White smoke only after pressing the gas pedal

savannahz · 02-16-2019, 06:23 PM

Hey,

I have an issue where I'm getting white smoke through both exhaust pipes. If I start the car and don't touch the gas I don't get any smoke. If I even slightly touch the gas peddle, say a few hundred rpm's, it starts to smoke. I can then restart the car, not touch the gas, and it won' t smoke. If I hold the the rpm's around 2k, I get a cloud. The smoke is thick and white and smells kind of rubbery. I'm not losing coolant or oil. I was originally thinking condensation, but it does it warm or cold. It was around 70 here in Georgia...of course, it is low humidity and that may play a part.

I just started getting wastegate rattle I can hear at idle, accelerating, and decel. I can make it stop by unplugging either vacuum canister (one at a time).

When researching, it seems to point to turbo seals. Since I just did a OFHG, I had oil everywhere. I cleaned it up the best I could and took a look again today two months later. There is some oil where the trans meets the block. This seems to be right under the rear turbo. I snapped a few pics. The first is the rear turbo, does that look like it's leaking? I don't see oil upstream, but it's hard to see.

What do you guys think? Thanks

alexg212 · 02-17-2019, 10:47 AM

I’d put my money on a valve cover leak. That looks like fresh oil. Symptoms are typical. I’d pull plugs just to be thorough and see if there’s oil or fuel on them in the morning. Notice any smoking when warm? I had the exact same symptoms before. Particularly when sitting at idle when engine at full temp for several minutes, then accelerating a few mph and letting it decel under load, plumes of smoke.

Mike@N54Tuning.com · 02-18-2019, 08:24 AM

Quote:

Originally Posted by alexg212

I’d put my money on a valve cover leak. That looks like fresh oil. Symptoms are typical. I’d pull plugs just to be thorough and see if there’s oil or fuel on them in the morning. Notice any smoking when warm? I had the exact same symptoms before. Particularly when sitting at idle when engine at full temp for several minutes, then accelerating a few mph and letting it decel under load, plumes of smoke.

Valve cover leak is pretty common so I would start there as suggested..

Mike

savannahz · 02-18-2019, 09:34 AM

Thanks for the suggestions. I cleaned the engine with simple green and am going to check in a week for oil. It could have been residual from the OFHG which was leaking pretty heavily when I fixed it.

As for the white smoke, I drove it to work this morning and the temp was in the 50's. It wasn't smoking after a 30 minute drive, so I'm hoping it was just condensation I was seeing before. I'm not losing coolant, nor oil.

02-16-2019, 06:23 PM	#1
savannahz Private 21 Rep 75 Posts Drives: 2016 M4 Vert Join Date: Feb 2015 Location: Georgia iTrader: (0)	White smoke only after pressing the gas pedal Hey, I have an issue where I'm getting white smoke through both exhaust pipes. If I start the car and don't touch the gas I don't get any smoke. If I even slightly touch the gas peddle, say a few hundred rpm's, it starts to smoke. I can then restart the car, not touch the gas, and it won' t smoke. If I hold the the rpm's around 2k, I get a cloud. The smoke is thick and white and smells kind of rubbery. I'm not losing coolant or oil. I was originally thinking condensation, but it does it warm or cold. It was around 70 here in Georgia...of course, it is low humidity and that may play a part. I just started getting wastegate rattle I can hear at idle, accelerating, and decel. I can make it stop by unplugging either vacuum canister (one at a time). When researching, it seems to point to turbo seals. Since I just did a OFHG, I had oil everywhere. I cleaned it up the best I could and took a look again today two months later. There is some oil where the trans meets the block. This seems to be right under the rear turbo. I snapped a few pics. The first is the rear turbo, does that look like it's leaking? I don't see oil upstream, but it's hard to see. What do you guys think? Thanks Attached Images
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02-17-2019, 10:47 AM	#2
alexg212 Second Lieutenant 52 Rep 278 Posts Drives: 335is Coupe/Mustang Gt Join Date: Oct 2013 Location: DFW iTrader: (0)	I’d put my money on a valve cover leak. That looks like fresh oil. Symptoms are typical. I’d pull plugs just to be thorough and see if there’s oil or fuel on them in the morning. Notice any smoking when warm? I had the exact same symptoms before. Particularly when sitting at idle when engine at full temp for several minutes, then accelerating a few mph and letting it decel under load, plumes of smoke.
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02-18-2019, 09:34 AM	#4
savannahz Private 21 Rep 75 Posts Drives: 2016 M4 Vert Join Date: Feb 2015 Location: Georgia iTrader: (0)	Thanks for the suggestions. I cleaned the engine with simple green and am going to check in a week for oil. It could have been residual from the OFHG which was leaking pretty heavily when I fixed it. As for the white smoke, I drove it to work this morning and the temp was in the 50's. It wasn't smoking after a 30 minute drive, so I'm hoping it was just condensation I was seeing before. I'm not losing coolant, nor oil.
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