Howlsatthemoon wrote: ↑Mon Jan 13, 2025 5:57 pm
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We don’t need to modify the thermostat housing itself; it has the same size and shape. Both cars have the same engine, and the bolts are in the same position. We just need to adapt the hoses.
It’s not an impossible task; someone has already managed to do it.
3 weeks later and it still isn't fitted

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It’s not a documented procedure; it’s logical for Ersin to proceed with caution.
He needs to adjust the pipes and take all the time he needs. If he doesn’t succeed, never mind; at least he tried! You’re not being helpful with this comment.
Why change the thermostat every 4 years? If it was a batch of defective parts, simply installing a new one should suffice to be reasonably safe. There isn’t much information around regarding failures with the new model. We know that it was produced by another company. I would install the new thermostat and add a simple coolant level sensor to potentially limit any damage.
Attempting to adapt the Mercedes thermostat housing is not a waste of time; the engines are the same, but the thermostat housing has been significantly reinforced at potential failure points, indicating that Mercedes aimed to strengthen both the internal and external aspects of a part prone to breaking. This modification has been successfully performed before, but it hasn’t been documented for quick replication. One needs to find the appropriate fittings and hoses; once that’s done, it won’t be much more complicated than installing the Renault/Nissan thermostat. When cross-sectioned, the two thermostats are interchangeable.