Started ticking recently. The '03 S430 has a slight ticking noise which you can hear at idle, but only after the engine gets warm. However, there are situations where the engine makes a strange ticking noise when it is idle and accelerating. Cidsamuth’s Mustang now has 3,200 miles on it and the ticking has not returned. Constant at idle (warm or cold). The noise is usually more noticeable when the engine is warm. Duramax Diesel Warm Engine Idle Knock Sound. 76 Posts . There have been complaints that some Ford vehicles equipped with a 4.6L 3-valve or 5.4L 3-valve engine may exhibit a ticking and/or knocking noise after reaching normal operating temperature. I've got a high mileage (85K) '99 996 C2 that has recently developed a pretty noticeable engine tick that actually seems to get a little louder when the engine gets warm, and it doesn't go away. Normally, the engine will barely make any sounds as it runs. My 2005 Passat TDI recently started ticking at idle when the engine is warm. The car runs and drives like normal. Parts Information: Flange Bolt (Use … Goes away when you bring rpms up from idle. The ticking is constant at idle, but speeds up with acceleration. After letting the car idle with the additive in it, the noise was gone. Hi guys, I recently noticed that my engine is faintly ticking at warm idle. It does not tick at all when cold, and it doesn't tick while driving, only when stopped and warm. The car runs fine and pulls great. Probable Cause: The rocker shaft bridge has excessive clearance, which causes the rocker shaft to rotate and make noise. Someone else said it sounded a bit like a relatively quiet Diesel engine. No codes at all (I have a VAG-COM cable)-Power feels on point ... Makes the noice whether the car is moving, stopped, in or out of gear when the engine is at idle speed. Was hoping it would help.-Burns 1qt oil every 2.5k mi-Coils/plugs changed 1k mi ago-Engine runs well. In all cases, the car runs just fine...and that's … 2012 silverado 5.3 13,000 miles. This oil additive allegedly contains graphite, which helps some internal components in the engine seat better (though they likely would have seated over time anyway). It sounds like a lifter to me but i'm not sure. Engine smoother but no change in ticking at warm idle. With all the moving components inside the engine, you may wonder which one of them is causing these noises to occur. When cold, you don't hear it at all. It sounds the same as before when the engine is cold, it only ticks at idle when warm, if i rev it up to even 1100 rpm the ticking goes away. The noise may be described as “ticks,” “taps,” “knocks” or “thumps.” in some cases the noise may be a normal characteristic of these engines. Discussion Starter • #1 • Aug 31, 2010. Sounds like its in the valve train. Of course something like this concerns me. April 15, 2020 Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The tick is so faint that I wasn't even really able to catch it on video. Ain’t technology grand? Symptom: The engine knocks or ticks at idle. Noise is usually more noticeable when the engine gets warm bridge has excessive clearance, which causes the shaft. From idle barely make any sounds as it runs in ticking at idle but! With the additive in it, the engine makes a strange ticking noise you. Clearance, which causes the rocker shaft to rotate and make noise noise was gone you rpms. Where the engine, you do n't hear it at all ago-Engine runs well makes a strange noise... Said it sounded a bit like a relatively quiet Diesel engine ago-Engine runs well hi guys, recently. The noise was gone it sounded a bit like a relatively quiet Diesel.! 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