Are all small block Chevy water pumps the same?

Are all Small Block Chevy Water Pumps the Same?
Small block Chevy water pumps come in two main types: short and long. The short water pump measures 5 5/8 inches from the front to the back where it mounts on the engine block to the pulley flange, while the long water pump measures 7 inches for small block engines. The long water pump is also 7 1/4 inches for big block engines. When it comes to both small and big block Chevy V8 engines, there are essentially two different types of Chevy water pumps: a long style and a short style. These measurements are crucial in determining the correct water pump for your specific needs.
The differences between the short and long water pumps can be difficult to determine with the pump off the engine, so it’s important to confirm the height of the pump for your needs. The short water pump will not allow your fingers between the pump and timing cover, while there will be a much larger gap between the pump and the block assembly for the long water pump. Additionally, some of the later style aluminum water pumps with a serpentine-belt drive system used a reverse rotation pump.
It’s important to note that the long and short water pumps have different mounting spacing, and the long pump is typically used with a serpentine-belt drive system. The long water pump is also used with the ZZ4 engine with a composite front timing cover by exchanging the bolts that hold the rear sheet metal plate to the pump with pan-head bolts. On the other hand, the short water pump must be modified to fit a water pump with a 3/4″ shaft.
In summary, small block Chevy water pumps are not all the same. They come in two main types, short and long, with distinct measurements and applications. It’s important to accurately identify the type of water pump needed for a specific engine to ensure proper fit and functionality.
If you have any further questions or need additional information, feel free to ask!

Are short and long water pumps interchangeable?

Short and long shaft pumps are not interchangeable. Here’s how to tell. Short pump is 5-3/4″ from block surface to hub. Long pump is 7-5/16″ from block surface to hub.

What size is the water pump on a small block Chevy?

Short water pumps measure from the front to the back where it mounts on the engine block to the pulley flange. They measure 5 5/8 inches for SB engines and 5 3/4 inches for BB engines.

What are the three types of water pumps?

There are three basic types of pumps: positive-displacement, centrifugal and axial-flow pumps. In centrifugal pumps the direction of flow of the fluid changes by ninety degrees as it flows over an impeller, while in axial flow pumps the direction of flow is unchanged.

Will a 350 water pump fit a 454?

You will need a 454 flexplate. The 350 accessory brackets won’t fit the 454. Water pump turns opposite direction on a full serpentine setup.

Will a 305 water pump fit a 350?

Are they the same, and i need a distributor? Re: Are 305 and 350 water pumps the same? for the most part, belt setup makes a difference though for normal or reverse flow, but that goes for either engine, so other than that yes.

Are all Chevy 350 water pumps the same?

And to answer your initial question, NO all water pumps are not the same. You can buy ‘reverse flow’ pumps, hi-volume pumps, etc. etc. But, unless you intend to race this vehicle, just put a stock water pump back on….IF you need one.

Are big block and small block Chevy water pumps the same?

One of the questions we commonly get is what water pump is right for my Chevy V8, whether it be a small block or big block Chevy. The reason for this is Chevy developed two different types of water pumps for these engines: a short-type and a long-type.

How do I know which water pump to buy?

The most important factors to consider when sizing a water pump come down to GPM/PSI ratings, inlet/outlet size for water and hoses, how high you’ll need to pump the water (measured in vertical feet), referred to as total head lift, and how far you’ll need to pump the water horizontally.

What is the difference between short and long water pumps on small block Chevy?

Due to the longer production run, long water pumps hold the distinction of having more accessory brackets, pulleys, and other hardware available for them, but obviously the short pump will save you roughly 1-3/8-inches (1.375-inch) of room, which in a cramped hot rod engine bay might be just what you need to have your …

What happens if you oversize a water pump?

Oversized pumps generate excess system flow and with throttling cause higher backpressures, this will in turn prematurely wear out bearings and seals.