Valve and Keeper seized together

[twilsonx]

I started disassembling my P90 today and got 8 of the 12 valves out really easy. The last 4, not so much.... something is making the valve and the keeper stick together I tried som penetating oil but it didnt seem to help. Anyone have any ideas on what I could use to get the last 4 valves off?

 

Thanks,

Travis

[Noddle]

I use a socket and hammer to remove the "collets",

 

what you do is hold the socket over the valve, make sure the socket is large enough to allow the valve stem to fit into (1/2inch or so), and give it a crack, the valve collets just pop out,

 

Note: the head must be removed from the engine, and sitting on blocks of wood to keep the valves from touching any thing under the head, ie, the bench.

 

I hope this helps

 

Nigel

[twilsonx]

I tried something kind of similar to that, but it didn't help. I'll try that when I get home tonight and see if that helps.

[BRAAP]

They most likely are not seized, just stuck. Typical from valve float causing the keepers to hammer the top of the keeper groove of the valve itself.

 

Are you using a spring compressor of sorts? With the spring compressor on on the spring, lots of pressure on the retainer, using a small hammer, tap on the retainer and it will “let go”. Sometimes it takes a healthy thwack depending on how bad they are stuck. Just be sure to hit straight down, and not sideways tot he valve. Those same valves will more than likely have a ridge at the top of the keeper groove and sometimes, that ridge is enough to prevent the valve from easily sliding out the valve guides. Before you pull the valve out of the head, slide your fingers up the valve stem and across the keeper groove. You will feel this ridge I am talking about as it catches your finger. If so, “carefully” using a fine file, gently lay the file flat along side the valve stem and "lightly" file around the keeper groove as in the bottom picture, to remove that ridge so the valve will now easily pull through the guide without scoring the guide. If you didn’t nick/mar the valve stem during the ridge removal process, and the valve stems aren't worn too much, those valves should be reusable.

 

Tapping stuck keepers;

 

Free at last;

 

Filing the ridge;

[Noddle]

Nice one Braap, much more elegant than my way..

 

Nigel

[twilsonx]

Alright, I read noodle's post during my break today, and it was the first thing I tried and it worked perfectly.

 

I can see how BRAAP's way works, but the spring compressor I have is not that style.

 

Thanks guys, Problem solved.....Now I wait till I have the money to get it machined.

[Challenger]

Not sure if this is the best way to do it but using a conventional spring compressor I fully compressed it, and then while pressing down on the spring I gently tapped on the valve upwards with a ball peen hammer that was almost the same curvature as the bottom side of the valve. Youll hear a little pop and their out.