Valve removal

Biohazard

Biohazard

Biohazard

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Joined
29 Aug 2003
Posts
31,330
Squezed for the life of me with these valve spring compressor, must try again when I get up in the morning.

Is there a magic way to get these blighters out? :confused:

Really need the head all cleaned up this weekend. :(
 
put a socket over the cap and give it a light tap, then compress.

make sure you eave yourself some free time to chase colletts around the floor.
 
Use a socket slightly smaller than the top cover above the valve spring and an extension bar, place the socket on the cover, give it a slight whack with a hammer and it should pop the collets out. Its quite easy to lose them so be careful, not everyone recommends that method but ive never had any problems.

edit: damn, beat to it
 
Cheers for that guys, will try that when I am up and organised.

My arms ain't as strong as they used to be, or those valve clamps are pants.
 
Ok all 16 valves out now. Squish area has been cleaned and worked a little, same with inlet runners just removed casting marks. Leaving the exhaust runners alone.

Whats the best way to decarbonise the valves? I don't want to jump in heavy handed and score the stems. Was thinking drill in bench lock valve in and use some 1200?

Any suggestion greatfully recieved. :)
 
Ive always bead blasted my valves, but the drill method seems to be quite popular for people. I wouldnt be scared of using some coarser stuff to start with though. Valves are really hard! Especially if there are really heavy deposites on the curved section up to the stem, i'd maybe consider using a brass brush or something. Just don't go crazy on the lapping face :)
 
When I was an apprentice we would use a wire wheel to clean the valves, never caused the valves any problems but a skinless set of knuckles was often seen :mad: Another method would be to sand blast them but not every home has a sand blaster :D

When using a socket or piece of pipe to dislodge the collets, plug the hole on top of the socket and drape a rag over it to avoid having to search for your collets. A couple of light taps on the valve stem will make sure the collets come out easy before you use a socket or compressor.
 
Blunt chisel works well. A sharp one will scratch the valve but a blunt one just scrapes the carbon off.
 
Cheers guys. Got 5 cleaned up! :rolleyes: :D

One inlet valve had to be carefully knocked out of the head with a hammer it wouldn't budge by hand.. clearly something amiss with the stem or valve seat. Off to engineers with it I suppose as I can't put it back together like that. :(

:)
 
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