Timing plate crack

Hello, I am Danny.

I tried looking up a picture to attach for you but you did not list your vehicle's engine size. This picture I attached was based on a 1.6L engine. The Corolla was also available with a 1.8L engine. Hope this helps and please feel free to ask any further questions. I can look into this further also if you get back to me with your car's engine size. Thanks for using 2CarPros.
Danny-

Could you please take a picture of the parts in question and possible state the engine size? I do not show either listed engine on a US Corolla as having a spring style tension-er. Perhaps actually seeing it would help. Thank you.

Hello again.

In my prior post I attached the correct picture as it is for your vehicle the 1.6 L. It shows the locations of where all the components attach including the Idler Pulley with Tension Spring. Hope this helps and thanks again for using 2CarPros.
Danny-

Okay, looking at the pictures you posted that piece that broke looks like it is the top flange on the oil pump. The timing tension-er mounts to a pivot and bolts onto the pump. It looks like possibly the tension-er seized and it snapped the pump piece off.

The good news is that it is not an interference engine so there should be no valve damage. I would make sure the cams both rotate okay (could be one locked up and shock loaded the belt and snapped the pump ear) If they are good and the crank rotates free a replacement oil pump, timing set and water pump should put it back on the road.
The bad news is that changing the oil pump is not a lot of fun. The car needs to be jacked up or put on a lift so you can get under it. Drain the oil, remove the front bolts from the exhaust pipe then remove the stiffener plate between the engine and transmission. Next remove the bolts from the oil pan and remove it. Now you can loosen the bolts that hold the pump in place. Hold the crank pulley in place and remove the bolt, then remove the balancer and then the crank sprocket. Remove the pump. Clean all the surfaces and use a new gasket to install the new pump. Reverse the entire process to put it back together. It is a good time to clean out the pan. Put the bottom end back together. Then you can do the timing belt from the top side and not have the bottom open longer than needed.

For that you need a way to support the engine as you need to remove the engine mount for clearance. Then you install the new water pump (easier to do it now with the timing belt off). Then set the timing marks and install the new belt.

I have seen the tension-er fail but do not remember seeing one that broke the pump that way. No other damage? It takes a good amount of force to break that casting.
Looks like you are well on the way with the repair.

Yes, just the pump, timing set and water pump. Make sure you clean the pan and pump strainer good.