Jeep CJ5 Starter Motor (1971-1983): A Guide to Replacement & Upgrades
Solve your CJ5's starting problems by understanding how to choose the right new aftermarket starter.
- Before replacing the starter, always check your battery and clean all electrical connections, as wiring issues are common on CJ5s and can mimic starter failure.
- For a stock CJ5, an OEM-style replacement from a brand like Crown or Omix-Ada is a reliable choice.
- Upgrading to a high-torque, gear-reduction starter from a brand like Powermaster or MSD is a worthwhile improvement for better cranking power and heat resistance.
- Replacing the starter is a feasible DIY job for most owners, typically requiring about an hour with basic tools.
Is Your CJ5 Starter Failing? Common Symptoms
A failing starter in a 1971-1983 Jeep CJ5 can leave you stranded. Because these Jeeps have simpler electrical systems, problems often show up in clear ways. Before you replace parts, it's important to know the signs of a bad starter versus other issues like a weak battery or bad wiring.
- Single Loud Click, Then Nothing: This is a classic symptom. You turn the key, hear one 'thunk' or 'click' from under the hood, but the engine doesn't crank. This often points to a bad starter solenoid or the starter motor itself.
- Rapid Clicking Noise: If you hear a fast series of clicks, like a machine gun, it's more likely a sign of a low battery or poor electrical connections. The starter is trying to engage but doesn't have enough power.
- Slow, Labored Cranking: If the engine turns over very slowly, as if the battery is dying, it could be a worn-out starter motor drawing too much power. This can also be caused by bad battery cables or a failing battery.
- Grinding Noise: A grinding or whirring sound during or after cranking can indicate that the starter gear (Bendix) is not meshing properly with the flywheel or is failing to retract. This can damage both the starter and the flywheel.
- No Sound at All: If turning the key does nothing, the problem could be the ignition switch, the starter solenoid, or a complete failure of the starter motor.
First, Check Your Connections!
Many starter problems on older Jeeps are actually wiring problems. Before buying a new starter, check that your battery terminals are clean and tight. Inspect the ground wires from the battery to the engine block and the main power cable to the starter. A loose or corroded connection can prevent the starter from getting enough power, mimicking the symptoms of a failed part.
🎬 Watch this video on common Jeep CJ starter frustrations and fixes.Choosing the Right Aftermarket Starter for Your CJ5
For a vehicle from this era, new OEM (Original Equipment Manufacturer) parts are generally unavailable. The market consists of new and remanufactured aftermarket parts. Aftermarket starters are widely available and can be a significant upgrade over the original 1970s technology.
Brand Tiers & Recommendations
The available brands for your CJ5 can be grouped into a few categories:
- OEM-Style Replacements (Good): Brands like Crown Automotive and Omix-Ada specialize in Jeep replacement parts. They are designed to be direct, OE-style replacements that fit and function like the original part. These are a solid choice for owners with stock engines who want a reliable, no-fuss installation.
- Standard Aftermarket (Better): Brands like ACDelco and MPA offer quality new and remanufactured starters that meet or exceed original specifications. These are dependable, widely available options that often come with good warranties.
- High-Torque & Performance Upgrades (Best): Brands like Powermaster and MSD offer high-torque, gear-reduction starters. These modern designs are smaller, lighter, and more powerful than the large original units. They are an excellent upgrade for Jeeps with modified, high-compression engines or for owners who want faster, more reliable cranking, especially when the engine is hot (a condition known as 'heat soak').
What is a Gear-Reduction Starter?
High-torque starters from brands like Powermaster and MSD use an internal gear system to multiply the motor's torque. This means they can spin the engine with more force while drawing less power from the battery. This technology is a significant improvement for older vehicles.
Cost of a New Aftermarket Starter (1971-1983 Jeep CJ5)
The cost to replace a starter motor can be broken down into parts and labor.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Starter | $66 - $224 |
| Shop Labor | $100 - $250 |
| Total Estimated Cost | $166 - $474 |
Cost estimates are based on a range of available parts and national labor rate averages. Prices will vary by location and specific product selection.
Frequently Asked Questions (FAQ)
Is replacing the starter on a CJ5 a DIY job?
Yes, for most home mechanics, this is a straightforward job. The starter is usually held on by two bolts and is relatively easy to access from underneath the vehicle. The process involves disconnecting the battery, removing the electrical wires from the starter, unbolting the old starter, and installing the new one. It typically takes about an hour.
What is a starter solenoid and do I need to replace it too?
The solenoid is a high-power switch that activates the starter motor. On many CJ5s, it's a separate cylindrical component mounted on the fender. On some later or upgraded starters, the solenoid is attached directly to the starter motor itself. If you have a separate solenoid and it's the part that's failing (often causing a 'click-no-start' issue), it can be replaced independently of the starter.
Do I need a high-torque starter for my stock engine?
While not strictly necessary for a stock engine, a high-torque starter is a popular upgrade. It provides faster cranking, is less prone to heat-related issues, and is often smaller and lighter, which can help with clearance around aftermarket headers or exhaust. For the relatively small price difference, many owners find it a worthwhile improvement.
Are there any recalls or technical bulletins for the CJ5 starter?
No official recalls or Technical Service Bulletins (TSBs) were found for the starter motor on 1971-1983 Jeep CJ5 models during our research. Given the age of the vehicle, most issues are related to component wear, corrosion, or wiring degradation.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5752791 J3242283
Varies by engine (4-cyl, 6-cyl, V8) and year. Most models use a 12-volt system with either a direct-drive or gear-reduction motor. Some systems use a remote fender-mounted solenoid, while others have the solenoid attached to the starter. High-torque aftermarket options often feature a 4.4:1 gear reduction ratio.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your CJ5 Starter Failing? Common Symptoms
- First, Check Your Connections!
- Choosing the Right Aftermarket Starter for Your CJ5
- Brand Tiers & Recommendations
- What is a Gear-Reduction Starter?
- Cost of a New Aftermarket Starter (1971-1983 Jeep CJ5)
- Frequently Asked Questions (FAQ)
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