My camshaft broke off inside the gear a month ago while driving which caused all of my valves to get bent. I had the camshaft and camshaft gear and valves replaced with a rebuilt cylinder head. Now I've noticed that my engine sounds totally different. While idling, if I rev the engine up, it sounds much deeper and slightly sputters for a short second. I pulled each spark plug wire to make sure that wasnt the problem and all was well there. I haven't noticed any problems when driving when it comes to accelerating. Just wondering what is making the engine sound so different than before. It sounds like a real cheap engine, almost like revvin up a go kart. Not to say that it sounded like a corvette prior to the work being done. Any ideas?

 

Check for exhaust leaks round the manifold and front pipe since that was all disconnected to do that job.....

 

Now that you've mentioned that, it really sounds something like that. I'll take a look at it. Is there an exact way you can tell if the exhaust is leaking?

 

Look closely at any sealing surface. If there is a leak, lots of times you will see a black soot trail around the leaking area.

 

Seafoam it and look for white smoke leaking out of the exhaust.

 

are you sure the head gasket is the correct size and the gasket is centered? timing is correct?