Carb Sketch

Vintage Werks offers a rebuilding service for early single-barrel type Solex carburetors such as used on 25hp and 36hp VW beetle and transporter engines, including 26 VFIS and 28 PCI versions, as well as some of the later automatic choke carburetors used on 40hp and 1300/1500 VW single port engines, including the Solex 28 PICT, 28 PICT-1, 28 PICT-2 and 30 PICT-1 variants. We also service single barrel Solex carburetors of other types used on a variety of European makes such as the 32PBIC versions used in Pre-A Porsche 356.

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Vintage Werks carburetor restoration involves complete disassembly of each carburetor we receive, including removal of the throttle shaft and plate, followed by a thorough cleaning of all parts. Cleaning includes a solvent wash and for metal parts, blasting with a very fine resin media that polished surfaces without unnecessary abrasion. Special care is exercised in bead blasting carburetor body elements to remove dirt, oxidation and discoloration while resurrecting the original casting finish and imperfections. Smaller hardware parts such as machine screws, clips, springs, washers and nuts, if reusable, are likewise cleaned, bead-blasted and then plated in clear zinc. Carburetor mating surfaces are carefully faced to create a flat contact that will assure secure seating between the carburetor top and base and between the base and manifold. Once bead blasted, all larger parts are washed thoroughly again in solvent to remove any residual blast media.

Following the cleaning process, the throttle body, the shaft and the plate are examined for wear, specifically side to side play. By this time, most are in need of machining to affect proper repair and this is factored into our cost.

The repair requires boring out the throttle body, either to allow fitting of an oversize throttle shaft which we have had made for this purpose (9mm nominal), or installation of bushings in the throttle body to allow use of an original size shaft (8mm nominal). Either repair in our experience is equally effective though the former retains the original design intent (see Throttle Shaft Discussion below).

The throttle shaft and butterfly are then put in the repaired throttle body and the carburetor reassembled with the plated hardware. Care is taken to assure the linkage works smoothly and the ball checks on the accelerator pump are properly functioning. The carburetor is returned to you with flange gasket and mounting hardware, ready to bolt back on the manifold of your engine.

About the Throttle Shaft:  Original design of the Solex carburetor utilized a lead-zinc alloy for the throttle body castings, the lead providing lubrication for the throttle shaft. Although very sturdy, with time shaft wear and play eventually result often leading to erratic engine running, stalling on deceleration, etc. The common repair has been to machine the throttle body for installation of bushings. While effective, depending on the choice of material used for the bushings, the self-lubricating aspect of the design may be compromised (as with brass bushings). For this reason, we often opt for the use of new over-sized throttle shafts instead as it retains the original design intent. However, availability of over-sized shafts has become increasingly problematic, so we also are able to install bushings as an alternative approach to the repair.

Vintage Werks charges a minimum labor rate of $225 for a basic carburetor rebuild, including throttle shaft repair. Any parts used or special machining to repair damage or wear, such as stripped threads, as well as nominal fees for plating services and shipping, are additional. Your carburetor is returned shipped to you with flange gasket and mounting hardware ready to install.