Use a piece of brake line that fits in the hole with a bit of epoxy on that. It will both seal and reinforce the broken piece. Or just go the old school route and just send it, though this radiator doesnt have the upper tank volume with that in mind.

That is either from a large pothole or a curb. That is a slice not a blowout.

Is there a crack near the sensor? I see this fairly often on GMs ecotec and the sensor is usually melted. A small crack could throw off the readings just enough to kill the sensor in the long run.

I warm my truck up for about 10 minutes but it’s an old carbed beast and wants nothing to do with moving until there’s some heat in the motor. I let my car warm up for 5-10 minutes but that’s so I can see. If I can see I wait until my AFR stabilizes(30-60 seconds), then I take off. If you can’t guess my car is heavily modded.

I always wanted a Lotus Exige S. Technically it was sold in U.S. but as a track only car that could not be registered for the street.