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Bent Push rods, broken stud & rocker

Forum: C3 Engines, Driveline and Handling

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Bent Push rods, broken stud & rocker

Posted: 2/7/07 10:33pmMessage 31 of 48
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wetvet
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Lake Oswego, OR - USA
Joined: 10/17/2003
Posts: 567
Vette(s): 1972 Steel Cities Gray T Top. Original Owner, Original Paint and Interior. The running gear has been rebuilt. only 250,000 miles on the clock..
Great info from all of you C3ers'.
In this month's VETTE magazine there is an article on rocker arms. Good reading. Check it out.

Steve

 
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Bent Push rods, broken stud & rocker

Posted: 2/13/07 6:53pmMessage 32 of 48
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Another suggestion for youse guys that seem to be having this problem keeping yer rockers rockin...ever hear of a stud girdle? Will definitely solve the problem of breaking the rocker arm studs.

Joel Adams
C3VR Lifetime Member #56    
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Bent Push rods, broken stud & rocker

Posted: 2/13/07 7:00pmMessage 33 of 48
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81Corvette
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Seabeck, WA - USA
Joined: 3/18/2006
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Vette(s): 1981 Red T-Top 450hp / 383ci 3-Speed Auto 63000 12.5 sec 1/4
Yes I saw them in a mag, might do it too.  Just found out yesterday that the root of the problem was actually the lifters. The retaining clips all broke and came out! The one that was pushing on the rocker that broke, the clip was wedged in the lifter piston so it wouldn't pump oil up the push rod, thus the burnt look. The engine builder said they would completely redo the engine. Maybe the push rods were too short or something. I'll post a couple of pix of it.
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Bent Push rods, broken stud & rocker

Posted: 2/13/07 7:06pmMessage 34 of 48
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81Corvette
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Seabeck, WA - USA
Joined: 3/18/2006
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Vette(s): 1981 Red T-Top 450hp / 383ci 3-Speed Auto 63000 12.5 sec 1/4

Bent Push rods, broken stud & rocker

Posted: 4/16/07 9:18pmMessage 35 of 48
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81Corvette
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Seabeck, WA - USA
Joined: 3/18/2006
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Vette(s): 1981 Red T-Top 450hp / 383ci 3-Speed Auto 63000 12.5 sec 1/4
Well after 2 months, my rebuilt 383 is back !!!
I had them install the Harland Sharp rockers and 7/16 th studs.
Yes the actual problem as admitted by the engine shop was the
roller tip rockers. The company that builds them has had several
break. Thanks for all the tips and advice !!!    
Now I'm READY for Carson City !!!!!
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Bent Push rods, broken stud & rocker

Posted: 4/16/07 9:25pmMessage 36 of 48
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Glad to hear you're back in action, Larry! Nice tuh see ya!!

Joel Adams
C3VR Lifetime Member #56    
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Bent Push rods, broken stud & rocker

Posted: 4/16/07 9:27pmMessage 37 of 48
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81Corvette
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Seabeck, WA - USA
Joined: 3/18/2006
Posts: 179
Vette(s): 1981 Red T-Top 450hp / 383ci 3-Speed Auto 63000 12.5 sec 1/4
Thanks Joel !!   Man I missed her.........
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Bent Push rods, broken stud & rocker

Posted: 4/16/07 10:06pmMessage 38 of 48
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rearn2go72
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Bladenboro, NC - USA
Joined: 1/22/2006
Posts: 1058
Vette(s): 1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.
Glad to hear you have her back together Larry. BTW, what gears are you running and what's the torque on your stroker?

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Bent Push rods, broken stud & rocker

Posted: 4/16/07 10:23pmMessage 39 of 48
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81Corvette
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Seabeck, WA - USA
Joined: 3/18/2006
Posts: 179
Vette(s): 1981 Red T-Top 450hp / 383ci 3-Speed Auto 63000 12.5 sec 1/4
Automatic Transmission
  • Three-speed Turbo Hydra-Matic
  • Stock Auto gears as far as I know.
  • gear ratios
    • 1st = 2.52:1
    • 2nd = 1.52:1
    • 3rd = 1.00:1
    • Rev = 1.93:1
  • Final drive ratio: 2.87:1

Haven't cracked the pumpkin open yet.

I'm gonna dyno it after I get it RE-broke in & I'll let ya know.
Your beast still working ??
 
Maybe we need to start a Harland club ?   Thumbs%20Up
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Bent Push rods, broken stud & rocker

Posted: 4/17/07 2:21amMessage 40 of 48
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dwright
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Victor, NY - USA
Joined: 7/12/2004
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Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
Larry,
Glad to hear all is back to normal.
See ya in CC in June.
Dave
 
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