Quote:
Originally Posted by DMGRS
The usual cause I see these days is pitting / dirt in the connecting port to the engine block - if there's pitting it'll erode the new O Ring in short order, and if there's remnants of old O Ring left they'll preclude a good seal forming.
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Good point. I did ensure all pipes/ports and thermostat housing etc were clean and used my Dremel with a little polish on it it to clean around the ports (rag stuffed in before to ensure no contamination went into the engine block.
When I strip it all down again I'll have another clean and ensure there's no pitting.
Many thanks