Mechanical Water Pumps by Engine Family

A mechanical water pump is the belt-driven pump bolted to the front of the engine - no motor, no wiring, turned by the same belt system as the accessories. This page sorts 24 in-stock mechanical water pumps from Tuff Stuff, Proform, Stewart, PRW, Milodon, Melling and Edelbrock, from $75.99 to $569.95, the way the choice is actually made: first by engine family, then by short or long design, rotation and pilot size. Every year range, hub height, pilot, inlet and rotation figure below comes from that pump’s own listing, and where a listing states nothing, this page says so instead of filling it in. Every order over $200 ships free.

OUR MECHANICAL WATER PUMP PICKS

Product	Spec (from the product listing)	Price	Why it is here
58-79 Chrysler Water Pump 383/400	Mechanical, Supercool, high volume, iron, Mopar B / RB-Series / 426 Hemi (per listing feature line)	$75.99	The floor of this page: a high-volume iron pump for the big-block Mopar family at the lowest price here.
Water Pump SBC Short	Mechanical, Stage 1, 3/4 in pilot, short design, iron (per listing)	$133.60	The classic small-block Chevy short pump in Stewart’s Stage 1 line, with the larger 3/4 in pilot stated in its listing - pilot size is a real buying difference on SBC pumps, and this page prints it for every pump that states one.
BB Chevy Long Water Pump	Mechanical, high volume, 5/8 in pilot, 1-7/8 in inlet, long design, steel (per listing)	$197.62	The big-block Chevy mid-ladder pick: Milodon states its volume class, its pilot and its inlet size in one listing, which is exactly the set of figures a BBC buyer needs before ordering.
SBF Water Pump - 70-78 302	Mechanical, Victor Series, 5/8 in pilot, aluminum (per listing)	$340.23	The premium small-block Ford pick: Edelbrock’s Victor Series pump for the 1970-78 302, from the line that also carries this page’s SBC, BBC, LS and Pontiac ceilings.
Water Pump - GM LS3 09- 16 Reverse Rotation	Mechanical, Victor Series, reverse rotation, 3/4 in pilot, short design, aluminum (per listing)	$569.95	The ceiling of this page: a reverse-rotation LS3 pump - rotation is the whole buying question on serpentine LS builds, and this listing states it in its name.

STEP ONE: SMALL BLOCK CHEVY - SHORT, LONG AND REVERSE ROTATION

The deepest shelf on this page, and the one where short versus long decides everything. Proform’s short aluminum pump ($102.99) states high flow, a 5/8 in pilot and fitment for 1955-86 Chevrolet small-block V8 (Gen I) in its listing. Stewart sells the short/long pair in iron: its Stage 1 short pump ($133.60) states a 3/4 in pilot, and its Stage 1 long pump ($139.99) states a 5/8 in pilot - same brand, same stage, different length and different pilot, printed as stated. Tuff Stuff’s reverse-rotation long pump ($97.74) states Supercool, reverse rotation, cast iron, a 6.937 in hub height and a 5/8 in pilot - and a flag: its own fitment lines disagree on the truck exclusion, reading “NOT for use on 89-95 trucks” in one line and “87-95 trucks” in another, so check the maker’s guide for your truck before ordering. Edelbrock closes the shelf with two Victor Series aluminum pumps: the long ($359.95, 5/8 in pilot) and the short with a 3/4 in shaft ($369.95). Questions before you order? Call 213-549-4279 (Mon-Fri, 9am-5pm PT) and we will read the listing with you.

STEP TWO: BIG BLOCK CHEVY - LONG PUMPS AND ONE SHORT VICTOR

Five BBC pumps, four of them long. Proform’s long aluminum pump ($116.99) states high flow, a 5/8 in pilot and 1965-96 Chevrolet big-block V8 (Mark IV, 396-454) fitment. PRW’s long aluminum pump ($119.87) is titled for 1969-87 and states high performance and a 5/8 in pilot; its description’s fitment line reads only “Big Block Chevy”, so the year range rests on the title. Stewart’s long pump ($135.99) is the shelf’s reverse-rotation entry, in iron with a 5/8 in pilot. Milodon’s long steel pump ($197.62) states high volume, a 5/8 in pilot and a 1-7/8 in inlet - the only BBC listing here that states an inlet size. Edelbrock’s Victor short pump ($399.95) is the shelf’s short design and its only standard-rotation listing stated as such, with a 3/4 in pilot and a satin powder coat finish.

STEP THREE: GM LS - TRUCK, F-BODY AND REVERSE-ROTATION LS3

Three LS pumps with three different stated jobs. Melling’s truck/SUV pump ($173.99) is titled for GM LS truck/SUV 2007-2017 and states a black pulley and a 6.942 in hub height in aluminum. PRW’s Gen III & IV pump ($219.77) states high flow, a 3/4 in pilot and “pump only” - no pulley - and its fitment line narrows the title’s broad Gen III & IV claim to GM F-Body 1997-2002; both are printed here as stated. Edelbrock’s LS3 pump ($569.95) is titled GM LS3 2009-16, reverse rotation, a Victor Series short aluminum pump with a 3/4 in pilot. It is the most expensive pump on this page.

STEP FOUR: SMALL BLOCK FORD - WINDSOR AND 5.0L

Four Windsor-family pumps split by era and rotation. Milodon’s aluminum pump ($99.95) states a 5/8 in pilot and a 1-3/4 in inlet for 289-351W - and states plainly in its fitment line that it is a universal fit, not a vehicle-specific part, so its dimensions are the fitment check. PRW’s 5.0L pump ($124.87) is titled for 1986-93 and states high performance, reverse rotation and a 5/8 in pilot in aluminum. Stewart’s 94-95 pump ($159.99) is a Stage 1 reverse-rotation iron pump titled for 221-351W applications. Edelbrock’s Victor pump ($340.23) covers the 1970-78 302 in aluminum with a 5/8 in pilot. The two reverse-rotation pumps here are serpentine-era answers; the earlier cars’ standard-rotation question is answered by checking each listing, because most of these listings do not state a rotation at all - where a listing is silent, this page is silent.

STEP FIVE: BIG BLOCK FORD AND FE

Two Ford big-block answers with a shared listing quirk worth knowing. Tuff Stuff’s FE pump ($119.99) states Supercool, high volume, iron - and its fitment lines carry two different engines with two different measurements in one listing: 390, 427, 428 FE at a 7.578 in hub height with a 5/8 in pilot, and a 429/460 line at a 5.562 in hub height with a 3/4 in pilot. Both are printed as the listing states them; measure your hub height before ordering either way. PRW’s 429/460 pump ($185.67) is titled for 1970-1992 and states aluminum construction; its listing states no pilot, rotation or hub height, and this page invents none.

STEP SIX: MOPAR BIG BLOCK - B / RB AND 426 HEMI

Two pumps for the Mopar B / RB-Series / 426 Hemi family, as both listings state it. Tuff Stuff’s iron pump ($75.99) is titled 1958-79 Chrysler 383/400 and states Supercool, high volume, a 3.078 in hub height and a 5/8 in pilot. Milodon’s aluminum pump ($108.95) states high volume and a 5/8 in pilot for the same B / RB / Hemi family, with no year range stated in its listing.

STEP SEVEN: PONTIAC AND OLDSMOBILE

The two non-Chevy, non-Ford GM families close the page. Tuff Stuff’s Pontiac pump ($98.99) is an iron 11-bolt pump titled for 1969-81 Pontiac 4.3, 5.7, 6.6L and 455, stating a 4.468 in hub height and a 5/8 in pilot - bolt count is a real Pontiac split, and this listing states its count in its name. Milodon’s Oldsmobile pump ($167.78) is titled for Olds 350-400 and states high volume, a 5/8 in pilot and a 1-7/8 in inlet in aluminum, built for Oldsmobile V8 per its listing.

AN HONEST NOTE ON WHAT IS NOT ON THIS PAGE

The parent Water Pumps range holds 548 products, and most of them are not mechanical engine pumps. Excluded: every electric water pump - 110 of the water-pump listings checked for this page state “electric” in their title or description, including the remote-mount and radiator-mount electric pumps and CVR’s Proflo Xtreme line, whose own listing states Electric; every component - spacer kits, backing plates, pump housings, pulleys, adapters and flange kits are service and fitting parts, not pumps; and the wider mechanical pool’s near-duplicates - second finishes of the same Edelbrock and Stewart pumps, circle-track variants and the PRW low-RPM line, whose listings for this run carried no description beyond the title, all stay in the parent collection, each still orderable there. Also named plainly: no GPM flow figure is printed anywhere on this page, because none of these 24 listings states one - “high flow” and “high volume” below are each maker’s own words for its own pump, not a measured comparison between brands.

QUESTIONS BUYERS ASK US

Short or long - which pump does my engine take? It is a measurement, not a model-year guess. The short and long designs differ in hub height, and the listings that state a hub height print it - Tuff Stuff’s reverse-rotation SBC long pump states 6.937 in, Melling’s LS truck pump states 6.942 in, Tuff Stuff’s Pontiac pump states 4.468 in. Measure from the pump’s mounting face to the front of the hub on the pump you are replacing and match that figure; a long pump on a short-pump accessory drive puts the pulley out of line with every other pulley on the engine.

Standard or reverse rotation? The belt decides. Reverse-rotation pumps are built for serpentine drives that turn the pump backwards compared with a V-belt drive, and the pumps here that are reverse rotation say so in their listings - Tuff Stuff’s and PRW’s SBC and SBF pumps, Stewart’s BBC and SBF pumps and Edelbrock’s LS3 pump. Edelbrock’s BBC Victor short pump states standard rotation just as plainly. Where a listing states no rotation, do not assume - ask us or check the maker’s guide for the part number, because a wrong-rotation pump moves coolant the wrong way.

Why do pilot sizes differ - 5/8 in or 3/4 in? The pilot is the shaft nose the fan and pulley center on, and both sizes appear on the same engine family: Stewart’s SBC Stage 1 short pump states 3/4 in while its long pump states 5/8 in, and Edelbrock sells its SBC Victor in both. Match the pilot to the pulley and fan you are running; the figure is printed for every pump on this page whose listing states one.

Does “high volume” or “high flow” mean one brand flows more than another? Not on the evidence of these listings. High volume and high flow are each manufacturer’s own description of its own pump - Milodon and Tuff Stuff say high volume, Proform and PRW say high flow - and none of the 24 listings here publishes a gallons-per-minute figure to compare them by. Treat the words as the maker’s positioning for that pump, and choose on fitment, rotation, pilot and construction first.

Is a pulley included? Only where the listing says so. Melling’s LS truck pump states a black pulley in its feature line; PRW’s LS pump states “pump only” just as plainly. Most listings here describe the pump alone, so plan on reusing or ordering your pulley separately unless the listing for your part number states otherwise.

Cast iron, steel or aluminum - does the material matter? It changes weight and finish, and the listings state it for every pump here: Stewart’s Stage 1 pumps and Tuff Stuff’s Supercool pumps are iron, Milodon’s BBC long pump is steel, and the Edelbrock Victor, PRW, Proform and Milodon Olds pumps are aluminum. What no listing here claims is a temperature difference between materials, so this page makes none either - choose on fitment and the construction you want on the front of your engine.

Shopping the wider range? Browse the full Water Pumps collection, read our guides on the News & Builds blog, or see the page that came before this one: Clutch Hydraulic Throwout Bearings.

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