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Changing Valve seals

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Old Mar 16, 2007 | 08:31 PM
  #1  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
Changing Valve seals

My valve seals are shot...every 700 miles i have to change my spark plugs due to filing and oil deposit...and have to add a quart a week..

is there anyway to change them without taking the head off
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Old Mar 16, 2007 | 08:44 PM
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Randy82WS7's Avatar
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
yes its very easy to with the heads on the engine

get the compressor that has the tangs that go into the sides of the valve springs and has the threaded shaft that you turn by hand that pushes down on the valve retainers


very easy and they are cheap at any auto parts store

you will need a fitting for air hose to screw into the spark plug holes, it is cheap too, 14mm size, use the full PSI output of the air compressor, 100 psi or more preferably




good luck
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Old Mar 17, 2007 | 11:19 AM
  #3  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
thanks,do you have a picture of the tool to use
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Old Mar 17, 2007 | 11:30 AM
  #4  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Pictures here: https://www.thirdgen.org/forums/tpi/...tutorials.html
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Old Mar 17, 2007 | 11:37 AM
  #5  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
thanks alot, where did you get the on the block valve compressor and the air chuck..do i just leave the compressor runing to hold in the air or will the air stay in..so the valves dont drop and wut if they do drop??
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Old Mar 17, 2007 | 11:38 AM
  #6  
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From: Madison, WI
Car: 1986 Camaro Z28
Engine: 400
Transmission: T5
Axle/Gears: 10 bolt Posi 3.73
Originally Posted by xgtharo86x
My valve seals are shot...every 700 miles i have to change my spark plugs due to filing and oil deposit...and have to add a quart a week..
Valve seals can cause that many problems?
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Old Mar 17, 2007 | 11:43 AM
  #7  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
has to be cuz my compression is fine and it doesnt smoke at all just when i first start it up cuz the oil in the cylinder and its only on the left side of the block..you got to see the spark plugs get soo much oil and ash deposit.. then they start misfiring and just stop working its horrible
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Old Mar 17, 2007 | 11:51 AM
  #8  
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Originally Posted by xgtharo86x
thanks alot, where did you get the on the block valve compressor and the air chuck..do i just leave the compressor runing to hold in the air or will the air stay in..so the valves dont drop and wut if they do drop??
Any decent parts store or tool store should have the tools. You'll want to leave the compressor running. If the valves drop, you'll have to start tearing things apart to get them.
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