Pro Chain Kit transforms PureTech wet belt engines to chain
Have you ever heard the noise of a timing belt deciding to fail when you least expect it? PureTech engines with wet belts are notorious for this, and not exactly because they are reliable. Stellantis tried to fix it, but their response has left many drivers with a very present problem.
But here comes the best part: a specialist has created a kit that makes possible a conversion that many could only imagine. A timing chain to replace the wet belt in these problematic engines. And no, it’s not a dream.
Pro Chain, the kit that changes the game for PureTech engines
It’s not common for someone to do what the main manufacturer dares not. Pro Chain has developed a kit that allows the wet belt to be completely replaced by a timing chain, without needing to modify the engine. The installation is as simple — and using the same tools — as changing the original belt.
Components and compatibility
The kit includes the chain, guides, tensioner, and even the oil supply line to adapt the engine to the new system. It is compatible with naturally aspirated and turbocharged PureTech engines. The list of compatible engines by group code is extensive:
- EB0 / ZMZ / ZM01
- EB2 / HMZ / HM01
- EB2DT / HNZ / HN01
- EB2DTS / HNY / HN02
- EB2ADT / HNP / HN05
- EB2ADTD / HNK / HN05
- EB2ADTD / HNE / HN05
- EB2ADTS / HNS / HN05
- EB2ADTX / HNN / HN07
Installation process
Experts assure that changing the belt for the chain does not involve any additional mechanical modification. The operation is very similar to replacing the timing belt, which makes the job easier for specialized workshops and reduces vehicle downtime.
PureTech engines with wet belts, now almost indestructible
After years of complaints and a damaged reputation, Pro Chain has launched the presale of its kit, with the first deliveries expected in the second half of 2026. Although the official sale in Spain has not yet been announced, this solution could be a turning point for the thousands of affected vehicles.
An alternative that Stellantis itself does not offer
The major automaker has withdrawn engines with wet belts and begun to focus on engines with chains and other technologies such as the FireFly range, but the fleet running with the controversial wet belt remains. Pro Chain thus offers a real and accessible response for these cases.
The future of PureTech engines
The future of Stellantis’ 1.2 turbo engines seems clearly focused on replacing them with the new FireFly family, but until that happens, the conversion kit is a solution that can avoid headaches and costly repairs resulting from wet belt failure.
Comparison of the PureTech timing system
| System | Reliability | Maintenance | Estimated cost |
|---|---|---|---|
| Wet belt | Questionable | Intervention every 100,000 km | Moderate |
| Chain (Pro Chain kit) | High | Almost none | High (initial) |
Users who decide to make the change will see their PureTech engine stop being a recurring problem and become an almost indestructible machine. Isn’t that what everyone expects from a modern engine?
The reality is that the Pro Chain kit marks a before and after in the repair and maintenance of engines with wet belts. For many, it will be the difference between sticking with a car that causes them headaches and having a reliable, worry-free engine.
