Valve Stem Seals

[Felix]

Sorry if I initially confused you Taz.

 

I've played with holden red motors since the bigport 3k ones, whereby I confused myself with where the o-rings went.

 

What I meant by the o-ring seals doing f@$k all, is that they only try to prevent oil running down the stem. They have no effect whatsever in stopping oil spray that gets under the retainers. Also they have no effect in preventing vacuum from sucking oil down a worn valve guide.

Edited June 7, 2007 by Felix

[madrolla68]

so like this?

 

 

I can't under stand why felix was saying the do f@$k all then!!

 

So you don't even really have to take the springs off? or just compress them? I've got them all out now anyway.

 

Ok in the early days they thought that all they had to do was stop oil running down the valve stem through the collets so they put the oring on there to stop it running down the stem and into the guide then into the engine, now the new ones are a more positive seal that seals on the stem and on the outside of the guide which gives a much better seal.

 

Now its up to you if you put the o'rings on the top or put the later model ones on the guide, BUT remeber that the old heads don't have a groove on the guide to hold the seal ona nd if they come loose they WILL pump oil down the guide as the valve goes up and down.

 

I run the oring style and haven't had any problems , the guides are in good nick on that head so it should be fine mate.

[Taz_Rx]

Sweet, thanks for all the help tonight guys. They are all done now :P so still on track to having the 5k running tomorrow! well maybe.

[madrolla68]

Sweet, thanks for all the help tonight guys. They are all done now :P so still on track to having the 5k running tomorrow! well maybe.

 

 

don't use those 5K head bolts will ya, use the early ones that are fat all the way not wasted shank like the 5K ones.

[Felix]

^^^^ :P