Click Noise When Running

Friad you will have to give more details. Clicking? From where? Loud, quiet, inside, out? ??

Tim..

Just a steady click click click that increases with the RPMs. It's fairly quiet inside the car but easily noticeable outside. Sounds like it's definitely coming from the engine compartment, possibly the passenger side.

Thanks!

Exhaust manifold leak? That usually makes a tick tick tick sound.

That is a very good point - and a disturbing possibility. Exhaust at that point is still loaded with CO. The sound of an exhaust leak around the manifold sounds amazingly like metal tapping, but an expert can probably tell the difference.

Exhaust leaks often (but not always) quiet down in the first minute or two of warm-up; that applies if the leak is from a broken stud or loose nut. They also are louder when the throttle is opened, but if it can't be heard from inside the car that doesn't help much.

Many muffler shops will inspect for leaks free of charge, in hopes of finding a customer ;-) In this case a repair should not be put off - it's a health issue.

Mike (who remembers his own hospitalization from CO poisoning)

If this is a FWD volvo, then all of the accessory drives are on that side. It could be a tensioner or belt idler bearing. These noises can be hard to figure out!

Well it's the XC, so it's AWD (it has the badging on the back, too). But I should hear from the mechanic Monday or Tuesday; hopefully he'll have a solution.

We just got it checked out...the gas cap was all that needed replacing, the seal was cracked on the inside. Only a simple $30 job. The mechanic again said that the click click noise was nothing to worry about, and I listened to my neighbor start his V70XC (he has a

So I guess it's not a concern. Thanks for the help though.