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  • Peter King27 May 2024

    AdrianR, Bucks, UK
    Same tank as you previously posted about or another one?

    Two pumps in parallel for redundancy I guess, is one of them sucking back through the other?

    1) Can you suck fuel out of the tank manually, i.e. suck cautiously on a long bit of clear pipe?
    2) What happens if you just use one pump (disconnect/cap/crimp off the other)?

    Both pumps have seperate fee...

  • Peter King27 May 2024

    The tank is out of the car and the cap is off when I did the vac test which was to determine if there was an air leak in the tank. What my question was does anyone know why there is two part numbers for fuel line AHA7383 = 1275cc and CPP7148 = 1500cc accroding to Moss the CPP1748 does both chrome bumper and 1500.
    As far as using PTFE tape an old school mechanic told me better seal threads where...

  • Charles Duffy27 May 2024

    Keep in mind that that the TD does not have self-adjusting brakes. You may need to manually adjust the engagement of the shoes on all four corners. This is a usual quarterly maintenance item.

    Cheers

  • Greybeard 27 May 2024

    Ah, now. Clearly your setup is a bit non-standard so all bets are off!
    Did the new tank come with the pickup pipe installed? It's a common occurrence that some kind of tank lining treatment is applied which blocks the strainer on the end of the pickup pipe inside the tank. I wonder if that has happened.
    Also the tank should not hold vacuum with the filler cap in place. The cap should "bre...

  • David Billington27 May 2024

    Peter,

    You shouldn't meed any thread sealant or PTFE tape to form a seal. The nut pushes on the cone on the end of the fuel pipe and pushes it against the internal pick-up pipe flare and so against the tank boss forming a seal. I found this out as the source of air in the fuel line when I used a compression fitting into the tank boss instead of the standard fitting so the internal pick-up d...

  • Peter King27 May 2024

    Hi Simon, Greybeard
    Thanks for your input. The car is a 1974 MG Midget but thats as far as it goes.The reason for me asking this question is that I have just changed the tank from the old 6 gall to 7 gall.I found that I could not draw fuel from the tank to the pumps in the boot, drawing air in from somewhere.
    The car set up is twin competition Facets in the boot to a filter king in the eng...

  • Peter Dahlquist27 May 2024

    Changed to LED lights. Low current draw and my Moss switch has been good for over 6 years.

  • Len Fanelli27 May 2024

    I installed a VW switch from NAPA more than 20 years ago, no problems!
    Len

  • Greybeard 27 May 2024

    Yep, Simon's on it.
    Different fittings on the ends.
    A series should have another short hose (tank to pump) bundled with the pump wiring, as shown in the breakout diagram.
    1500 has a short hose the other end, pump to carbs.
    You don't mention what car you have though.

    Incidentally, as I understand it the six gallon tank is generally the same as the seven gallon one, except that...

  • S Holt27 May 2024

    Hi Peter,
    Attached shows the MGOC take on the fuel system.
    Item 30 for the 1275.
    Item 76 for the 1500.
    I reckon it's more about the type of fuel pump than the size of tank.
    1275 - electric pump mounted near the tank.
    1500 - mechanical pump mounted on the engine.
    Simon

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    Body off rust free car. 1800 cc. Five main at .060 over, Burgess fast road head and cam, alternator, high torque starter, header with 2 exhaust, Hoyle coil over front suspension, High Gear Engineering 5 speed gearbox, B front spindles with Wilwood four piston calipers, 75/100 watt tripod headlamps with relays. Black with black interior. Paint is base clear with some stone chips as I drive the c...

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