Sealey Oxygen Sensor Port Thread Chaser - M12 x 1.25mm - VS527
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eBaySealey Oxygen Sensor Port Thread Chaser M12 x 1.25mm - VS527
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Sealey Oxygen Sensor Port Thread Chaser M12 x 1.25mm Thread Cleaning/RepairingFree delivery in 1–3 days£12.24Visit shop →
Sealey Oxygen Sensor Port Thread Chaser M12 x 1.25mm Thread Cleaning/RepairingFree delivery in 1–3 days£12.64Visit shop →
OnBuy.comSealey Vs527 M12 X 1.25Mm Oxygen Sensor Port Thread Chaser 5024209036450
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Sealey Vs527 M12 X 1.25Mm Oxygen Sensor Port Thread Chaser£3.50 delivery£18.00Visit shop →
Product Information
Full details
The Sealey Oxygen Sensor Port Thread Chaser (VS527) is a specialized automotive maintenance tool designed for professional mechanics and DIY enthusiasts who need to restore damaged threads within an exhaust oxygen sensor port. By ensuring that the sensor seat is clean and properly threaded, this tool prevents costly exhaust leaks and cross-threading issues during sensor replacement. While it is highly effective for its specific purpose, users should note that it is designed strictly for M12 x 1.25mm thread sizes and requires a 21mm socket for operation.
All features
| Model Part Number | VS527 |
|---|---|
| Brand | Sealey |
Extended Product Information
FAQs
Does this tool come with a socket?
No, the VS527 is designed to be used with your own 21mm socket.
Can I use this on different thread sizes?
No, this tool is specifically machined for M12 x 1.25mm threads only.
Do I need to use power tools with this?
It is highly recommended to use a manual ratchet or T-handle to maintain control and feel during the threading process.
Will this fix a completely stripped thread?
This tool is a 'chaser' intended to clean and repair minor thread damage. If the threads are completely sheared off, a thread repair insert kit may be required.
Should I use lubricant when chasing the threads?
Yes, using a high-quality penetrating oil or cutting fluid helps prevent metal galling and makes the process significantly easier.
Troubleshooting
The tool will not thread into the port.
Ensure you are using the correct M12 x 1.25mm size. If the port is severely damaged, try starting the chaser carefully by hand before applying the socket.
Excessive resistance during use.
Do not force the tool. Back it out, clean the debris from the thread chaser, apply more penetrating oil, and try again in small increments.
Pros and Cons
Pros
- Prevents cross-threading of expensive oxygen sensors
- High-durability construction built for workshop use
- Compatible with standard 21mm sockets
- Simple manual operation does not require power tools
- Compact size for easier access to exhaust manifolds
Cons
- Limited to M12 x 1.25mm thread sizes only
- Requires a separate 21mm socket which is not included
- Not intended for heavy-duty metal removal
Setup, Compatibility & Care
Setup:
- Ensure the vehicle's engine is cool to prevent burns.
- Apply a small amount of heat-resistant penetrating oil to the threads if they are heavily corroded.
- Attach a 21mm socket to the top of the VS527.
Compatibility:
- Thread Size: M12 x 1.25mm (Check your specific vehicle service manual to ensure this matches your sensor port).
Care:
- After use, clean the flutes of the thread chaser with a wire brush to remove debris.
- Wipe the tool with a light machine oil before storing it in a dry toolbox to prevent surface oxidation.