When you fire up a hearty V8, you expect to hear a throaty growl and imposing engine notes. Unfortunately, some Hemi owners report issues like a loud squealing noise while in idle or . Many owners have posted theories in automotive forums trying to diagnose the issue with suggestions like, a heat shield being loose, a noisy lifter or a belt tensioner issue.
You’ve probably already heard about the “Hemi tick,” as this issue is so widespread that a class action lawsuit was filed against the automaker. Essentially, owners report an odd rhythmic sound that repeats during operation. We recently did a deep dive into what causes the famous Hemi tick, and if it’s bad, and Fiat Chrysler Automobiles have stated that these noises aren’t out of the ordinary and don’t recommend any action. However, many owners aren’t satisfied with the manufacturer’s response, leading to several ideas of what might be to blame. Popular theories suggest the source of the tick originates with the manifold bolts, or spark plugs.
