Smoking at start up

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Jan 18, 2008 | 04:48 PM

kmobrien76

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Racer

Joined: Aug 2007

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From: Quincy MA

Smoking at start up

Smoking at start up, that a sign of valve seals needed? Popping thru the carb and running blah above 2K rpms.

Going to bring it to the shop soon, just want to have a clue before I drop it off and say "have a ball with my checkbook."

Kevin

Jan 18, 2008 | 06:06 PM

7T1vette

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Joined: Jan 2006

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From: Crossville TN

Could be valve seals....could be timing problems. But you don't need to say "Have fun with my checkbook." They'll do that anyway.

Jan 18, 2008 | 06:28 PM

mchar

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From: Fairfield, VA

How much smoke? What color? Does it disappear upon warmup? Does the popping thru the carb disappear when warm?

Mark

Jan 18, 2008 | 07:54 PM

kmobrien76

Thread Starter

Racer

Joined: Aug 2007

Posts: 414

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From: Quincy MA

Mark,

Dissappears upon warm up.

Popping thru the carb happens when leaving from a stop light and I mash the gas..

Kevin

Quote:

Originally Posted by mchar

How much smoke? What color? Does it disappear upon warmup? Does the popping thru the carb disappear when warm?

Mark

Jan 19, 2008 | 02:47 AM

Aggitated Monkey

Drifting

Joined: Sep 2007

Posts: 1,572

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From: Wichita Kansas

The smoke on start is valve seals. You will mostlikly find this only happens on cold starting and the oil has had a chance to seep into the cylinders. My '80 has the problem also.

The popping is a tuning problem and could be any number of things. You may look for oil fouled plugs.

Jan 19, 2008 | 08:14 AM

Jud Chapin

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From: Wellington, FL

St. Jude Donor '11 thru '25

You never mentioned the color of the smoke. If it's blue, that's oil. My '76 had it on start up and a change of the valve stem seals fixed the problem.

Jan 19, 2008 | 09:49 AM

kmobrien76

Thread Starter

Racer

Joined: Aug 2007

Posts: 414

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From: Quincy MA

Everything points to valve seals, timing and tune up needed. That's what's in order. I'll suggest it to the repair shop then get their diagnose, estimate, get it done so it's ready for the better weather!!

Kevin

Quote:

Originally Posted by Jud Chapin

You never mentioned the color of the smoke. If it's blue, that's oil. My '76 had it on start up and a change of the valve stem seals fixed the problem.