Fixing a Cracked EVGA Hydro Copper GPU Water Block with JB Weld

The Damaged EVGA Hydro Copper GPU

• 💡 An EVGA RTX 3080 Hydro Copper GPU belonging to a moderator has a cracked water block terminal.
• ⚠️ The crack occurred because the plastic terminal was over-tightened, causing it to split due to the tapered fittings.
• 🔍 The pressure tester confirms the block does not hold air, with air escaping through the visible crack.

Disassembly and Diagnosis

• 🛠️ The process involves disassembling the water block to access the damaged terminal.
• 🧐 The speaker notes that the plastic terminal is thin, injection-molded plastic, not a more robust material like acetal.
• 🧩 The over-tightening has also caused warping in the plastic around the fittings.

The JB Weld Repair Attempt

• 🩹 The plan is to use JB Weld ClearWeld to repair the crack in the plastic terminal.
• 🎯 This method was previously used successfully on a Corsair block to seal a gap.
• ⚠️ A concern is that the JB Weld might permanently seal the fittings, limiting future options.

Repair and Reassembly

• 🧼 The cracked area is cleaned thoroughly before applying the epoxy.
• 🔩 C-clamps are used to hold the terminal together while the JB Weld cures, ensuring the crack is fully closed.
• ✨ The RGB strip is removed to allow better access for the repair.

Testing and Conclusion

• ✅ After curing, the block is reassembled and tested with the pressure tester.
• 📈 The block successfully holds air, indicating the JB Weld repair was effective.
• ⚠️ The user is advised not to remove the fittings again, as the seal may not be repeatable.
• 🏆 The GPU is restored to working condition, saving it from being unusable.