not sure which section to post this so im gonna post in both. over the weekend i installed a magnaflow muffler on my 05 f150 5.4. today when starting it i noticed i puff of blue smoke, i didnt notice this before installing the muffler but thats not to say it didnt ever. my question is could it be the new muffler breaking in or does it sound like something more serious? the muffler was the 5x8x14 si/do with the pipes ran in front of the wheels, looks and sounds awesome any ideas where the smoke is comin from? again its an 05 with only 10,500 miles.

 

My truck did that for a few days after I installed my Magnaflow exhaust. It also smelled wierd for a while until all the oils and such had burned off the pipes.

 

The muffler is coated with oil from the factory. Used to prevent rust. It will burn off in a couple of days.

 

Exactly, everything you buy for your truck is coated with a factory oil for assembly. The blue smoke indicates oil burn-off. Being that you have a new exhaust system it will take a few days to get rid of the smell. The smoke should be gone in a couple of days.

 

thanks for the replies, makes me feel better.

 

The oil on the new muffler will burn off after the exhaust heats up enough to burn it off, but at start up that is smoke coming from the engine.
The first burst of exhaust dosn't have enough heat to burn anything buy the time it hits the muffler.

 

yea thats what i got to thinking, wife drove it today so i dont know if it did it or not, will check it again in the am.