When did Chevy start using long water pump?

With the exception of the models mentioned above, long water pumps started in 1969 and ran on engines with standard v-belt drives into the 1980s when belt-drive systems became more complex.

What year did Chevy go to long water pump?

Long Water Pumps

Starting in 1969 GM moved to the long water pump for cars and 1973 for light trucks. The long water pump appears similar in design to the short water pump, however, it has longer cast “legs” that move the main body of the pump away from the engine.

What is the difference between a long and short water pump on a big block Chevy?

Typically the small block Chevy (SBC) short pumps were used on '68 and earlier passenger cars and light duty trucks. With the exception to Corvettes, the SBC long water pump was typically used on '69 and up passenger cars and light duty trucks.

Do I need a high flow water pump?

"Generally speaking, higher flow and higher pressure is beneficial to the cooling system," he told us. "Higher pressure in particular raises the boiling point of the fluid, thus decreasing the likelihood of vapor forming in the coolant. This results in better cooling, rounder cylinders, cooler valves, etc.

Will a new water pump improve performance?

Fuel Savings and Noise Reduction

While the amount of the efficiency loss is small, it's fair to say that replacing an older water pump can lead to a small increase in engine efficiency and fuel economy. A new water pump can also reduce engine noise. Again, older pumps likely have a bearing with some wear and tear.

Chevy short/long water pump, how to identify which one you have

What is the flow rate of a car water pump?

Amazingly, a typical automotive water pump can move up to 7,500 gallons of coolant per hour and can recirculate the coolant in the engine over 20 times per minute when operating at peak RPMs. This means your vehicle's water pump operating at peak capacity could empty a typical private swimming pool in about an hour!

What Chevy came with a short water pump?

Except for trucks and Corvettes, all models from 1955 through 1968 had short water pumps.

What is hub height on a water pump?

A: “Hub height” is the industry term for measure a water pump's height. The hub height is a critical belt-alignment dimension determining where the water pump pulley belt groove(s) fall in relation to your crank, alternator, power steering pump and air conditioning pulley grooves.

What is a reverse rotation water pump?

A REVERSE rotation pump rotates the opposite direction of the crankshaft. • Water pump pulleys running on the INSIDE surface of the belt indicate a STANDARD ROTATION water pump. • Water pump pulleys running on the OUTSIDE surface of the belt indicate a REVERSE ROTATION water pump.

What will happen if pump rotation direction is reversed?

If rotation is backwards, the impeller and acorn nut can spin off in just a few seconds, causing damage to the pump's components such as the bearings or seals. This could completely destroy your centrifugal pump if undetected.

Can a water pump run backwards?

A common myth is that in reverse rotation, the pump causes backward flow, that is, IN the discharge and OUT the suction. In reality, a pump operating in reverse rotation because of wiring or phase change will pump in the normal direction. Now, it won't pump very well. Its flow will be reduced, as will its head.

How does a Chevy water pump work?

The water pump is a simple centrifugal pump driven by a belt connected to the crankshaft of the engine. The pump circulates fluid whenever the engine is running. The water pump uses centrifugal force to send fluid to the outside while it spins, causing fluid to be drawn from the center continuously.

How do you measure water pump rotation?

Rotation is indicated on the head of the pump, you'll see an arrow going counter-clockwise. This is the direction you want the pump spinning. If you turn the motor around and look at the backside and remove the cap, you'll see a shaft located in the center.

Are electric water pumps Streetable?

And as those at Moroso and Meziere believe, and as many enthusiasts have found, electric water pumps can be right at home on your high-performance street car just as well as they can on a dedicated drag car.

When must a thermostat be fully opened?

until the engine is warm. When the engine is cold, the coolant will not flow through the engine. As the temperature rises, however, the thermostat slowly begins to open. By the time the engine reaches approximately 200 degrees Fahrenheit, the thermostat will be open entirely.

How much pressure does a car water pump put out?

This pressure varies with engine rpm when a crank shaft-driven pump is used; An electric pump maintains a constant pressure or varies the pressure related to engine temperature. System pressure can be as high as 40psi or more at the engine outlet/cylinder heads or as low as 5psi at the pump inlet during idle.

At what mileage should a water pump be replaced?

Typically, the recommended interval for replacing the water pump is every 60,000 to 100,000 miles, depending on various factors, such as the car model, road and weather conditions, and driving behavior. Therefore, if you plan to invest in a used car, ensure you verify whether the seller replaced the water pump.

Do you have to replace timing belt when replacing water pump?

Generally, the idler pulleys, tensioner and water pump should always be replaced when the timing belt is replaced. In most cases, the timing belt drives the water pump, so it is the right time to replace the water pump.

How often should timing belt and water pump be replaced?

The timing belt and water pump will need to be changed in line with the manufacturer's recommendation; this is normally every 60,000 miles. Most people change both components at the same time to save on costs and time.

Can backflow damage a pump?

If a pump is operating in parallel with other pumps and there is no check valve present, a reverse flow could be induced when a single pump is shut down or fails. The reverse flow may spin this pump backwards and damage it or the pump driver.