BB Chevy eating keepers

Alan Roehrich · 11-21-2011, 07:42 PM

If the rockers hit the retainers, they're tilting the retainers and trying to un-key the valve every time the engine spins over 4 times. You're lucky that you haven't done even more damage. That is most certainly the problem.

Most modern rockers for a big block will clear a 1.650" spring and retainer with relative ease, provided the valvetrain geometry is correct.

tommy d · 11-21-2011, 09:04 PM

I'm wondering about the geometry. We do run lash caps and I can see witness marks on the underneath side so they must be the right depth. If I remember correctly the lash caps were supposed to help a geometry problem that we had. Will T&D or Jesell shaft rockers eliminate that problem?

Alan Roehrich · 11-22-2011, 01:30 AM

Well, shaft rockers are the way to go, if you can afford them, and Comp has a good deal on theirs.

If you're running lash caps and you're still hitting the retainers with the rockers, odds are your pushrod is too short.

11-21-2011, 07:42 PM	#1
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,573 Liked 1,837 Times in 417 Posts	Re: BB Chevy eating keepers If the rockers hit the retainers, they're tilting the retainers and trying to un-key the valve every time the engine spins over 4 times. You're lucky that you haven't done even more damage. That is most certainly the problem. Most modern rockers for a big block will clear a 1.650" spring and retainer with relative ease, provided the valvetrain geometry is correct. __________________ Alan Roehrich 212A G/S

11-21-2011, 09:04 PM	#2
tommy d Senior Member Join Date: Oct 2010 Location: Indiana Posts: 830 Likes: 1,613 Liked 359 Times in 135 Posts	Re: BB Chevy eating keepers I'm wondering about the geometry. We do run lash caps and I can see witness marks on the underneath side so they must be the right depth. If I remember correctly the lash caps were supposed to help a geometry problem that we had. Will T&D or Jesell shaft rockers eliminate that problem?

11-22-2011, 01:30 AM	#3
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,573 Liked 1,837 Times in 417 Posts	Re: BB Chevy eating keepers Well, shaft rockers are the way to go, if you can afford them, and Comp has a good deal on theirs. If you're running lash caps and you're still hitting the retainers with the rockers, odds are your pushrod is too short. __________________ Alan Roehrich 212A G/S

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