Toyota 2TG Engine – Block Water Jacket Restoration
The inside of the block is pretty crusty.
I took a piece of coat hanger and used it to scrape/loosen big chunks by poking down through all the coolant ports in the deck surface. Then used the shop vac to suck out the big bits.
Made a block off plate for the water pump port on the front of the block.
Then filled the block with Metal Rescue for an overnight soak.
This stuff is a mild acid/chelating agent that attracts the iron oxide molecules away from the cast iron without being strong enough to damage the underlying cast iron. After I drain it through the block drain, I’ll fill it with some water for a rinse and then put some anti-freeze in it until I’m ready to assemble.
And here’s the front cylinder – essentially rust-free.
Drained, filled with a mix of water and antifreeze and let sit for a bit. Then put the block drain fitting back in. Ready to move on!