Home Menu

Menu


Pontiac - Race The next Level

          
PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Race > pushrods rubbing??
Reply
 
Thread Tools Display Modes
  #1  
Old 09-20-2015, 07:45 PM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default 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

Reply With QuoteReply With Quote
  #2  
Old 09-20-2015, 08:05 PM
tom s tom s is offline
Ultimate Warrior
  
Join Date: Jan 2000
Location: long beach ca usa
Posts: 18,796
Default
What dia push rods?Tom

Reply With QuoteReply With Quote
  #3  
Old 09-20-2015, 08:06 PM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default
5/16

Reply With QuoteReply With Quote
  #4  
Old 09-20-2015, 08:16 PM
rod cole rod cole is offline
Chief Ponti-yacker
  
Join Date: Oct 2006
Posts: 790
Default
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

Reply With QuoteReply With Quote
  #5  
Old 09-20-2015, 08:19 PM
Tim Corcoran's Avatar
Tim Corcoran Tim Corcoran is offline
Ultimate Warrior
  
Join Date: Jan 2000
Location: Willow Spring, North Carolina
Posts: 4,704
Default
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.

__________________
Tim Corcoran
Reply With QuoteReply With Quote
  #6  
Old 09-20-2015, 08:25 PM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default
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

Reply With QuoteReply With Quote
  #7  
Old 09-20-2015, 08:50 PM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default
How much is safe to remove?

Reply With QuoteReply With Quote
  #8  
Old 09-21-2015, 06:42 AM
steve25's Avatar
steve25 steve25 is online now
Ultimate Warrior
  
Join Date: May 2008
Location: Westchester NY
Posts: 14,754
Default
Tons of meat there at the bottom ,you can grind off a easy .060" with room to spare

__________________
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!
Reply With QuoteReply With Quote
  #9  
Old 09-21-2015, 09:53 AM
Rob B's Avatar
Rob B Rob B is offline
Ultimate Warrior
  
Join Date: Mar 2002
Location: Lawrenceburg IN
Posts: 5,616
Default
Quote:
Originally Posted by rod cole View Post
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
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.

__________________
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!
Reply With QuoteReply With Quote
  #10  
Old 09-21-2015, 10:01 AM
PONTIAC DUDE's Avatar
PONTIAC DUDE PONTIAC DUDE is offline
Ultimate Warrior
  
Join Date: Dec 1999
Location: West Central Florida
Posts: 14,756
Wink
A sight rub won't hurt anything and will also help control flex.

Reply With QuoteReply With Quote
  #11  
Old 09-21-2015, 11:26 AM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default
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

Reply With QuoteReply With Quote
  #12  
Old 09-21-2015, 11:37 AM
RA462's Avatar
RA462 RA462 is offline
Ultimate Warrior
  
Join Date: Sep 2002
Location: Woodville,Oh,US
Posts: 1,149
Default
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.

__________________
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
Reply With QuoteReply With Quote
  #13  
Old 09-21-2015, 11:51 AM
Mike Davis's Avatar
Mike Davis Mike Davis is offline
Ultimate Warrior
  
Join Date: Jun 2000
Location: Athens Ga, or at a NMCA race
Posts: 1,994
Default
Quote:
Originally Posted by dirtbkr89 View Post
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
\
What wall pushrod?
Spring Pressure?
I have seen allot of pushrods rub the head due to the pushrod flexing.

__________________
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
Reply With QuoteReply With Quote
  #14  
Old 09-21-2015, 12:19 PM
dirtbkr89 dirtbkr89 is offline
Junior Member
  
Join Date: Mar 2015
Posts: 29
Default
1-Piece .083 X 5/16 .040 Oil Restricted Chromemoly Pushrods

440 lb spring pressure

Reply With QuoteReply With Quote
  #15  
Old 09-24-2015, 07:21 AM
grandville455's Avatar
grandville455 grandville455 is offline
Ultimate Warrior
  
Join Date: Jan 2003
Location: Chippewa Falls,WI 54729
Posts: 10,839
Default
Quote:
Originally Posted by dirtbkr89 View Post
1-Piece .083 X 5/16 .040 Oil Restricted Chromemoly Pushrods

440 lb spring pressure
That kind of pressure i would be using .116 wall, IMO

__________________
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
Reply With QuoteReply With Quote
  #16  
Old 09-24-2015, 07:44 AM
JSPONT's Avatar
JSPONT JSPONT is offline
Ultimate Warrior
  
Join Date: Jul 2014
Location: ROCKY POINT NY
Posts: 2,917
Default
Quote:
Originally Posted by grandville455 View Post
That kind of pressure i would be using .116 wall, IMO
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.

Reply With QuoteReply With Quote
  #17  
Old 09-24-2015, 08:59 PM
Mike Davis's Avatar
Mike Davis Mike Davis is offline
Ultimate Warrior
  
Join Date: Jun 2000
Location: Athens Ga, or at a NMCA race
Posts: 1,994
Default
Quote:
Originally Posted by grandville455 View Post
That kind of pressure i would be using .116 wall, IMO
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

__________________
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
Reply With QuoteReply With Quote
Reply

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 04:03 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Contact Us Home
Copyright © 2017