Warning.
Registered User
Joined: Sep 2004
Posts: 1,152
From: Wyoming
Re: Warning.
Lol all my rockers were loose...im a moron, i bent 4 pushrods and collapsed 11 lifters(they fell completely apart) but i feel your pain for droping a valve.
I have never trusted anyone to work on any of my or my families vehicles but i dont know if i even trust my self anymore.
I have never trusted anyone to work on any of my or my families vehicles but i dont know if i even trust my self anymore.
Registered User
Joined: Jul 2002
Posts: 3,768
From: Friendswood, TX, USA
Re: Warning.
Originally Posted by 1-bad-z28
I'm also kinda confused on why you can't use guide plates with SA rockers. Seems like to me it would only give extra assurance that the rockers won't come off the valve. The guide plates keep the pushrods straight, correct? The SA rockers have the extra lip on the roller tip to keep them on the valve. I don't see how one would interfere with the other because on a SA rocker setup the pushrods should already be straight but in case the roller tip gave way it would only keep it there anyways instead of falling off. Maybe those that believe the guide plates would get in the way could explain why.
If you use both they end up "fighting" against each other, causing ware on either the guide plate or the SA tip washers(alignment disc's), or the valve tips or the push rods or all of the above. This can lead to premature ware and/or failure of the valve guides, valve tips, push rods, guide plates, lifters, lifter bores, etc.
If you look at the rocker design it's obvious that it is allowed to pivit around the rocker arm stud for this reason. Do one or the other not both.
Registered User
Joined: Jul 2001
Posts: 1,887
From: Kingsport, TN
Re: Warning.
Originally Posted by Z28SORR
In a perfect world, the alignment of the lifter, push rod, rocker, and valve would all be aligned in a perfect vertical plane. There would be no angular misalignments. Unfortunately, it aint perfect, and the angular misalignments cause side loads on the rocker. They cause the rocker to yaw (the tip moves for and aft) as the valve goes from closed to open and back. The SA rockers allow the push rod end to move and maintains the valve end alignment. The guide plates keeps the push rod end aligned and allows the valve end to move.
If you use both they end up "fighting" against each other, causing ware on either the guide plate or the SA tip washers(alignment disc's), or the valve tips or the push rods or all of the above. This can lead to premature ware and/or failure of the valve guides, valve tips, push rods, guide plates, lifters, lifter bores, etc.
If you look at the rocker design it's obvious that it is allowed to pivit around the rocker arm stud for this reason. Do one or the other not both.
If you use both they end up "fighting" against each other, causing ware on either the guide plate or the SA tip washers(alignment disc's), or the valve tips or the push rods or all of the above. This can lead to premature ware and/or failure of the valve guides, valve tips, push rods, guide plates, lifters, lifter bores, etc.
If you look at the rocker design it's obvious that it is allowed to pivit around the rocker arm stud for this reason. Do one or the other not both.
Thread Starter
Registered User
Joined: Dec 1969
Posts: 3,499
From: PORTLAND, OR, MULTNOMAH
Re: Warning.
Just got off the horn with an engine builder. He concurs with you. He said use one or the other. He did say that if there is enough "slop" that it wouldn't hurt anything, but otherwise probably best to go with NSAs and guide plates.
Now I'm really pi$$ed, but be aware that I will probably have a nice set of 1.6 Crower SA RRs for sale along with some REV springs good for 1.6RRs...and if things don't start looking up a damn 97SS.
Now I'm really pi$$ed, but be aware that I will probably have a nice set of 1.6 Crower SA RRs for sale along with some REV springs good for 1.6RRs...and if things don't start looking up a damn 97SS.
Thread Starter
Registered User
Joined: Dec 1969
Posts: 3,499
From: PORTLAND, OR, MULTNOMAH
Re: Warning.
So in conclusion: I'd say to anyone contemplating going with RRs to NOT go with SAs, but to go with Non SA RRs with guide plates and hardened push rods, AND....be sure to get the correct springs. JMHO
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