changing valve seals/springs in situ
Turbo Mini Forums

I was flicking through machine mart book at work earlier,they have a tool in there what in conjunction with an air compresor allows you to get the valve springs off with head on

I suppose you have both valves shut and piston at bdc,fill the bore up to 90psi through the spark plug hole and way you go.

If you released the pressure I expect you could also check guide wear:cool:

Any good only cost ?10

Metro turbo weekend driver,Mini turbo in the making again!

you can use a ball of string to the same effect.

Team Racing

Never actually tried one but certainly seems a good idea, as its Jim's ball of string

I know they use the comressed air version on older fords a fair bit so i was told.

How do you use a ball of string ?
I have used comp air on a bike it worked a treat.

http://www.rabdunn.co.uk/

suppose you feed the string down the sparkplug hole and turn engine round by hand to push under valves

Metro turbo weekend driver,Mini turbo in the making again!

yep

I made a tool to do exactly this, so I could change the valve springs. Shoving rope down the sparkplug hole works a treat.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

I did it several times with the compressed air method. Made a handy tool myself to remove the collars easily.
Harry

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

I know a guy who uses nylon rope and stuffs it into the bore, then slowely turns the engine over so it come up to the bottom of the valve, then pops the spring down and collets out etc...