Piejun Posted April 17, 2019 Report Share Posted April 17, 2019 Dear all Still continuing to finish my TR4 engine rebuild. I noticed that the heater valve adapter had been replaced by an non original tube and is seized in the cylinder head. I kindly request your help and tell me what thread is used (I guess 5/8-18) as I probably have to drill the item out. Many thanks for your help Pierre Junbglut from Luxembourg Quote Link to post Share on other sites
RogerH Posted April 17, 2019 Report Share Posted April 17, 2019 Hi Pierre, welcome to the forum. I understand that it is 3/8 BSP. Roger Quote Link to post Share on other sites
Piejun Posted April 17, 2019 Author Report Share Posted April 17, 2019 Many thanks Roger. Quote Link to post Share on other sites
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