In the process of replacing the right-side bulkhead of my 03 rx1 I put a hole in the water pump cover. Serious Bummer, please don't ask how. It bled anti-freeze and needs to be replaced. I've been able to get the front three hex screws off, but now need to unscrew the four phillips screws coming from the engine side because it's not budging. Do I need to pull the engine to replace the water pump cover?