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#1
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pushrods rubbing??
So after assembly on my 461 we noticed my pushrods are rubbing on my edelbrock heads. I thought they were supposed to clear 1.65?? Anyone else have this issue?? I am running solid roller and harland sharp 1.65 rockers. Pushrods were measured and ordered the correct lenghts
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#2
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What dia push rods?Tom
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#3
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5/16
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#4
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My 1st gen edelbrocks rubbed at the bottom of the tubes quite a bit with a flat tappet cam. 5/16 rods thought I was the only one Rod
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#5
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You got two choices, remove the heads and have the pushrod holes enlarged or switch to 1.5 rockers. I can understand your frustration as you would think the heads should clear.
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Tim Corcoran |
#6
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Yeah i already have It apart and going to To open up the holes. Its just crazy everyone I have talked to says there's clear
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#7
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How much is safe to remove?
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#8
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Tons of meat there at the bottom ,you can grind off a easy .060" with room to spare
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#9
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Ditto. Had to clearance the sides on a couple of the holes on my 2nd gens when I put them on my aftermarket block. Still running a flat tappet.
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74 GTO Bracket/Street car and another 74 for the wifey to race with! 70 GTO 400, 4 spd, #'s matching and a little to nice for me to own. Friendship is like peeing your pants..everyone can see it but only you can feel the warmth! |
#10
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A sight rub won't hurt anything and will also help control flex.
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#11
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It's not a slight rub once I really watched it. It was almost flexing the pushrod. Do the Louis tools work on the e heads
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#12
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Careful. I had the same issue with my High Ports (but at the top of the pushrod hole) when I changed to a higher lift camshaft. Cost me broken lifter bore and junked a block I had 2K in.
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Todd Sedlmeier Who ever thought pinewood derby cars would lead to this! October 2004 HPP Shootout participate http://www.highperformancepontiac.co...out/index.html 86 Grand Prix 535 High Port 8.93 @ 153 65 GTO 433 High Port 12.04 @ 113 |
#13
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Quote:
What wall pushrod? Spring Pressure? I have seen allot of pushrods rub the head due to the pushrod flexing.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#14
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1-Piece .083 X 5/16 .040 Oil Restricted Chromemoly Pushrods
440 lb spring pressure |
#15
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That kind of pressure i would be using .116 wall, IMO
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#16
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X2^^^^ A friend of mine had such bad push rod flex it looks like the push rod was touching the head the hole way down. There was a thread on here somewhere. I went to 3/8 manton push rods. Heads had to be clearenced and new guide plates.
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#17
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Agree, that is why I asked the thickness. Had the same issue the op is having using .083. Changed to Smith Bros .116- problem gone and the car picked up .10
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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