[Avulon]

Originally Posted by 75driver

Just to conclude the thread, I monitored the temperature via obd for the last 2 weeks, on several 100 mile journeys.
Conclusion: the motoquip stat was unreliable, sometimes opening at 87, sometimes at 93, sometimes at 97. The rate of temperature increase also varied inconsistently, which, tbh, just made me think the stat wasn’t operating correctly.

Installed a (first line) 88 deg stat (from DMGRS) today, and normality is restored.
New stat opens at 88/89, dropping to 84, and does it consistently, which is more reassuring.

Old stat is free to anyone who wants to try it out, but for clarity, it is not the “in hose” stat, but one that sits within a housing manufactured by specialist components.


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IIRC there was mention many years ago about whether or not a top hose stat (whether in housing or just top pipe) needed a small bypass / bleed hole or not. With no bleed hole and if it's further along the pipe then there's no flow at all to help carry the heat to the stat bulb. The closer the stat is to the block the less of an issue this might be. (just my tuppence).