Thread: 454 TBI rebuild
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Old 07-01-2009, 02:46 PM   #10
FiredUpZ28
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1999 Pontiac Firebird
 
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if it blows smoke after sitting for a while, its the valve seals. Do a cylinder leakage test it'll tell you right away if its the rings or not. Compression check with oil in the cylinder will as well. If you have better compression with oil in the cylinder then its the rings.
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