1977 Dodge Van SQUEALS at High RPM

[Dirtymech]

Hello all. I'm working on a 1977 Dodge van, V8 (the 360 cu. in. model I believe), with automatic transmission. Right now the engine is experiencing a problem. Parked or in neutral, the vehicle idles just fine. But when you rev the engine up, a horrendous squeal emerges from some part of the engine.

My first thought was the drive belts, but they all seem to be nice and tight, and in good condition. I suspect the timing belt may be old and causing the noise, or something that is being driven by the crankshaft. Can anyone provide advice as to what I should check to find the problem?

Isaac

[Racincc85]

It has to be one of the accessory drive belts. Even though they seem tight they can still slip and squeal when the engine is revved if they are worn enough. Since belts are so cheap I would replace them and see if that fixes it. These engine's don't have a timing belt as they are overhead valve not overhead cam. Timing belts are only used on overhead cam engines.

[Dirtymech]

Oops I meant timing chain, not belt. I get those mixed up quite a bit. Thanks for the advice on the squealing sound. I'll recommend it to my client when she has her tune-up done.