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Motor Blows smoke on decel???? #1033423 07/16/11 01:16 AM 07/16/11 01:16 AM
Joined: Jan 2003 Posts: 1,481 Outside thedriver OP pro stock
thedriver OP pro stock Joined: Jan 2003 Posts: 1,481 Outside	just what the title says, after 11 years of hammering the poop outta my 340, tonite i looked out the back window after i pulled her up to 5500 rpm or so in drive, and saw blueish white smoke out the tail pipes when the engine came down to about 3800rpm after letting off the throttle and coasting down. Is this worn rings? it doesnt smoke in the driveway if i rev it up, nor does it smoke under "normal" driving conditions, if i bring the revs up, and let it decel while gradually backing off the throttle i get no visible smoke ! im really hoping its a tuning issue..... 1973 challenger Dana. 4 speed. Low deck.

Re: Motor Blows smoke on decel???? [Re: thedriver] #1033424 07/16/11 01:25 AM 07/16/11 01:25 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: after 11 years of hammering the poop outta my 340, and saw blueish white smoke im really hoping its a tuning issue. I hate 2 b the bearer of bad news. I'd start w the basics: leakdown/compression. Might b a borderline intake side gasket leaking under the high vac conditions or just (hopefully) valve stem seal(s) live every 24 hour block of time like it's your last day on earth

Re: Motor Blows smoke on decel???? [Re: RapidRobert] #1033425 07/16/11 01:27 AM 07/16/11 01:27 AM
Joined: Jan 2003 Posts: 1,481 Outside thedriver OP pro stock
thedriver OP pro stock Joined: Jan 2003 Posts: 1,481 Outside	im ok with bad news, hell, im lookin for an excuse to build a big stroker anyways! 1973 challenger Dana. 4 speed. Low deck.

Re: Motor Blows smoke on decel???? [Re: thedriver] #1033426 07/16/11 01:31 AM 07/16/11 01:31 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Me too, I'm about to pull the trigger on a 4.5" stroker RB crank (535 cubes) going in a 65 dart live every 24 hour block of time like it's your last day on earth

Re: Motor Blows smoke on decel???? [Re: RapidRobert] #1033427 07/16/11 02:12 AM 07/16/11 02:12 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	usually smoke on deacell is worn intake guides or seals... I am truckless..

Re: Motor Blows smoke on decel???? [Re: 340SHORTY] #1033428 07/16/11 02:22 AM 07/16/11 02:22 AM
Joined: Apr 2010 Posts: 10,570 Sunny South Florida Golden-Arm I Live Here
Golden-Arm I Live Here Joined: Apr 2010 Posts: 10,570 Sunny South Florida	valve seals/guides, would be my first thought, when smoking on deceleration. "When Tyranny Becomes Law, Rebellion Becomes Duty"

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