TPC Automotive Ductile Iron Pins, Box of 100

TPC Tapered Threadless Pins offer a cold repair solution for cracked cast metal components like engine blocks and cylinder heads. Their threadless design allows for easy installation in confined spaces, bridging cracks and providing a strong, durable repair without heat. They are also used to prevent spun bearings in diesel and high-performance engines.

TPC Tapered Threadless Pins are specifically designed for the cold repair of cracks in cast metal components, making them ideal for situations where welding or high-heat processes are undesirable or impossible. Common applications include repairing cracks in cast iron engine blocks, cylinder heads, and other castings. These pins offer a versatile solution for casting repairs, even in the most confined and hard-to-reach locations.

Installation is simple: the tapered threadless pins are inserted into a drilled hole that intersects the crack, effectively bridging the damaged area and preventing further propagation. This cold repair method eliminates the risks of warping, stress, or distortion often associated with high-heat repairs, ensuring a strong and durable fix without compromising the integrity of the casting.

Beyond crack repair, TPC Tapered Threadless Pins are also valuable in high-performance and diesel engine applications for preventing spun bearings. By providing additional alignment and stability to the main bearing shell on the crankshaft journal, these pins prevent the bearing from rotating freely within its housing, minimizing the risk of catastrophic engine damage.

TPC are 15/16 inches long with a small end diameter of 0.125 inch.

See our Plug Specification Chart for other available sizes (linked above).