Oil deflector

Hello.

Im renovating my cylinder head. I have bought a upper gasket set, witch includes new oil deflectors. My engine is a 75 AMC 232.

The question is, should the oil deflectors go all the way down (like the old brown ones) or should they be on top like the new ones. (see pictures)

I thought that i had to hammer them down, to prevent oil from going into cylinder, but if i use the old ones, or the new ones, they will follow the valve going up and down, and then oil will come into the cylinder, right? Im confused..

 

pretty sure they will find the spot they want to be push em all the way on they will shift some after running a while...

 

push them all the way.. where? The old ones go all the way down, the new ones do not...

 

I have not encountered a problem with the seals not fitting. Again, installation of these seals is something that is typically handled by the shop that rebuilds the head(s).

The usual name for these in the USA is "valve stem seals."


This type with the teflon insert is called a "Perfect Circle" seal, since they were the company that first offered them. They install just like the hard plastic OEM seals that came on the cylinder head. These are very inexpensive, about $1 each. Both the OEM and Perfect Circle types are available, with the OEM type being a few cents cheaper.

If the seals that you got with the gasket set do not fit over the valve guide, then they are the wrong part. I'm sure it is not becasue of a difference between 232 and 258, since both these engines use the same cylinder head. Every source I looked at said the 232 and 258 part are the same.

Are there any instructions for valve stem seal installation? Maybe you got the wrong part in the gasket set. If it were me, I'd get a set of Sealed Power ST2004BC and try those.

 

I think you will find that the Perfect Circle seals require valve guide machining in order to be installed.
The listing at Rock Auto explains this when looking up the part number.

 

Yes excatly, the valve guide needs to be smaller for the use of perfect cicrle. Basic question: Is the stem seal supposed to cover the valve guide? And should it be sitting thight, so oil cannot slip in?

The current old brown stem seals, are covering the valve guide, but are not locking thight around the guide, but thight around the valve - witch means the stem seals will follow the valve going up and down. It it supposed to be that way?

A mechanic friend of mine, told me that its not supposed to be that way (on new cars)

What the hell do i do?

 

Yes the factory type are really more like umbrellas than seals. They do find their own position on the valve stem.They more or less reduce the oil that would flow down the valve stem.
The Perfect Circle seals need to have the valve guide machined down so the seal will slide down onto the guide, where the snap ring that is visible around the black rubber part, will secure it in position.
I have seen this tool available for use. It has a shaft that goes into the guide and cutters that cut the diameter of the guide down to the required diameter for the seal. It can be run with a drill, the problem being that you have to make sure the metal chips do not enter the engine. I would say it should be done with the head removed.

 

RockAuto shows the umbrella seals too. Felpro SS70530

 

Yup, i have searched all of europe for that part, with no luck. I think i have to buy it in the US again.. damn high freight :-(

So i will go with the oem replacement, instead of having my head machined. Thanks as always, for great help. I will soon post pictures of entire renovation, when i am done.