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Post by paddski on Jun 5, 2023 11:20:56 GMT
When my tank is 3/4 to full and I drtive it. I get a very strong smell of petrol and when checking the rear panel where the petrol cap is, there is fuel everywhere, so guess I need a new petrol cap/seal?
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Post by enigmas on Jun 5, 2023 11:40:52 GMT
Look in the boot area where the tank filler tube connects to the filler. You'll see a hose about 3/4" in diameter that runs down through the side of the boot floor. If it's torn or perforated it will allow petrol fumes to enter the i terior of the car.
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Post by paddski on Jun 5, 2023 15:06:44 GMT
Look in the boot area where the tank filler tube connects to the filler. You'll see a hose about 3/4" in diameter that runs down through the side of the boot floor. If it's torn or perforated it will allow petrol fumes to enter the i terior of the car. Noted, thanks I will check this |
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Post by paddski on Jun 5, 2023 15:39:24 GMT
Look in the boot area where the tank filler tube connects to the filler. You'll see a hose about 3/4" in diameter that runs down through the side of the boot floor. If it's torn or perforated it will allow petrol fumes to enter the i terior of the car. I do think I need a new seal though on the petrol cap as you can see on the paintwork where the fuel has been running |
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Post by enigmas on Jun 5, 2023 23:13:41 GMT
Who fills the fuel tank to the very brim of the fuel filler paddski?
There is a whole discussion on fuel purging during the filling process of a P5. The problem lies within the factory design. Due to the physics of displacement, air must exit for fuel to take its place in a petrol tank. This process occurs within the filler neck of a P5; there is an inner and outer tube within the neck. Petrol issuing out over the body in the vicinity of the filler cap is due to purging. Fill the tank slowly and don't overfill it to the level of the cap is probably the easiest solution to counter fuel purging.
Sealing the tank cap so that no air can enter will result in a vacuum lock...the engine will then cutout. Consider the physics of the system function before before making alterations.
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Post by lagain on Jun 6, 2023 15:51:38 GMT
One of our local members had a similar problem and when he looked under the rear seat there was petrol that had leaked out of the tank, due to rust perforations. Hopefully not but worth a look
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Post by paddski on Jun 6, 2023 16:05:09 GMT
One of our local members had a similar problem and when he looked under the rear seat there was petrol that had leaked out of the tank, due to rust perforations. Hopefully not but worth a look Yes def worth a look thanks. |
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Post by paddski on Jun 6, 2023 16:08:49 GMT
Who fills the fuel tank to the very brim of the fuel filler paddski? There is a whole discussion on fuel purging during the filling process of a P5. The problem lies within the factory design. Due to the physics of displacement, air must exit for fuel to take its place in a petrol tank. This process occurs within the filler neck of a P5; there is an inner and outer tube within the neck. Petrol issuing out over the body in the vicinity of the filler cap is due to purging. Fill the tank slowly and don't overfill it to the level of the cap is probably the easiest solution to counter fuel purging. Sealing the tank cap so that no air can enter will result in a vacuum lock...the engine will then cutout. Consider the physics of the system function before before making alterations. I dont fill it to the very brim. I will look for this discussion you mention. Presume its on here? Also the fuel doesn't come out when I fill the tank, its when the car is being driven. I have already learnt in my short ownership to fill the tank slowly and not to fill it max. I believe the fuel is getting out, only when the tank is nearly full because of the rubber gasket on the petrol cap. I will check these other potential issues though. |
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percy
Rover Rookie
Posts: 72
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Post by percy on Jun 6, 2023 21:51:49 GMT
Who fills the fuel tank to the very brim of the fuel filler paddski? There is a whole discussion on fuel purging during the filling process of a P5. The problem lies within the factory design. Due to the physics of displacement, air must exit for fuel to take its place in a petrol tank. This process occurs within the filler neck of a P5; there is an inner and outer tube within the neck. Petrol issuing out over the body in the vicinity of the filler cap is due to purging. Fill the tank slowly and don't overfill it to the level of the cap is probably the easiest solution to counter fuel purging. Sealing the tank cap so that no air can enter will result in a vacuum lock...the engine will then cutout. Consider the physics of the system function before before making alterations. I dont fill it to the very brim. I will look for this discussion you mention. Presume its on here? Also the fuel doesn't come out when I fill the tank, its when the car is being driven. I have already learnt in my short ownership to fill the tank slowly and not to fill it max. I believe the fuel is getting out, only when the tank is nearly full because of the rubber gasket on the petrol cap. I will check these other potential issues though. |
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percy
Rover Rookie
Posts: 72
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Post by percy on Jun 6, 2023 21:54:10 GMT
The tank does have a small bore open breather pipe which exits under the car so that probably helps vent the tank when filling.
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Post by lagain on Jun 8, 2023 16:02:54 GMT
I fill mine to the top and do not get any squirting out. Many years ago I glued a thin round piece of rubber to the bottom of the cap, which compresses on the existing thin rubber seal.
The tank is vented by a rubber pipe that drips out under the car.
The difficult filling is due to the angles of the pipe from the filler to the tank.
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