Mk 1 T5 engine

Is there a retaining circlip on the fly wheel side oil seal on the Mk 1 engine?Just replaced mine and it looks like there is a retaining groove but there wasn’t one there.I only ask as i’ve been having trouble with it blowing out if I dont epoxy it in .any feedback appreciated JACKO C.N.S.C

There is a retaining clip on the clutchside but not on the flywheel side . I think im right in saying that you should check that the breather on the clutch cover is not blocked as you obviously have to much crankcase pressure . Im sure that if my advise is wrong someone will correct it .