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Lot of smoke after sitting for months.


jjbunn

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Since getting the 02 I've only started it a few times, a couple of times just after I got it (about six months ago), to make sure it was running alright, then a few weeks ago, when I noticed the valve cover gasket was leaking (which I replaced) and then today, after changing the oil and filter.

Six months ago I don't remember much noticeable smoke out of the tailpipe, maybe a little. A few weeks ago I had smoke in the engine compartment from near the exhaust manifold, which I assumed was due to the leaking cover gasket, which is why I replaced it.

Today it is guffing a lot of grey smoke out of the exhaust, oil burning stuff. I also see some smoke around the block. My neighbors must love me.

What might be the trouble - head gasket? Or would some smoke be expected from an engine that had been sitting this long? Advice sought - thanks!

'73 Malaga 2002 "Cyril" http://bmw2002driver.wordpress.com/

Prior Scruffy Drivers: '69 E-Type 2+2, '74 914, '71 TR6, '73 MGBGT

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Thanks - you're suggesting it's the valve guide seals? How can I confirm that as the cause of the smoking?

'73 Malaga 2002 "Cyril" http://bmw2002driver.wordpress.com/

Prior Scruffy Drivers: '69 E-Type 2+2, '74 914, '71 TR6, '73 MGBGT

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Drive it hard then rev it way up and engine brake in second or so and in about 6 seconds (Your time may vary) you will see a blue cloud behind you. Bad valve seals.

-Nathan
'76 2002 in Malaga (110k Original, 2nd Owner, sat for 20 years and now a toy)
'86 Chevy K20 (6.2 Turbo Diesel build) & '46 Chevy 2 Ton Dump Truck
'74 Suzuki TS185, '68 BSA A65 Lightning (garage find), '74 BMW R90S US Spec #2

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Make *VERY* sure it isn't oil weeping out of the head via the threads on the studs that hold the exhaust manifold on! That's a bulletproof recipe for underhood fire! Hot oil meets even hotter manifold - go whoosh!

Might also be oil from cracked/failing oil pressure switch

As for smoke out the tailpipe...might be a combination of accumulated oil on the rings (from leaky valve seals, while stationary) and what I fondly refer to as "mouse furniture" in the mufflers.

Paul Wegweiser

Wegweiser Classic BMW Services

Nationwide vehicle transport available

NEW WEBSITE! www.zenwrench.com

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When mine sat for a while i had smoke as well. Turned out to be oil leaking from exhaust manifold studs. Check there. Also just do oil change and put some miles on it and see what happens.

1976 BMW 2002 Chamonix. My first love.

1972 BMW 2002tii Polaris. My new side piece.

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Gray Smoke = Excess Fuel

Blue Smoke = Oil

It's definitely gray smoke, not blue. I thought it was oil burning, but perhaps I just have too rich a mixture!

I'm not sure how to proceed with a diagnosis. The car is not driveable - it's on jackstands - so a road test is not viable.

'73 Malaga 2002 "Cyril" http://bmw2002driver.wordpress.com/

Prior Scruffy Drivers: '69 E-Type 2+2, '74 914, '71 TR6, '73 MGBGT

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When mine sat for a while i had smoke as well. Turned out to be oil leaking from exhaust manifold studs. Check there. Also just do oil change and put some miles on it and see what happens.

Ok I will definitely check the manifold studs - thanks.

I just changed the oil and filter, so am good there.

'73 Malaga 2002 "Cyril" http://bmw2002driver.wordpress.com/

Prior Scruffy Drivers: '69 E-Type 2+2, '74 914, '71 TR6, '73 MGBGT

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Gray Smoke = Excess Fuel

Blue Smoke = Oil

It's definitely gray smoke, not blue. I thought it was oil burning, but perhaps I just have too rich a mixture!

I'm not sure how to proceed with a diagnosis. The car is not driveable - it's on jackstands - so a road test is not viable.

I would run it for a while let it idle to operating temperature and rev it for a little bit see if the smoke clears out.

If not maybe you have to adjust your mixture or rebuild your carb. But definitely not half as serious as blue smoke! :)

I'm no longer affiliated with Maximillian Importing Company in any way, please address any questions directly to them.  -Thanks.

2002 "tii" coupe 1970
E21 320/6 2.7 Stroker 1981
E23 730 1978

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Maybe you have something clogging your air filter? Mouse perhaps?

-Nathan
'76 2002 in Malaga (110k Original, 2nd Owner, sat for 20 years and now a toy)
'86 Chevy K20 (6.2 Turbo Diesel build) & '46 Chevy 2 Ton Dump Truck
'74 Suzuki TS185, '68 BSA A65 Lightning (garage find), '74 BMW R90S US Spec #2

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How old is the fuel in the tank? the new fuels with ethanol have a very short life sitting in your fuel tank. before you take anyting apart try draining the tank and refilling with fresh fuel. + everyting above.

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

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How old is the fuel in the tank? the new fuels with ethanol have a very short life sitting in your fuel tank. before you take anyting apart try draining the tank and refilling with fresh fuel. + everyting above.

It's a mixture of about 1 gallon very old (> 6 months) gas and 1.5 gallons of very new gas. I did put some Stabil in the tank a while back ...

I don't have a manual choke on the car - it's a water choke.

Julian

'73 Malaga 2002 "Cyril" http://bmw2002driver.wordpress.com/

Prior Scruffy Drivers: '69 E-Type 2+2, '74 914, '71 TR6, '73 MGBGT

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I would put my money on carb problems. Maybe it's not the best thing to do but run it for a while as I said above and close the mixture screw a bit see if that does something... If it's a lot of smoke though I don't think that'll do the trick and anyway you will probably only be covering up the real problem.

I'm no longer affiliated with Maximillian Importing Company in any way, please address any questions directly to them.  -Thanks.

2002 "tii" coupe 1970
E21 320/6 2.7 Stroker 1981
E23 730 1978

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