Whining noise coming from engine.

ANSWER : There should be no appreciable run-out on the crank pulley and if a physical inspection of the harmonic balancer reveals damage such as a broken, cracked or separated rubber bond, the balancer should be replaced. If you do have a failed balancer, don’t operate the engine because the imbalance and/or torsional forces on the crankshaft can cause damage to the crankshaft and main bearings. You can obtain an inspection/repair quote, and schedule the repair as you like, by simply visiting YourMechanic’s harmonic balancer repair service page and click on "Get a Quote". If you request this service, the responding certified mechanic will first inspect what you have and, if indicated, implement the required repairs and answer any questions that you might have. With regard to the ticking noise, that is almost undoubtedly valve train noise. A certain, minimal level of noise can occur on particular makes and models. Whoever performs the balancer inspection and repair, if required can evaluate that noise up close and let you know if it is normal or not. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

ANSWER : Hi there. It appears you have more than one problem with your vehicle. The noise coming from engine area with a load on the electrical system, may be a bad diode in the alternator. Continuing to drive the vehicle with a bad alternator diode, may leave you with a dead battery. The hot air coming from the vents sounds like blend door actuator(s) problems. I recommend the concerns your vehicle has, it be inspected by a certified technician like one from YourMechanic to pinpoint the noise and help you fix it accordingly.

ANSWER : Hello there, thank you for asking about your 1992 Isuzu Pickup. A professional will have the correct equipment to read OBD1 codes. Retrieving the diagnostic trouble code(s) is the first place to start when diagnosing your vehicle. Increasing RPMs changes engine load, which can in turn affect many different sensors and components, causing the Check Engine Light to illuminate. The only way to narrow down the options and find the culprit is through in person diagnosis with an OEM compatible scan tool. A certified technician from YourMechanic can retrieve the OBD codes at your home or office.

ANSWER : Hello – your truck has a secondary air injection pump, which is powered by an electric motor. It is located under the hood, and is power up in the "Run" ignition switch position. I suspect what you are hearing is this pump spinning up. If the noise seems louder than reason would suggest, perhaps the bearings are worn out, and a replacement air pump is in your future. For further diagnosis, I recommend a noise inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

ANSWER : Hi there. Although a supercharger sound is great to hear with most Dodge performance engines, this sound on a street car is often an indicator of two different problems. First, it could be a vacuum or exhaust leak or perhaps an issue with the gear drive. In most cases, it’s an exhaust leak, especially with an engine that is nearly 20 years old. I would try to isolate different conditions as to when the noise gets worse in order to correctly diagnose the source of the noise. If not, it might be a good idea to have a professional mechanic come to your location to complete a car is making a noise inspection.

ANSWER : Hello, thank you for writing in. Due to having the tires replaced recently, you may have a balance issue. Tires are "balanced" in a process where they spin the wheel on a machine and make sure they turn evenly. Any issues are corrected by adding weights to certain parts of the tire. The tires may have been improperly balanced, or may not have been balanced at all. You should start there, and see if the issues is resolved. When they have the wheels off, have a technician check the brakes. Make sure the pads were properly installed and are in place. Between the two inspections and any possible corrections, the issue would go away. If the noises continue, you will want to have the wheel assemblies inspected.

ANSWER : Hi There,
I think you are on the right track in thinking of things like the alternator or the water pump as those are two things that immediately will correspond to RPM change when accelerating. If it is the alternator, try to notice if you voltage gauge fluctuates as this will indicate an alternator that is no longer maintaining a consistent charge and may be close to failing. You may also want to check for leaks around your water pump, particularly around the shaft area, as this is a common place for them to leak and will usually be the center point for the whining noise. This will also of course be accompanied by a change in engine temperature as well if there is coolant leaking. If you need any further help with this, please reach out to us here at YourMechanic as we are always hereto help.

ANSWER : Hi there. A binding accessory could be causing your concern. Simply remove the drive belt and recheck. If the problem goes away, this eliminates the fear that there could be something goin on with the engine or transmission internally. It sounds like this could be the water pump. If the water pump is binding or leaking, it can cause the belt to slip and make it seem like the engine gets bogged down. Usually a visual inspection quickly uncovers the leak. However a properly executed pressure test is the best way to uncover leaks, both current and potential. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car is making a noise inspection.