I went to an Autozone store today. The "house brand" thermostats for 617 diesels used to be Wahler. It now appears it is a Moto-Rad. I didn't buy it.

Do I need to spend the $$ at the dealer for a Wahler brand. My previous 300D had the Wahler installed. No problem with Wahlers.

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84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)