1990 Jeep Comanche Engine Makes A Ticking Noise

Common Causes of Ticking Noises in Your 1990 Jeep Comanche Engine and How to Address Them

Find Repair Location
Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
12% chance it's the
Exhaust Leak
0%
88% chance it's
Something else
The most common reasons a 1990 Jeep Comanche engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak.
  • Exhaust Leak: A damaged exhaust manifold or a loose connection in the exhaust system can cause an exhaust leak, resulting in increased noise and potential loss of engine power.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 1990 Jeep Comanche engine makes a ticking noise?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the drive belt idler pulley fails, there will be a very audible chirping noise from the front of the engine. This is because the idler pulley bearing is no longer smooth, and rotating causes metal to grind at high speeds. If it is not changed immediately, there is a chance it will become dislodged, or allow the drive belt to slip off. If the belt falls off, the accessory that it drives will no longer function. For instance, if the alternator belt idler pulley fails, the alternator may stop functioning. Also if the pulley begins to wobble, allowing slack in the belt, it will make an extremely loud squeaking or screeching noise, especially on cold starts. This is the belt slipping on the crankshaft pulley, and will require belt replacement once the idler pulley is replaced.

An engine leaking oil does not always make a puddle on the ground. A burning smell may be noticed from the front of the vehicle after driving. This is because engine oil leaks may fall onto hot engine components, especially the exhaust manifold, and burn off before making it to the ground. This poses a risk to the engine because the leak going unnoticed may deplete the engine oil reserve, and lead to an oil starvation issue. Some engine oil leaks only occur while the engine is running, so the leak may be larger than the small spot on the ground makes it seem.

Noises can be accompanied by many annoying or worrisome sensations. Consider the noise of grinding brakes, the noise sounds much like the brake pedal and steering wheel feel. This is important, as random noises can be difficult to replicate without knowing when the sound occurs, what must be done to make the sound, and what sound it is. Any professional technician can replicate and diagnose most noises, but to ensure the vehicle is more quickly diagnosed, make sure you tell your technician these three pieces of information.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the potential causes of a ticking noise in the engine of a 1990 Jeep Comanche, and how should I diagnose them?

When faced with a ticking noise in the engine of your 1990 Jeep Comanche, a systematic diagnostic approach is essential for identifying the root cause. Start by checking the engine oil level and quality, as low or dirty oil can lead to inadequate lubrication, resulting in ticking sounds. Next, inspect the valve train components, including lifters, push rods, and rocker arms, for any signs of wear. An exhaust leak can also produce a similar ticking noise, so examine the exhaust system for any damage or leaks. Additionally, assess the timing chain for slack or wear, as a loose chain can contribute to the noise. It's also important to rule out spark knock, which can occur if the engine is not running smoothly, and check for any issues with the fan or belts that may be causing interference. Begin your diagnosis with a visual inspection and listen closely to pinpoint the noise's source. Utilizing a mechanic's stethoscope can help isolate the sound to specific components. If these steps do not lead to a resolution, consulting a mechanic for a professional evaluation may be necessary. By following this structured approach, you can effectively diagnose and address the ticking noise in your Jeep Comanche.

What could be causing the ticking noise in the engine of a 1990 Jeep Comanche?

When diagnosing the ticking noise in the engine of a 1990 Jeep Comanche, it's essential to explore several common problems that could be contributing to the issue. One significant factor to consider is valve train problems, which may stem from worn lifters, pushrods, or rocker arms, leading to irregular sounds during engine operation. Additionally, low oil levels or pressure can exacerbate the situation, as inadequate lubrication causes engine components to rub against each other, resulting in a distinct ticking noise. An exhaust leak, particularly if it occurs near the engine, can also produce similar sounds, making it another potential source of the ticking. Furthermore, spark knock, often triggered by using low-octane fuel or incorrect ignition timing, can manifest as a ticking noise that should not be overlooked. Lastly, piston slap, which occurs when worn pistons or cylinders create a gap, can produce a noticeable ticking sound, especially when the engine is cold. To effectively address these issues, it is advisable to consult a qualified mechanic who can provide a thorough inspection and accurate diagnosis of the ticking noise in your Jeep Comanche's engine.

How urgent is it to address the ticking noise in the engine of a 1990 Jeep Comanche?

When you hear a ticking noise coming from the engine of your 1990 Jeep Comanche, it is crucial to act swiftly. This sound can be a warning sign of underlying problems that, if left unaddressed, may lead to severe engine damage or even complete failure. Common culprits behind the ticking noise include low oil levels, which can cause insufficient lubrication, or worn-out components such as valves or lifters that may need replacement. Ignoring this symptom not only risks escalating repair costs but also compromises your vehicle's performance and safety on the road. Therefore, it is advisable to conduct a thorough diagnostic check, preferably with a professional mechanic, to pinpoint the exact cause of the noise. By taking prompt action, you can safeguard your Jeep's engine health and ensure a safer driving experience.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.