This is a normal sound. It is the combustion itself. In a gas engine, the combustion takes place in a certain pattern as the gases ignite in a swirl or sequence determined by the spark timing and shape of the cumbustion chamber. In a deisel, the combusion is initiated by compression and happens all at once. That may not be the most scientific explanation, but I think you get the idea. Mark A Mad Hatter #5306
--- On Wed, 3/10/10, David Savlin <[email protected]> wrote: From: David Savlin <[email protected]> Subject: Re: [IC27A] clickety clack To: [email protected] Date: Wednesday, March 10, 2010, 10:35 AM I agree with Keith. My diesel runs very well and does sound like a gasoline engine with a valve train in severe distress, but I know my motor is healthy. I've learned that a diesel running under normal load should not have any smoke in the exhaust. If you get white, blue, or black smoke in the exhaust there's a problem. The other big symptom of trouble is if you can't get the rated power out of it. Diesels are VERY sensitive to fuel system problems in this regard. Even the tiniest clog in the filters or water in the fuel can wreak havoc. David On Wed, Mar 10, 2010 at 11:53 AM, RobAdkins <robadk...@lifetalef ilms.com> wrote: hi all, i was wondering what a healthy diesel engine sounds like. mine acts healthy but sounds as if there's an extra high pitched tap-it noise akin to the valves on an old small block 350 in need of adjustment. not knowing much about diesels, i thought i'd query the community at large. is there a way to upload a sound recording to the group's page? thanks -rob
