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Ticking sound from engine?


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Today I noticed a ticking sound from the engine of our 99 2.5 Legacy GT with 60K miles on it. It is more noticeable from under the front of the car than from the top of the motor.

 

I've thought it has had an exhaust leak for a long time now but it never sounded like this. Could the lifters be making this sound with so few miles on it?

 

Just trying to get a few thoughts from you all before I take it in.

 

Thanks -------------Dave

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From one side only, or both? My fuel injectors click noticeably, but you wouldn't notice from inside the car....185K miles.

 

Try opening the bonnet, warm engine running, and open the throttle by hand and snap it shut. An exhaust leak should produce a distinct click when the throttle closes.

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It's relatively easy to determine whether the clicking is coming from the valve train or crank--just count.

 

At 700 rpm (idle), the engine is turning over at 11-12 times per second. The valve assembly will be half that rate, 5 or six times per second.

 

Simply count the clicks for two seconds. If you can't keep up, it's crank related. If you're able to keep up, it's probably cam related. My 95 has a valve lash adjuster that loves to click.

 

jim

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