Valve spring chamfering

[BOOT]

Ok seen this done in the past in articles or w/e. I got 9 of my new valve springs that don't fit the retainers, so how much can I chamfer safely? Any preference on the tool PAC, Manley, other?

[BOOT]

Actually they are beehive springs, anyone use a large cone shape stone? What grit are the PAC or Manley tools?

[Racerrick]

you can do it with a seat grinding stone. put a pilot in the spring side of the head, set the spring in its pocket. use a Sioux valve seat stone and holder and hit the spring like your grinding a seat. the spring will self center, watch you dont turn the spring blue,

[mag2555]

It's amazing how many folks do not check this, my hats off to you!
I had one Mopar customer that I ported his heads for and for literally years he was chasing a Hi rpm break up above 7500.

When he finally after changing , up grading and chasing everything but the valve springs , he finally pulled the headsand he found that tight fitting retainers had busted the top winding of the inner springs and the thickness of the out spring was masking the damage!

[Carnut1]

Be sure to polish any part of the spring that has been touched by the stone. Any stressriser can cause spring failure! I always polish any sharp edge on springs. In this case I would machine the retainer and not the spring! Much less chance of failure that way. Retainer must be radiused and polished also. Thanks, Charlie

[BOOT]

Sry no machinery other than basic garage stuff, so I'll be giving it a shot with my cheap drill press. Good point on the bluing I'll be sure to go slow n not overheat the top coil.

I may try another new set of springs I bought these ones too long ago to hassle with replacement. The set I used before, only a couple retainers were tight n prob should of got a slight chamfer.

Looks like the Goodson tool has 80 or 120 grit replacement cones for it's tool, that looks just like the Manley. I can get cone 36, 60, 120 stones from Mcmaster Carr and maybe flapwheel it after.

I need about .003-.004 clearance to fit the retainers, the wire is plenty thick.

[BOOT]

Any suggestion on flap-wheel grits for finish or other method?

[Geoff2]

I always chamfer the end coils of the springs to stop them chafing the retainer & the guide boss. If it is only 0.003-4", just use an emery roll in a drill or die grinder.

[BOOT]

I'm gonna give the cone stones n flap-wheel a shot, I'll try on a few old springs 1st. Also gonna get another set of springs but my luck I'll get another bad batch n still not have enough to do both heads LOL