On this community episode of Saturday Mechanic Ben and Russ answer Craig’s question about how to fix his coolant leak on his 2002 Chevrolet Impala.
Tune in to the new Car and Driver Channel on YouTube and follow Popular Mechanics associate auto editor Ben Wojdyla as he leads viewers, step by step, through repairs and upgrades on the Saturday Mechanic show. Got car questions? Email Ben, and he may answer them on the air.
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In this video I’ll show you how to change a car thermostat on a Jeep cherokee 4.0L I6 engine although all jeep straight six engines will be the same and many others will be similar if not the same.
Watch the Entire “Hope Floats” Build Playlist from Day 1:
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*Disclaimer – This product is meant for entertainment purposes only. Your mileage may vary. Do not try this at home. Void where prohibited. Some assembly required. For off-road use only. Slippery when wet. Batteries not included. Do not use while operating a motor vehicle, heavy equipment, cherokee, wrangler, or any jeep vehicle. May be too intense for some viewers and children under 30 years of age. Please remain seated until the ride has come to a complete stop. Studies have shown viewing these videos causes increased cancer risks in laboratory test people. I am not a professional, I have no training, I’m not even particularly good at horse whispering. Don’t believe everything that you know. Please keep your hands in the vehicle at all times. Do not tap on glass. Do not eat anything that has been on the floor for more than 3 days. Keep your hands to yourself. Not to be taken internally. Reproduction strictly prohibited. Driver does not carry cash. Objects in jeep mirrors may be farther than they appear.*
With the Kysor On/Off Fan Drives from BorgWarner, the fan continues to rotate even if the clutch stops working. In the event of air system pressure failure, the fan remains engaged which prevents the engines from overheating.
In this video, 1AAuto shows you how to replace a front engine mounted radiator fan clutch on an 80s GM Truck. This process is the same for many fan clutches that mount to the front of the water pump with 4 bolts.
1. Removing the Radiator Fan Clutch 0:59
2. Replacing the Radiator Fan Clutch 4:29
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.
Scotty Kilmer, mechanic for the last 46 years, shows how to replace a defective cooling fan clutch assembly. They do just bolt on and off, BUT there’s a few tricks to getting them off that Scotty shows which makes installation a breeze.
Things I used in this video:
1. Actron Scan Tool:
2. Fan Clutch Removal Kit:
3. Breaker Bar:
4. Pliers Set:
5. Ratchet and socket set:
6. Mechanic’s Tool Set:
7. Wrench Set:
8. Shop Towels:
9. Disposable Gloves:
10. Large Screwdriver:
12. Common Sense
13. Full HD Camera:
14. My computer for editing / uploading:
15. Video editing software:
16. Thumbnail software:
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Here’s what’s inside the fuel pump and how it works on your car.
The fuel pump, or fuel sender unit, is responsible for sending pressurized fuel to the fuel rail on the engine. It is normally situated inside the gas tank, cooled by surrounding fuel.
The fuel pump assembly consists of an electric DC motor with a paddle, a pickup screen, float, tank level sensing unit, filter, pressure regulator as well as the empty level sensor.
The DC motor drawings fuel through a turning paddle in through the housing of the motor, past the rotors and brushes out the top.
Fuel then saturates the filter, where it can then make its way up the top to the fuel line leading to the engine. Excess pressure built up in the filter is bled off through a pressure regulator valve at the bottom of the assembly, where the fuel is returned to the tank.
The tank float attaches to an arm that attaches to a metal head. The head moves in a semi circular pattern against a circuit board with printed resistors. The measured resistance values are relayed back to the instrument cluster to determine fuel amount.
The empty level sensor is a device that looks like a resistor. When submerged in fluid, it reads 2K ohms. When dry, it reads an open circuit and turns the light on the dashboard warning of low fuel in the tank.
Assembly of these components are held together by plastic pieces which are clipped together. Often these require disassembly when replacing defective pump units, as only the motor needs to be replaced.
The fuel pump in this video was removed from a 2001 Toyota Corolla.
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