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#1
08-14-2003, 01:06 AM
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hey everyone, ijust joined and need help
i have a 1991 civic hb si and have a problem. ihave my cat disconnected and when i reach 3000 rpm, a noise starts to sound. Also when i connect it back, blueish smoke comes ot when i gun the accelerator. My friend said it could be that my cat needs replacing. Also my car is repiped to 2 or 2 1/2 in. piping. When i checked my motor oil today i had no oil in there. Could it be burning the oil? -Help
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Si Hatch '91 
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#2
08-18-2003, 09:17 AM
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sounds like burning oil, is the noise a loose heatshield? or something like that , where is the noise comign from exactly?
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Jim - Your Resident EDM Biatch B16A1 I/H/E 4TH GEN UK SITE Honda Civic EE9 1.6-i VT
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#3
08-18-2003, 01:32 PM
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Blue smoke = burning oil
no oil in motor = bad keep in mind the dipstick only shows up to 1 quart low...if the idiot light in the dash comes on, it is probably already too late. Excessive oil consumption in theory could clog the cat...but I doubt the cat is causing the blue smoke directly. Welcome 
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-Shawn '91 Civic DX sedan DOHC ZC, I,H,E, urethane bushings and mount inserts, rock chipped hood, some rust, stock steelies, nice comfy Integra seats, and the A/C works! What else could you want from an 18 year old car with 241,000 miles? Working on getting the Si tranny in now 
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#4
08-22-2003, 12:40 AM
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Re: hey everyone, ijust joined and need help
Quote:
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Si Hatch '91
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#5
08-22-2003, 12:44 AM
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Re: hey everyone, ijust joined and need help
Quote:
My friend says my cat may need replacing if it sounds like there is a whole bunch of stuff inside the cat when i take it off and shake it. Is this true?
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Si Hatch '91
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#6
08-22-2003, 12:44 AM
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get a zc and have a custom 2 1/4 piping exhaust with a high flow cat and your problems will be fixed
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BRET  11/07/87 - 11/11/04 *** KEITH VALLEE*** R.I.P Keith. higher then any mother fucker out there..... R.I.P homie..
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#7
08-22-2003, 04:49 AM
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BLUE smoke = BURNING COOLANT
WHITE grey or black smoke = burning oil if ur spitting out blue smoke you are likely to have a blown head gasket most common cause for oil burning is bad piston rings
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94 Integra LS, autotragic, Tons of mods 93 Accord wagon, Manual conversion and f20b swap in the near future!
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#8
08-22-2003, 04:54 AM
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Last time I checked it was blue = oil, white = water
 If the head had gone and it was coolant - he'd have emulsion as well as smoke - he has no oil... not too hard to figure out Sounds like valves or rings have gone at the least. Rebuild the motor or drop a replacement in. Yes the cat will be choked.. throw it and replace it. The rattle could well be it's heatshield coming loose - it happens. The cat is totally unrelated to the smoke - your friend is full of shit.  Cheers
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#9
08-22-2003, 09:21 AM
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Yeah...what Setanta said... I removed my heatshield on my cat a while back...but for a long time, I just had it clamped with big-ass hose clamps and that worked for years
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-Shawn '91 Civic DX sedan DOHC ZC, I,H,E, urethane bushings and mount inserts, rock chipped hood, some rust, stock steelies, nice comfy Integra seats, and the A/C works! What else could you want from an 18 year old car with 241,000 miles? Working on getting the Si tranny in now
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