When I sold my D2a it had done 250K. The new owner had the gasket replaced because wanted to be sure the gasket didn't give trouble on his outback trips especially as I had informed him that it was a motor that still had plastic dowels but could take LR steel dowels. Whilst there was no sign of any problem, he told me that there was evidence of the head starting to walk, with the plastic dowels already distorted. He was very pleased that he decided to have the gasket replaced even though there was no outward sign because no damage had been done.
Does that help?
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
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