05 range rover hse loud engine noise
 

Hi everyone.
I changed my 05 range rover hse water pump thermostat assy and all the hoses on Thursday ever since my engine sound like a diesel engine. I have been searching in other forum to find the issue with no luck. SomeOne Mentioned The Secondary Air Injection Cross Link Pipe Not Setting Straight In The Hole. And why I don't understand is my range has a SAI cross link pipe with the valve in the center but there is no hose connected to either of the side of the valve. I removed the valve prior to removing the pipe wondering if the valve holes were sealed but not sure the sound seems to be a leak. Has anyone experienced this b4 or can someone explain the SAI in the range rover
Thanks in advance