Automotive service tools for safely removing and replacing crank bolts on compatible Mercedes-Benz engines. Confidence comes from tackling high-torque jobs without risking the pulley or surrounding components. Is the CTA Tools Crank Bolt Service Kit the right choice for garages and experienced home mechanics?
⚡ At a Glance
- • Primary Function: Breaks loose crank bolts with a counter-weighted 27mm socket and holds the vibration damper securely while servicing the crankshaft pulley
- • Best for: Mechanics and competent DIYers working on Mercedes-Benz M112, M113, M137, M275 and M285 engines
- • Not ideal for: Engines outside the listed Mercedes families or applications requiring different-sized sockets and specialised holders
Kit combines a 27mm counter-weighted crank bolt socket (CTA 1068) with a Benz crankshaft pulley holder (CTA 3998). Designed to break loose crank bolts and hold specified vibration dampers during removal and replacement.
Controlled Bolt Removal - with counter-weighted 27mm crank bolt socket
Counter-weighted CTA 1068 27mm crank bolt socket balances reaction forces during high-torque use, reducing torque feedback to the operator. The size matches common Mercedes crank bolt fittings used on the listed engines.
Safer, more controlled loosening of stubborn crank bolts, reducing the effort required and lowering the chance of slippage during removal.
Secure Pulley Holding - with CTA 3998 crankshaft pulley holder
CTA 3998 is engineered to hold vibration damper part numbers listed in the product description while the 27mm socket is used to remove or replace the crank bolt. The holder mates with specific damper geometries to prevent rotation.
Keeps the vibration damper steady during service, preventing damage to the pulley and simplifying accurate reassembly.
Broad Mercedes Compatibility - with support for multiple engine families
Compatibility covers M112, M113, M137, M275 and M285 engine families and a long list of vehicle services and models from the C‑class through to the SLK and ML lines. The combined tools address the typical crank bolt and damper arrangements used across these engines.
Useful for workshops that service a range of Mercedes models listed, reducing the need to source multiple specialised tools for each engine type.
✨ The 4 Key Reasons for CTA Tools Crank Bolt Service Kit
- 27mm counter-weighted socket - Reduces reaction forces, enabling safer, more controlled bolt removal.
- Crankshaft pulley holder - Secures vibration damper during service to prevent rotation.
- Compatibility with M112-M285 engines - Covers many Mercedes models, reducing trips to specialist suppliers.
- Combines two specialised tools - Ensures correct tools are on hand for crank bolt jobs.
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: CTA Tools
- Product ID: B09DM7JNWZ
- Compatible Engines: Mercedes-Benz M112, M113, M137, M275, M285
- Included Tools: CTA 1068 Crank Bolt Socket, CTA 3998 Crankshaft Pulley Holder
❓ Frequently Asked Questions
Q: Which Mercedes engines are compatible with this kit?
A: Compatibility includes Mercedes-Benz M112, M113, M137, M275 and M285 engine families, as stated in the product description.
Q: What tools are included in the kit?
A: Kit combines CTA 1068, a 27mm counter-weighted crank bolt socket, and CTA 3998, a Benz crankshaft pulley holder.
Q: Which vehicle models can be serviced using the kit?
A: Listed service coverage includes C240, C280, C320, C43 AMG, CL55 AMG, CLK320, CLK55 AMG, E320, E430, E500, E55 AMG, G500, ML320, ML350, ML430, ML500, ML55 AMG, S430, S500, SL500, SLK320, CLK500, C55 AMG, SLK AMG, CLS500 and R500.
🏆 Our Verdict
Suitable for mechanics and competent DIYers who work on the listed Mercedes-Benz engines and models. The combination of a counter-weighted 27mm crank bolt socket and a matching crankshaft pulley holder tailored to specific vibration damper part numbers is the kit's main advantage. Expect a time-saving, workshop-focused toolset that reduces the risk of damage during crank bolt service and delivers practical long-term value.
