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01-01-2004, 10:29 PM
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#1 |
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87 short crewcab
Join Date: Jan 2004
Location: duncan okla
Posts: 82
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popping in header like plugs fouling
i have a 400 small block in my 85 chevy with a edlbrock carb and hei ignition. the problem is, when the secondaries are opened up it starts popping through the left header after 3500 rpm.
thanks tbirdman88-donnie |
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01-01-2004, 10:48 PM
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#2 |
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Registered User
Join Date: Nov 2003
Location: Ancaster, Ontario, Canada eh
Posts: 95
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how old is the engine? could maybe have a couple bad exhaust valve seats. the fact that its out just one side is weird
__________________
80 Chevy K10 350/350turbo 86 Chevy 1/2 ton shorty project truck 79 Chevy 1/2ton 350/350turbo not much to look at... ***Retired*** 97 Chevy C1500 4.3/5 speed.....daily driver |
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01-01-2004, 10:56 PM
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#3 |
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87 short crewcab
Join Date: Jan 2004
Location: duncan okla
Posts: 82
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the engine is a 72 4 bolt main. not sure on how old the rebuild is.
I thought it might be a cracked valve seat, or a flat lobe on the cam. still guessing? tbirdman88 |
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01-01-2004, 11:03 PM
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#4 |
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You get what you pay for
 
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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Might be a weak valve spring too. There's a number of things it could be.
__________________
Mike 1985 Chevy C-10 |
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