Hello,
I have a 2000 camry with 4 cyl engine and CA emissions. The car overheated due to broken water pump, and I replaced the cylinder head (in addition to pump and timing belt). The cylinder head was a rebuilt from a machine shop. Since the replacement the car starts and runs fine, but I got a p0420 code. I know that it means the front catalytic converter, but I don't know why it came up right after the cylinder head replacement. I am curious if the machinist may have cut the head down too much and the increased compression ratio is causing increased emissions, triggering the code. I don't want to spend the money on new converter if the problem is in the cylinder head. I also tried measuring the compression, but it is impossible to pick up a small difference in cylinder compression using a compression gauge. Also, I used a standard multy-layer steel head gasket from FelPro, if that helps you.
I have a 2000 camry with 4 cyl engine and CA emissions. The car overheated due to broken water pump, and I replaced the cylinder head (in addition to pump and timing belt). The cylinder head was a rebuilt from a machine shop. Since the replacement the car starts and runs fine, but I got a p0420 code. I know that it means the front catalytic converter, but I don't know why it came up right after the cylinder head replacement. I am curious if the machinist may have cut the head down too much and the increased compression ratio is causing increased emissions, triggering the code. I don't want to spend the money on new converter if the problem is in the cylinder head. I also tried measuring the compression, but it is impossible to pick up a small difference in cylinder compression using a compression gauge. Also, I used a standard multy-layer steel head gasket from FelPro, if that helps you.
Aug 25, 2011 at 3:14 AM