Warranty Details (1 YR REPLACEMENT IF DEFECTIVE)
Made in USA. Melling high volume oil pumps increase the amount of oil flow by an average of 20% through the engine improving oil pressure at idle providing dependable performance every time in every application. Every Melling high volume oil pump is engineered and assembled to the highest production standards from high quality materials. All Melling high volume oil pumps use the latest in gear and gerotor technology to provide the highest level of quality and performance. High volume gears are machined to close tolerances to ensure proper engine pressure and correct, efficient pump operation. End plates are precision ground for maximum wear resistance. Every Melling oil pump is individually tested for pressure and flow under conditions designed to duplicate actual engine operating conditions.
Product Features:
Product Features:
- Manufactured from high quality materials for consistent durable wear
- Precision engineered for optimum fit and function
- Designed for long-life and worry-free performance
- High volume oil pump supplies additional oil to engines when necessary for high performance applications or low oil pressure issues
Specifications
Additional Volume Over Stock Percentage:
25%
Drive Type:
Drive Shaft
Gear Type:
Spur Gear
Grade Type:
OEM Improved
Height:
4.49 in
Mounting Hole Diameter:
0.250 in
Mounting Hole Quantity:
2
Oil Pump Pressure Type:
Standard Pressure
Oil Pump Volume Type:
High Volume
Pickup Tube Diameter:
0.72 in
Width:
3.30 in
4.2 out of 5
10 Customer Reviews
100% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
6
4 Stars
2
3 Stars
1
2 Stars
0
1 Star
1
Pros
2
Improves Engine Efficiency
1
More Oil Volume
Cons
6
No
1
Extra Load On Engine
1
Stock screen doesn't fit
1
none
Most Liked Positive Review
Great price for brand name product
Best value of any vendors I checked with.
Most Liked Negative Review
Returned to store
Not much to say on it's performance because I had to return it & swap for stock volume. It's a '00 GMC Jimmy 4.3 V6 4x4 with the cast aluminum oil pan. Couldn't seem to get the proper 3/8 clearance between pan & screen - couldn't even get 5/16 - so back to the store it went. Figured the HV pump would give me a bit more engine life, since I cheaped out and skipped on doing the crank & big-end bearings, but it's a daily driver - mostly stock except it's got an Edelbrock carb instead of FI, so don't really need the HV anyway. Will be installing the stocker (Melling) in it's place.
Reviewed by 10 Customers
Great price for brand name product
Verified Buyer -
Best value of any vendors I checked with.
Bottom Line Yes, I would recommend to a friend
good pump increased oil pressure
Verified Buyer -
Helped improve oil pressure. More oil flow in the top end make sure you purchase the hardened pump shaft it doesn't come with the pump
Bottom Line Yes, I would recommend to a friend
Be sure to buy the screen and shaft
Be sure to buy the melling oil pump screen part# 258S and the steel shaft. The stock oil pump screen from my 2003 Chev Express 1500 4.3l has a different tube size from the high volume melling pump, so I've had to return the store to get it. Also, you must buy the steel shaft to replace the stock shaft Part No. IS-55E
Bottom Line Yes, I would recommend to a friend
Returned to store
Verified Buyer -
Not much to say on it's performance because I had to return it & swap for stock volume. It's a '00 GMC Jimmy 4.3 V6 4x4 with the cast aluminum oil pan. Couldn't seem to get the proper 3/8 clearance between pan & screen - couldn't even get 5/16 - so back to the store it went. Figured the HV pump would give me a bit more engine life, since I cheaped out and skipped on doing the crank & big-end bearings, but it's a daily driver - mostly stock except it's got an Edelbrock carb instead of FI, so don't really need the HV anyway. Will be installing the stocker (Melling) in it's place.
Bottom Line Yes, I would recommend to a friend
I will buy more and more
Verified Buyer -
Outstanding
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