8 replies to this topic

[griff2]

hi

just a quck one ,can i change my valve springs from single to the double ones with out taking my head off???????

and if so what is the risk of this blowing my head gasket seeing i would have to undo the bolts holding my rockers on

cheers
griff2

[DaveRob]

I dont think this is possible...... you need to have access to the valve head with the spring compressor... so head off job....

Tin hat at the ready

DaveRob

[Bungle]

its easier to just whip the head off and fit a new gasket afterwards

[griff2]

cheers for your replies, i thought that my self, it was just i read in a mag that u can do it by slidding a thin screw driver down the spark plug hole to hold the valves in place while u changed each spring

cheers
griff2

[Bungle]

it is possible but very fiddly and slow

[Sprocket]

Why are you fitting double valve springs? Fitting 1.5:1 rockers?

other wise theres no point!

Easier to take the head off, youd have to do that anyway fitting high ratio rockers.

It is possible to change the springs without removing the head, but you need an overhead valve spring compressor, an air compressor and the addapters to fit into the spark plug hole.

Another way is to fill the cylinder with rope at BDC with the valves closed and turn the engine over untill it compresses the rope against the valves, again you need the overhead valve spring compressor.

Both these last methods are only suitable with the springs on the rocker shaft rather than the spacer, thats what the spring is for.

[griff2]

hi again

cheers sprocket

as for the rockers ive fitted them already, just forgot the double valve springs lol

cheers
griff2

[Paul Wiginton]

DO make sure you get the correct fitted valve spring height. This can cause spring crush, wandering springs or valve bounce if you get it wrong. You have to be very accurate.

Paul

[Sprocket]

hi again

cheers sprocket

as for the rockers ive fitted them already, just forgot the double valve springs lol

cheers
griff2

Its a head off job then as you will have the rocker spacers instead of the springs