When did Chevy switch to long water pump?

Chevy switched to long water pumps starting in 1969 for most models, except for trucks and Corvettes. Prior to 1969, all models from 1955 through 1968 used short water pumps. Long water pumps were used on small block passenger car engines from 1969 to 1987 and on light-duty trucks from 1973 to 1986. The main difference between the two types of water pumps is the length of the hub. The dimension from the engine block surface to the water pump hub is 5 5/8 inches for short water pumps. On the other hand, long water pumps measure from where they attach to the engine block to the pulley flange and are approximately 7 inches in height. It’s important to note that the diameter of the water pump shaft and pilot stub for the fixed or clutch fan is the same for both short and long water pumps, typically 5/8 inch.

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.

Are all small block Chevy water pumps the same?

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.

How long is a short water pump?

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 year did Chevy use short water pump?

All models of Chevy V8 engines from 1955 through 1968 came equipped standard with a short water pump.

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 is the difference between a short water pump and a long water pump 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 determines the size of a water pump?

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.

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.

Is big block Chevy small block Chevy water pump 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 to tell the difference between a short and long Chevy water pump?

And the shorter pump is well the short version. But it’s much easier to ID’d them on the workbench. Than it is when the pumps are mounted on the front of the motor. That’s.