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Injector o-ring dimensions


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Hi JimEB. For the O-Rings in the injectors, I measured the ones supplied by a well respected vendor as 4.5x1.6mm, so I would say your first size is indeed correct. An article on changing the O-rings in the TR Register comic pointed out that new rings should be Viton to resist modern fuel and suggested using an oversized c/s of 2mm. Knowing that Viton takes a set - more so than some other materials - I tried 4.5x2mm and can confirm that they j- j- j- just about fit. I used Silicone grease to prevent damage during assembly.

Cheers, Richard

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