A blow moulding tool for manufacturing a thermoplastic tank for a vehicle, the blow moulding tool comprising: ▪ at least one insertion pin configured to position at least one component through an opening at a first distal end of a closed tubular parison; ▪ a mould configured to receive the closed tubular parison, wherein the mould comprises at least - a first mould portion and a second mould portion and the mould portions (108, 110) each comprise a cavity (112, 113) with at least one welding means (114, 114', 115, 115'); - a first displaceable spacer arranged on a periphery of the cavity of the first mould portion; - a second displaceable spacer arranged on a periphery of the cavity of the second mould portion; - wherein the first displaceable spacer and the second displaceable spacer configured to move into each of a first position, a second position and a third position on an axis substantially perpendicular to an extrusion direction of the closed tubular parison; - the first position corresponding to the blow moulding tool being open; - the second position corresponding to the blow moulding tool being partially-open, and the third position corresponding to the blow moulding tool being closed; - when the blow moulding tool is partially-open, the first displaceable spacer and the second displaceable spacer are configured to receive a third displaceable spacer in a region between the first displaceable spacer and the second displaceable spacer, and - wherein the third displaceable spacer comprises a first displaceable half and a second displaceable half, the third displaceable spacer being configured to surround the at least one insertion pin and to create a void space inside the closed tubular parison allowing the at least one insertion pin to move and be positioned into alignment with the at least one welding means (114, 114', 115, 115') present in each cavity (112, 113) of the first mould portion and the second mould portion. ▪ at least one insertion pin configured to position at least one component through an opening at a first distal end of a closed tubular parison; ▪ a mould configured to receive the closed tubular parison, wherein the mould comprises at least - a first mould portion and a second mould portion and the mould portions (108, 110) each comprise a cavity (112, 113) with at least one welding means (114, 114', 115, 115'); - a first displaceable spacer arranged on a periphery of the cavity of the first mould portion; - a second displaceable spacer arranged on a periphery of the cavity of the second mould portion; - wherein the first displaceable spacer and the second displaceable spacer configured to move into each of a first position, a second position and a third position on an axis substantially perpendicular to an extrusion direction of the closed tubular parison; - the first position corresponding to the blow moulding tool being open; - the second position corresponding to the blow moulding tool being partially-open, and the third position corresponding to the blow moulding tool being closed; - when the blow moulding tool is partially-open, the first displaceable spacer and the second displaceable spacer are configured to receive a third displaceable spacer in a region between the first displaceable spacer and the second displaceable spacer, and - wherein the third displaceable spacer comprises a first displaceable half and a second displaceable half, the third displaceable spacer being configured to surround the at least one insertion pin and to create a void space inside the closed tubular parison allowing the at least one insertion pin to move and be positioned into alignment with the at least one welding means (114, 114', 115, 115') present in each cavity (112, 113) of the first mould portion and the second mould portion. - a first mould portion and a second mould portion and the mould portions (108, 110) each comprise a cavity (112, 113) with at least one welding means (114, 114', 115, 115'); - a first displaceable spacer arranged on a periphery of the cavity of the first mould portion; - a second displaceable spacer arranged on a periphery of the cavity of the second mould portion; - wherein the first displaceable spacer and the second displaceable spacer configured to move into each of a first position, a second position and a third position on an axis substantially perpendicular to an extrusion direction of the closed tubular parison; - the first position corresponding to the blow moulding tool being open; - the second position corresponding to the blow moulding tool being partially-open, and the third position corresponding to the blow moulding tool being closed; - when the blow moulding tool is partially-open, the first displaceable spacer and the second displaceable spacer are configured to receive a third displaceable spacer in a region between the first displaceable spacer and the second displaceable spacer, and - wherein the third displaceable spacer comprises a first displaceable half and a second displaceable half, the third displaceable spacer being configured to surround the at least one insertion pin and to create a void space inside the closed tubular parison allowing the at least one insertion pin to move and be positioned into alignment with the at least one welding means (114, 114', 115, 115') present in each cavity (112, 113) of the first mould portion and the second mould portion.