Thread: Steel roller tipped rockers hitting spring retainers

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I have a gen 1 95-00 350 block with rear pad # 10243880. It is a roller block, but I am running a hydraulic flat tappet cam. Iwas running 69-327 heads and began having rocker issues, constantly having to adjust them. I put some roller tipped rockers on and still had the same problem. Immediately after christmas I redid the top end, double roller Cloyes chain 96 swirl port heads, and a howards cam and lifters. Cam is.480 valve lift, and 288 duration with a 108 lobe center. I am still having the lifter bang after installing another set of new self aligning steel roller tipped rockers, and new stock length push rods. When near a curb, or another vehicle it is very noticable. I pulled # 2 exhaust rocker and saw that it is hitting the spring retainer. The rockers are from Assault Racing which may be my problem. Steel tippped roller's with poly locks. When adjusting the rockers I can barely get the socket on top of the poly lock with out dropping it down inside and stalling the engine.
Is it possable to put the stock 1.5 rockers back on with this cam, or will the slots be too short.
Any advice would be appreacited!!

with the 69 head there are sloted guide holes in the heads that hold s push rod tracking .less the boss,s been cut down and guild plate use with screw in studs then you drill the heads out were the sloted holes are in the heads .there is no need for self guided rockers for stock 69 heads if you used a +050 valve lock or a +100 valve spring retainer. the retainer will run in to the rocker arms you will need to run a shorter set up on valve spring that will let you run a retainer with no recess/off set . were locks are. or if a shorter spring can not be used then use a longer valves with retainers with no off set or set heads up with guide plates use STd/ non tracking roller rocker . many after market retainer have alot of off set to use a taller spring in the heads but on guided rocker you need the see that the valve stem is at the tallest part to clear rocker tip

I know now that the self aligning rockers were wrong for the 327 heads!! The swirl ports have the holes for the guide plates, but I am wondering now if the self aligning rockers are wrong for these heads too. I have only pulled the 1 exhaust rocker so far, and could see where it hit a little on the retainer. Is it possable to use the stock 1.5 rockers with my current camshaft, or will it be another disaster that will saw my studs in half??? The push rod holes in these heads look like the 327's did even though their 96 heads.
Bob

Originally Posted by Bobwall1

I know now that the self aligning rockers were wrong for the 327 heads!! The swirl ports have the holes for the guide plates, but I am wondering now if the self aligning rockers are wrong for these heads too. I have only pulled the 1 exhaust rocker so far, and could see where it hit a little on the retainer. Is it possable to use the stock 1.5 rockers with my current camshaft, or will it be another disaster that will saw my studs in half??? The push rod holes in these heads look like the 327's did even though their 96 heads.
Bob

it s not just if the head has a slot and guided or just drilled out it is that your runing the wrong retainer and or valve locks that putting the retainer up were the roller tip needs room to track if the heads have gulde slots you run a stander roller tip rocker 1.5 will work so will a 1.6 but needs to be checked may need a louis tool /sloting tool

The Assault rockers should work,your stock 1.5's are good for no more than about .460 lift what you should do is order this:http://www.summitracing.com/parts/hrs-92130/overview/ My gut tells me you have an issue with pushrod length.Take some time and read this:http://www.cpgnation.com/forum/comp-...tech-2662.html

WELL #ONE ..first off never use a guilded rocker on a guilded head or with guid plates or guild plates on heads that are guilded less your looking for bad things added wear and bent stuff will be in your future#TWO .. push rods that are right for rocker mild lift or pattern them with layout. push rod length come in to play on any after market rocker but hittting the hat part of the retainer that can be a + retainer or 050 + locks or all. rocker hitting can be from to much setup height or needing a longer push rod may need to be used or use rockers that will clear the retainer . and if this fails you need a short set up then go back and read post #4

Pat My problem may be that these roller tipped rockers are evidently for vortec heads. When I ordered them it said self aligning/ vortec. Is there a difference in angle on the vortec heads or something ??
I figure'd they would be basically the same as my swirl ports? They were the only self aligning roller tips that they had. I dont want to go through the hassle and expense of putting in guide plates at this point.
Bob