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Old Apr 8, 2006 | 08:03 PM
  #1  
gasman305h.o.'s Avatar
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Joined: Jan 2006
Posts: 33
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From: Alabama
Car: 1984 Pontiac Trans Am
Engine: 305
Transmission: T5
Axle/Gears: 9 bolt posi 3.27
lost

what would cause a brand new engine to have 0 compression?
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Old Apr 8, 2006 | 08:06 PM
  #2  
Sonix's Avatar
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Joined: Jul 2004
Posts: 10,763
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
haha, ouch! does it run?
across the board, or only on certain cylinders?

-loose fitting on your test
-forgot some rings
-forgot some pistons
-forgot some valves
-gigantic crack in block or heads
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Old Apr 8, 2006 | 08:08 PM
  #3  
CEP89's Avatar
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Joined: Feb 2003
Posts: 263
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From: White Lake, MI
Car: 89' IROCZ
Engine: 5.7 L98
Transmission: 700r4
incorrect valve adjustment
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Old Apr 8, 2006 | 08:52 PM
  #4  
gasman305h.o.'s Avatar
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Junior Member
 
Joined: Jan 2006
Posts: 33
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From: Alabama
Car: 1984 Pontiac Trans Am
Engine: 305
Transmission: T5
Axle/Gears: 9 bolt posi 3.27
the starter turns it, and i've only checked the #1 cylinder for compression and it didnt even move the needle. but i did put a higher lift cam in it so i hope its just needs a valve adjustment.
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Old Apr 8, 2006 | 09:30 PM
  #5  
84z28350's Avatar
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Joined: Aug 2005
Posts: 3,004
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From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
How did you tighten the rockers?

If their cranked down too much the valve can stay open and "leak"
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Old Apr 8, 2006 | 10:08 PM
  #6  
gasman305h.o.'s Avatar
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Junior Member
 
Joined: Jan 2006
Posts: 33
Likes: 0
From: Alabama
Car: 1984 Pontiac Trans Am
Engine: 305
Transmission: T5
Axle/Gears: 9 bolt posi 3.27
yeah thats what it was, i backed the rockers off a 1/4 turn and i get awsome compression now, thanks for the help
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