Tecnoseal General Motors Zinc Pencil Anodes with Brass Plugs for Marine Engine Heat Exchangers

Tecnoseal General Motors Zinc Pencil Anodes with Brass Plugs for Marine Engine Heat Exchangers

Tecnoseal General Motors zinc pencil anodes with brass plugs are complete sacrificial anode assemblies designed for compatible marine engine heat exchangers and cooling-water systems. Each assembly combines a cylindrical zinc anode with a brass mounting plug, helping protect metallic cooling system components against galvanic corrosion.

The range includes four models with zinc rod diameters of 12, 16 and 19 mm and body lengths of 41, 54 and 85 mm. The brass mounting plugs feature 3/8", 1/2" or 3/4" BSPT (Gas Conico) tapered external threads, allowing the correct assembly to be selected according to the existing engine fitting.

The Tecnoseal 02000T features a 16 x 54 mm zinc rod with a 1/2" BSPT plug, while the 02001T and 02002T both have 19 mm diameter rods with lengths of 85 and 54 mm respectively. The smaller 02003T measures 12 x 41 mm and uses a 3/8" BSPT plug. Complete assembly weights range from 0.06 to 0.26 kg.

All four models are supplied complete with their brass mounting plugs. The 02000T, 02001T and 02002T versions use the 1T configuration, while the 02003T features the 2T configuration.

Key Features

• Manufacturer: Tecnoseal
• Compatible Brand: General Motors
• Product Type: Sacrificial pencil anode with brass plug
• Anode Material: Zinc
• Plug Material: Brass
• Configuration: Complete with Brass Plug
• Available Models: 02000T, 02001T, 02002T, 02003T
• Zinc Rod Diameters: 12, 16 and 19 mm
• Zinc Rod Lengths: 41, 54 and 85 mm
• External Plug Threads: 3/8", 1/2" and 3/4" BSPT
• Plug Head Dimensions: 11, 13 and 16 mm
• Pencil Types: 1T and 2T
• Weight Range: 0.06–0.26 kg

Available Models and Technical Specifications

Individual Model Specifications

Tecnoseal 02000T – General Motors Zinc Pencil Anode Ø16 x 54 mm with 1/2" BSPT Brass Plug

The Tecnoseal 02000T combines a cylindrical zinc pencil anode measuring 16 mm in diameter and 54 mm in length with a brass mounting plug. The plug features a 1/2" BSPT tapered external thread and a 13 mm head dimension. The complete assembly weighs 0.12 kg (0.26 lbs) and provides a replacement corrosion protection component for compatible General Motors marine engine cooling systems.

• Product Code: 02000T
• Anode Material: Zinc
• Plug Material: Brass
• Anode Diameter (Ø): 16 mm (0.63 in)
• Anode Length (l): 54 mm (2.13 in)
• External Plug Thread (a): 1/2" BSPT (Gas Conico)
• Plug Head Dimension (c): 13 mm (0.51 in)
• Weight: 0.12 kg (0.26 lbs)
• Pencil Type: 1T
• EAN: 8059617819965
• Supply: Complete with brass plug

Tecnoseal 02001T – General Motors Zinc Pencil Anode Ø19 x 85 mm with 3/4" BSPT Brass Plug

The Tecnoseal 02001T is the longest pencil anode assembly in this General Motors range, featuring a zinc rod measuring 19 mm in diameter and 85 mm in length. Its brass mounting plug has a 3/4" BSPT tapered external thread and a 16 mm head dimension. The complete assembly weighs 0.26 kg (0.57 lbs), providing a larger sacrificial zinc element for compatible marine engine cooling-water applications.

• Product Code: 02001T
• Anode Material: Zinc
• Plug Material: Brass
• Anode Diameter (Ø): 19 mm (0.75 in)
• Anode Length (l): 85 mm (3.35 in)
• External Plug Thread (a): 3/4" BSPT (Gas Conico)
• Plug Head Dimension (c): 16 mm (0.63 in)
• Weight: 0.26 kg (0.57 lbs)
• Pencil Type: 1T
• EAN: 8059617819972
• Supply: Complete with brass plug

Tecnoseal 02002T – General Motors Zinc Pencil Anode Ø19 x 54 mm with 3/4" BSPT Brass Plug

The Tecnoseal 02002T features a cylindrical zinc rod measuring 19 mm in diameter and 54 mm in length, supplied with a brass mounting plug featuring a 3/4" BSPT tapered external thread. The plug has a 16 mm head dimension, matching the mounting specifications of the longer 02001T model. Weighing 0.16 kg (0.35 lbs), the 02002T offers a shorter zinc element while retaining the same listed mounting thread and head dimensions.

• Product Code: 02002T
• Anode Material: Zinc
• Plug Material: Brass
• Anode Diameter (Ø): 19 mm (0.75 in)
• Anode Length (l): 54 mm (2.13 in)
• External Plug Thread (a): 3/4" BSPT (Gas Conico)
• Plug Head Dimension (c): 16 mm (0.63 in)
• Weight: 0.16 kg (0.35 lbs)
• Pencil Type: 1T
• EAN: 8059617819989
• Supply: Complete with brass plug

Tecnoseal 02003T – General Motors Zinc Pencil Anode Ø12 x 41 mm with 3/8" BSPT Brass Plug

The Tecnoseal 02003T is a compact zinc pencil anode assembly featuring a 12 mm diameter rod measuring 41 mm in length. Its brass plug is equipped with a 3/8" BSPT tapered external thread and an 11 mm head dimension. The complete assembly weighs 0.06 kg (0.13 lbs) and uses the 2T pencil configuration. Its smaller dimensions distinguish it from the longer and wider 1T models in this General Motors range.

• Product Code: 02003T
• Anode Material: Zinc
• Plug Material: Brass
• Anode Diameter (Ø): 12 mm (0.47 in)
• Anode Length (l): 41 mm (1.61 in)
• External Plug Thread (a): 3/8" BSPT (Gas Conico)
• Plug Head Dimension (c): 11 mm (0.43 in)
• Weight: 0.06 kg (0.13 lbs)
• Pencil Type: 2T
• EAN: 8052744980003
• Supply: Complete with brass plug

Application and Compatibility

• Compatible General Motors marine engine cooling systems
• Marine engine heat exchangers using replaceable pencil anodes
• Replacement of complete zinc sacrificial anode and brass plug assemblies

Model Selection

Choose the correct Tecnoseal General Motors pencil anode assembly by comparing the zinc rod diameter, rod length, external brass plug thread and head dimension with the existing installation.

The 02001T and 02002T models share a 19 mm zinc rod diameter and a 3/4" BSPT mounting connection but have different rod lengths of 85 and 54 mm. The 02000T features a smaller 16 mm diameter rod with a 1/2" BSPT connection, while the 02003T uses a 12 mm diameter rod and a 3/8" BSPT connection.

The models also differ in their pencil configurations: the first three use type 1T, while the 02003T uses type 2T. Confirm the existing assembly dimensions and thread specification before ordering.

Supply: All four models are supplied as complete assemblies consisting of a zinc sacrificial anode and a brass mounting plug.