01-26-2009, 10:26 AM
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#1
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Gone but not forgotten
Join Date: May 2008
Location: Lancaster, CA
Posts: 1,254
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Valves would not seal
Okay over the weekend me and a buddy finished replacing the bad piston I had. We put the engine back together.
Problem:
No compression still in #4 cylinder.
What was done:
Did a compression check got no reading
Pressurized #4 cylinder and felt air coming out through the throttle body
Remove s/c manifold, re-pressurized and heard and felt the air seeping from the valve seat area
What was found: After spraying WD40 on both intake valves would not seal
Anybody have any ideas??
__________________
00' Alero Coupe - Baby is wearing: Custom CAI, Pacesetter headers, custom 2.5" exhaust, 62mm TB, MP45 s/c, B&M ShiftPlus, 6500K HID, KYB-GR2, Eibach springs, R1 Concepts drilled/slotted rotors
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01-26-2009, 10:31 AM
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#2
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Soon to be banned again
Join Date: Nov 2005
Location: Bellmore, NY
Posts: 3,372
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im gonna go out on a limb and say your leaking from somewhere
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I shaved my balls for this?
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01-26-2009, 10:59 AM
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#3
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Now a Ford Traitor.
Join Date: Mar 2008
Location: Greenland
Posts: 6,996
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resurface the valves.... maybe when you detonated you burnt the intake valves
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01-26-2009, 10:59 AM
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#4
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Gone but not forgotten
Join Date: May 2008
Location: Lancaster, CA
Posts: 1,254
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yeah the intake valves for #4 is not closing all the way
__________________
00' Alero Coupe - Baby is wearing: Custom CAI, Pacesetter headers, custom 2.5" exhaust, 62mm TB, MP45 s/c, B&M ShiftPlus, 6500K HID, KYB-GR2, Eibach springs, R1 Concepts drilled/slotted rotors
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01-26-2009, 11:02 AM
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#5
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Now a Ford Traitor.
Join Date: Mar 2008
Location: Greenland
Posts: 6,996
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Quote:
Originally Posted by Alerosaint
yeah the intake valves for #4 is not closing all the way
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so was the valve scored? or was the spring just worn form you bouncing in the 7 - 8K RPM range? |
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01-26-2009, 11:24 AM
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#6
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Gone but not forgotten
Join Date: May 2008
Location: Lancaster, CA
Posts: 1,254
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yeah they were black
__________________
00' Alero Coupe - Baby is wearing: Custom CAI, Pacesetter headers, custom 2.5" exhaust, 62mm TB, MP45 s/c, B&M ShiftPlus, 6500K HID, KYB-GR2, Eibach springs, R1 Concepts drilled/slotted rotors
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01-26-2009, 12:13 PM
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#7
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Owner
Join Date: Nov 2003
Location: Joliet, IL
Posts: 19,932
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if this is a push rod motor it is one of the following
-bend push rod
-bad lifter
-bad valve spring
-bent valve
-bad valve seat
I would remove the head do thorough check of the head
__________________
72 442 "THE BEAST", 99 Alero - OSV Replica w/ original OSV parts, HURST Dual/Gate Shifter
Beware of the BackStabber
 
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