Ameer Randolph
Removing a fuel filter from a Chevy Astro or GMC Safari vehicle is a relatively straightforward task that can be completed in a short amount of time. Before beginning the removal process, it is important to depressurize the fuel system by pulling the fuel pump relay. This will prevent the fuel pump from running and building up pressure, making it safer to work on the fuel filter. Additionally, spraying PB Blaster on the fittings and rusted connections can help loosen them and make the removal process easier. Once the fuel filter is removed, it is recommended to inspect the fuel lines for any signs of rust or damage before installing a new filter.
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What You'll Learn
Depressurise the fuel system
Depressurising the fuel system of a Chevy Astro or GMC Safari is a necessary step before removing the fuel filter. This is because the fuel system is under pressure, and failure to release this pressure can result in gas squirting out and potentially causing harm.
To depressurise the system, first, pull the fuel pump relay. This will prevent the fuel pump from running and building up pressure. Next, start the engine for a second. This will cause the pressure to bleed down as the remaining fuel in the lines is used.
It is also possible to relieve the pressure using a valve. Using a small Phillips screwdriver wrapped in a towel, depress the centre of the Schrader valve located on the fuel line under the engine cover to the left of the distributor.
Once the system has been depressurised, the fuel filter can be replaced. After replacing the filter, turn the key to run for three seconds, turn it off for a second, and repeat this cycle two more times. This will get the fuel close to the pump.
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Remove the fuel pump relay
To remove the fuel pump relay on a Chevy Astro or GMC Safari, follow these steps:
Firstly, locate the fuel pump relay. It is usually found under the hood on the passenger side. There should be two relays, one of which is the fuel pump relay.
Once you have located the fuel pump relay, you can then remove it. This will prevent the fuel pump from running and building fuel pressure. When you start the engine, the pressure will bleed down, using some of the fuel remaining in the lines.
Removing the fuel pump relay is a necessary step when replacing the fuel filter. It is important to depressurize the fuel system before performing any maintenance or repairs. This can be done by pulling the fuel pump relay or by using a small Phillips screwdriver to depress the center of the Schrader valve, located on the fuel line under the engine cover to the left of the distributor.
After removing the fuel pump relay and allowing the engine to stall, you can proceed with replacing the fuel filter. This process typically involves unscrewing the old filter and installing a new one. It is important to be cautious when working with fuel and to have the necessary tools and knowledge to perform the task safely.
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Spray PB Blaster on the fittings
To remove the fuel filter from your Astro Safari, you'll need to start by spraying PB Blaster on the fittings. PB Blaster is a penetrant that helps to loosen rusted or frozen parts, making them easier to remove. It's a common issue for Astro Safari fuel filters to be affected by rust, so spraying PB Blaster on the fittings is a good first step.
PB Blaster has been a popular product for this purpose since 1957. It contains a non-evaporating lubricant that not only helps to loosen parts but also protects them from further rust and corrosion. This can be especially useful for Astro Safari fuel filters, which are prone to rust due to factors like salt, snow, and rain.
Before applying PB Blaster, ensure you have purchased the correct product and that it is suitable for your vehicle. You may also want to wear protective gear, such as gloves and eye protection, to shield yourself from any chemicals or debris. Additionally, it is important to work in a well-ventilated area to avoid inhaling fumes.
After spraying PB Blaster on the fittings, allow some time for it to penetrate and loosen the rusted parts. The amount of time required may vary depending on the severity of the rust. Once the parts are loosened, you can proceed with the next steps of removing the fuel filter, which include removing the fuel pump relay and running the engine until it stalls.
It is worth noting that, while PB Blaster is a useful product, it may not always be successful in extremely rusty situations. In such cases, alternative solutions may need to be considered, such as cutting the fuel lines and repairing them or seeking professional assistance.
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Use a wrench to remove the fuel filter
To remove the fuel filter from your Astro Safari, you will need to use a wrench. The exact size of the wrench you will require will depend on the make and model of your vehicle, as well as the condition of the filter and its housing.
For example, some Chevy Astro and GMC Safari owners have reported using a 16mm or 5/8" flare wrench for the line nut, and a 13/16" combination wrench to hold the filter nut in place. However, another owner reported using a 20mm flare nut wrench specifically for their GM fuel filter.
Before attempting to remove the fuel filter with a wrench, it is important to relieve the pressure in the fuel system. This can be done by pulling the fuel pump relay and running the engine until it stalls. You can then proceed to remove the old filter with your wrench.
It is recommended to spray PB Blaster on the fittings to help loosen any rusted connections before attempting to remove the filter. Additionally, it is important to carefully crack the lines slowly and let some of the fuel drip out before completely unscrewing the lines to avoid spilling excess fuel.
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Install a new fuel filter
Installing a new fuel filter on your Astro Safari is a straightforward process, and here is a step-by-step guide to help you through it:
Firstly, ensure you have the correct tools and safety equipment. You will need a line wrench or flare nut wrench, and it is recommended to have vise grips or a metal chisel as well. It is also important to have a dry chemical fire extinguisher nearby for safety.
Next, locate the fuel filter. It is usually found underneath the driver's seat, near the frame rail. Before you begin, it is recommended to spray the fittings with penetrating oil like PB Blaster, especially if you live in an area with rust. This will make it easier to remove the old filter and install the new one.
Now, carefully remove the old fuel filter. Use the correct-sized wrench to loosen the fittings, and be cautious not to strip the nuts. If the nuts are frozen, you may need to cut through the fuel filter at the nut with a saw or use an impact socket to free them. Once the old filter is removed, dispose of it properly.
After that, install the new fuel filter. Ensure that you handle it with clean hands or gloves to prevent any contamination. Screw the new filter into place, making sure the connections are secure. You may also want to apply a small amount of anti-seize to the new filter nuts to prevent future issues.
Finally, you can start the engine and check for any leaks. Turn the key to run for 3 seconds, then turn it off for a second, and repeat this cycle two more times. This will help prime the fuel pump. Once complete, start the engine and check for any fuel leaks around the new filter. If there are no leaks, you're done!
This process should help get your Astro Safari running smoothly again with a fresh fuel filter.
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Frequently asked questions
To remove the fuel filter from your Astro Safari, you should first spray PB Blaster on the fittings. Then, remove the fuel pump relay and run the engine until it stalls. Finally, remove the old filter.
You will need a metal chisel, a hammer, a fuel line (flare nut) wrench, and shop rags to soak up any leaking gas.
The size of the wrench you need depends on the year and model of your Astro Safari. For a 2000 Astro, a 16mm or 5/8" flare wrench for the line nut and a 13/16" combination wrench to hold the filter nut in place should work. For a 1995 Safari, a 20mm flare nut wrench is recommended.
