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Enginetech Engine Expansion Plug Kits

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Enginetech offers engine expansion plug kits for a variety of car, truck, SUV, high performance, and marine applications. Machined from brass or steel, the kits inc

Enginetech offers engine expansion plug kits for a variety of car, truck, SUV, high performance, and marine applications. Machined from brass or steel, the kits include a variety of sizes to seal whatever ports need to be closed off. The plugs are produced in accordance with factory specs to ensure proper fit and performance. They meet or exceed OE quality standards. Order the kit recommended for your engine.

Expansion plugs (or freeze plugs) serve two primary purposes: to block coolant leaks from internal passages, and to protect the engine block from cracking if the coolant inside freezes and expands. The plugs

Showing In Stock Items. Show All 56 Items.

Results 1 - 25 of 52

Enginetech Engine Expansion Plug Kits PK1B

Engine Expansion Plug Kit 55-02 BUI/CAD/CHV/GM/GMC/OLD/PON 3.3L/3.8L/4.3L/4.4L/4.6L/4.9L/5.0L/5.3L/5.7L

Part Number: EGN-PK1B

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Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK26B

Engine Expansion Plug Kit 68-97 FRD/LIN/MER 3.9L/4.6L/4.9L/6.1L/7.0L/7.5L

Part Number: EGN-PK26B

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK51B

Engine Expansion Plug Kit 86-08 FRD/MAZ/MER 3.0L

Part Number: EGN-PK51B

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK3B

Engine Expansion Plug Kit 65-90 BUI/CHV/GM/GMC/OLD/PON 4.3L/4.4L/4.6L/4.9L/5.0L/5.7L/6.0L/6.5L/6.6L/7.0L/7.4L/L

Part Number: EGN-PK3B

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Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK1

Engine Expansion Plug Kit 55-02 BUI/CAD/CHV/GMC/OLD/PON 3.3L/3.8L/4.3L/4.4L/4.6L/4.9L/5.0L/5.3L/5.7L

Part Number: EGN-PK1

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Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK9B

Engine Expansion Plug Kit 62-01 FRD/LIN/MER 3.3L/3.6L/3.9L/4.2L/4.3L/4.6L/4.7L/4.9L/5.0L/5.8L

Part Number: EGN-PK9B

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK8B

Engine Expansion Plug Kit 65-96 FRD 3.9L/4.9L

Part Number: EGN-PK8B

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK25B

Engine Expansion Plug Kit 64-90 BUI/CAD/CHV/GM/GMC/OLD/PON 4.3L/4.4L/4.6L/4.9L/5.0L/5.4L/5.7L/6.6L/7.0L/7.5L

Part Number: EGN-PK25B

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK14B

Engine Expansion Plug Kit 55-03 CHR/DOD/JEP/PLY 3.7L/4.5L/4.9L/5.2L/5.6L/5.9L

Part Number: EGN-PK14B

Not Yet Reviewed

Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK18B

Engine Expansion Plug Kit 66-91 AMC/JEP 4.7L/5.0L/5.6L/5.9L/6.4L/6.6L

Part Number: EGN-PK18B

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Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK185

Engine Expansion Plug Kit 85-09 CHV/GMC/IZU/OLD/PON 4.3L

Part Number: EGN-PK185

Not Yet Reviewed

Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK19B

Engine Expansion Plug Kit 75-95 BUI/CAD/CHV/GMC/OLD/PON 3.0L/3.2L/3.8L/4.1L

Part Number: EGN-PK19B

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK915

Engine Expansion Plug Kit 80-04 NIS 2.0L/2.2L/2.4L

Part Number: EGN-PK915

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Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK229AB

Engine Expansion Plug Kit 80-03 FRD/International 6.8L/6.9L/7.3L

Part Number: EGN-PK229AB

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK59

Engine Expansion Plug Kit 82-04 AM General/CHV/GMC/Hummer 6.2L/6.5L

Part Number: EGN-PK59

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK48

Engine Expansion Plug Kit 80-95 BUI/CAD/CHV/GMC/IZU/JEP/OLD/PON 2.8L/3.1L

Part Number: EGN-PK48

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK27

Engine Expansion Plug Kit 81-94 FRD/MER 1.6L/1.9L

Part Number: EGN-PK27

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK49

Engine Expansion Plug Kit 78-89 CHR/DOD/MAZ/MIT/PLY 2.6L

Part Number: EGN-PK49

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits for 1986 COMMERCIAL CHASSIS, 1987 ELDORADO - PK55

Engine Expansion Plug Kit 82-88 CAD 4.1L

Part Number: EGN-PK55

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK181B

Engine Expansion Plug Kit 83-02 AMC/DOD/EAG/JEP 2.5L

Part Number: EGN-PK181B

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits for 1987-1988 FIRENZA - PK183

Engine Expansion Plug Kit 85-89 BUI/CHV/OLD 2.0L

Part Number: EGN-PK183

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK19

Engine Expansion Plug Kit 75-95 BUI/CAD/CHV/GMC/OLD/PON 3.0L/3.2L/3.8L/4.1L

Part Number: EGN-PK19

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK911

Engine Expansion Plug Kit 79-02 DOD/HYU/MIT/PLY 1.4L/1.5L

Part Number: EGN-PK911

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK924

Engine Expansion Plug Kit 82-88 NIS 1.5L/1.6L

Part Number: EGN-PK924

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Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Enginetech Engine Expansion Plug Kits PK173

Engine Expansion Plug Kit 82-94 BUI/CHV/OLD/PON 1.8L/2.0L

Part Number: EGN-PK173

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

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