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Author
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Topic: Roller to valve stem movement odd?
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 06-30-2002 12:30 AM
   
When I adjusted my solid lifter lash, it seems odd that the rockers have so much side to side movement. Some of the rollers were over so far as the edge of the roller is in the center of the valve stem. This sure does not seem right. Should I take my guide plates off, cut them in half, and squeeze the slots narrower and then reinstall aligned? Is there a better way? What brand of guide plates are good?
Thanks,
Dave
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fastbackRb
Journeyman Posts: 79
From: Columbus,Ga.
Registered: May 2002
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posted 06-30-2002 01:10 AM
Dave what kind of heads are you talking about? You could have the wrong size push rods for the guide plates that you have or the push rods might not be hardened. Anyway you look at it there is a problem they should not move that much. Find the problem before cutting the plates. Rudy ------------------
70 fastback cleveland 5.80's@117 (broke it)
69 cougar elimnator Boss 302
84 droptop 5.0
86 hatchback 289
92 explorer
97 f350 dullie power stroke
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 06-30-2002 01:19 AM
So how do I know if my pushrods are hardened? That is what I asked for when I bought them. They are blackish with some ware marks already. Heads are World JRs. Rockers are Crane Blazers. I was wondering if I had guide plates for larger pushrods. How much clearance between pushrod and guideplate should there be?
dave------------------
'70 ragtop Stang
351W - ready to race!
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fastbackRb
Journeyman Posts: 79
From: Columbus,Ga.
Registered: May 2002
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posted 06-30-2002 01:30 AM
Dave there should be no ware marks if they are hard.(If you pull the push rod and there is ware it will be smaller where it moves in the guide plate.) If it is just polished looking then that is normal.Check the plates for ware. Look at the slotes in the plates and make sure they are straight not wollered out. There should be very little clearence between the rod and the plate. (My cleveland has about .010 to .015 ). Rudy ------------------
70 fastback cleveland 5.80's@117 (broke it)
69 cougar elimnator Boss 302
84 droptop 5.0
86 hatchback 289
92 explorer
97 f350 dullie power stroke
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 06-30-2002 09:20 AM
There's my problem! I have at least 0.125 or more cleareance. I'm now thinking that the plates are for a thicker pushrod.
Dave
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 07-01-2002 08:32 AM
I just checked my clearance and have .075 between pushrod and guide plate. I'm not sure what to do at this point, are there narrower guide plates?
Dave
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Mike_R
Gearhead Posts: 151
From: Indianapolis, IN 46237
Registered: Feb 2001
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posted 07-01-2002 09:08 AM
Maybe those guide plates are made for 3/8" pushrods and you have 5/16"?The guideplates should fit fairly snug against the side of the pushrods. The pushrod should be able to move freely, but the guideplates will be right up agianst it. You will still have some side to side movement in the rocker by the way, but it will be greatly reduced. Some of my guideplates on my engine got kind of worn and had extra clearance there, so I tapped them with a hammer to close up the gap. However the .080" you mentioned is alot. It sounds like they are made for a larger pushrod.
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 07-01-2002 09:33 AM
MikeR,
Thanks, that's what I'm thinking, I'll make a few calls tomorror about guideplates; today is a national holiday in Canada.
Dave
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