Checking a Ford VV carburettor
The Ford Variable Venturi carburettor is fitted to many small Fords.It looks like an ordinary fixed-jet carburettor, and has some features typical of that type, such as an accelerator pump. However, its main mechanism is of the constant-depression type – like an SU, but tilted through 90 degrees.auto auto oil seals SOLD IN THE COUNTRY.
The richness of the mixture for cold starting is set by Ford for the average climate.In exceptionally cold conditions, you can adjust the choke by loosening the three screws which hold its outer casing, and turning the casing until its index mark is opposite the left-hand mark on the carburettor body.mechanical oil seals. Tighten the screws. In warm conditions, turn to the right-hand mark.
Like any carburettor, it can become choked with dirt and sediment, and should be cleaned and checked about once a year.
There are quite a few small, delicate parts, so prepare for this job as you would for a fixed-jet carburettor (See Checking and cleaning a fixed-jet carburettor).auto oil seals. Take out the screws securing the top of the body and lift the top off. It is a plain lid with no parts attached to it.From the inside, push out the plastic blanking disc opposite the end of the needle. (remember to refit the disk when reassembling.)Unscrew the needle through the blanking-disc hole, counting the number of turns it takes you until you can pull the needle out.
Pull the needle straight out, taking care not to bend it. Check the needle and renew it if it is worn – however slight the wear.auto auto oil seals SOLD IN THE COUNTRY.
Unscrew and remove the top.valve oil seals.Unscrew the needle through the hole, counting turns.Push out the blanking disc with a screwdriver.Ensure that the metering-rod spring is fitted, and is central and vertical.auto oil seals.Pull out the needle, do not bend it.
Buy replacements for all the gaskets. You may also need to replace the main needle and jet and the float needle valve if they are worn, and the two diaphragms if they are damaged.
Remove the carburettor from the car for cleaning (See Removing a carburettor for cleaning), keeping it upright to avoid spilling fuel. Clean the outside before you dismantle it, to keep dirt out of the inside. Wash the parts in petrol and wipe them clean with a lint-free rag. Do not wash diaphragms – keep in a clean, dry place.auto auto oil seals SOLD IN THE COUNTRY.
The Ford Variable Venturi carburettor is fitted to many small Fords.It looks like an ordinary fixed-jet carburettor, and has some features typical of that type, such as an accelerator pump. However, its main mechanism is of the constant-depression type – like an SU, but tilted through 90 degrees.auto auto oil seals SOLD IN THE COUNTRY.
The richness of the mixture for cold starting is set by Ford for the average climate.In exceptionally cold conditions, you can adjust the choke by loosening the three screws which hold its outer casing, and turning the casing until its index mark is opposite the left-hand mark on the carburettor body.mechanical oil seals. Tighten the screws. In warm conditions, turn to the right-hand mark.
Like any carburettor, it can become choked with dirt and sediment, and should be cleaned and checked about once a year.
There are quite a few small, delicate parts, so prepare for this job as you would for a fixed-jet carburettor (See Checking and cleaning a fixed-jet carburettor).auto oil seals. Take out the screws securing the top of the body and lift the top off. It is a plain lid with no parts attached to it.From the inside, push out the plastic blanking disc opposite the end of the needle. (remember to refit the disk when reassembling.)Unscrew the needle through the blanking-disc hole, counting the number of turns it takes you until you can pull the needle out.
Pull the needle straight out, taking care not to bend it. Check the needle and renew it if it is worn – however slight the wear.auto auto oil seals SOLD IN THE COUNTRY.
Unscrew and remove the top.valve oil seals.Unscrew the needle through the hole, counting turns.Push out the blanking disc with a screwdriver.Ensure that the metering-rod spring is fitted, and is central and vertical.auto oil seals.Pull out the needle, do not bend it.
Buy replacements for all the gaskets. You may also need to replace the main needle and jet and the float needle valve if they are worn, and the two diaphragms if they are damaged.
Remove the carburettor from the car for cleaning (See Removing a carburettor for cleaning), keeping it upright to avoid spilling fuel. Clean the outside before you dismantle it, to keep dirt out of the inside. Wash the parts in petrol and wipe them clean with a lint-free rag. Do not wash diaphragms – keep in a clean, dry place.auto auto oil seals SOLD IN THE COUNTRY.
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