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Pop's big block 396 has been fouling the
#5 plug for a while. He bought an extender and still no success.Tore into the
motor and found #5 exhaust spring was broke, thankfully it did not drop.He built
the motor with good valve springs for the intake but took a short cut on the
exhaust (used ones ).Would a broke exhaust valve spring cause a lot of fouling
and cause the motor to run bad at idle? There is no signs of water in the
oil .Any help or other places to check.thankx
Doug
Fugere
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