Duratec - intake plenum o-rings

[boss351]

Does anyone know the correct o-ring size/spec for the single throttle body intake plenum on the duratecs? (R300/RS170). These are the o-rings that seal between the plenum and the intake ports on the head.

Adam

[David Long]

Not easy to quote this as they're oval shape!

But the seals have an inside diameter of 52 mm and an outside diameter of about 54 mm (just under 2mm thick). I think this is just an old fashioned 2 inch O ring. Hope that helps.

Edit: I should also say that they need to be Viton grade as they run too hot for nitrile.

Edited by David Long on Sunday 13th February 23:23

[boss351]

Thanks, I've got a couple of types of 2" ID Viton o-rings orderred, 1/16 and 1/8 thicknesses to see what works best.