Boxster smoking! Tech has no idea! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

BYprodriver · 07-19-2010, 09:13 AM

Cracked Head ?

anti-bling · 07-19-2010, 09:23 AM

First off, i really, reallllly, appreciate the help.

No "sucking" noise from the cap. How do i clean out the cats? Please explain as i have today off and would love to try another option.

CRACKED HEAD?!!!??! Oh boy. :troll:

I really hope its an easy fix as i just purchased the vehicle 2 months ago. :ah:

extanker · 07-19-2010, 09:34 AM

perhaps you can take it to a shop that can tell what type of smoke it is

tonycarreon · 07-19-2010, 09:50 AM

I assume you've looked in the coolant reservoir - does the coolant look like chocolate milk or normal?

Burg Boxster · 07-19-2010, 10:11 AM

I know the OP said his indy changed the AOS, but I would double check it myself AND the j-tube if he did NOT change. Especially if indy is not overly familiar w/ P-cars. If the white smoke were just generally coming from the car, it could easily be a number of things. Coming from the exhaust though narrows it down. Anyhow, as I said above, check the j-tube - it connects from the AOS to the throttle body (shiny black tube shown here - varies somewhat based on MY though):

Squeeze the connector at end by the throttle body and see if oil is pooling in there. A light misting is all that should be present. If it's more, cleaned it out or change ASAP.

Also, if the AOS was bad, oil (more than the emissions misting) was getting sucked thru the throttle body into the cylinders. That means, assuming TB was not cleaned out, there is still plenty left in the TB and under hard acceleration, the remnants are still getting thru to cylinders. Pull and clean the TB ASAP ...

Throttle Body Cleaning DIY courtesy of Pedro's Garage

Stroked & Blown · 07-19-2010, 10:14 AM

When I cracked the head on my Jeep, the smoke from the exhaust was white and 'felt' moist....like when you put your hand over the exhaust vent of a laundry dryer.

If that's the case, you probably have a cracked head or leaking head gasket that is allowing coolant into the combustion chamber.

jhandy · 07-19-2010, 11:25 AM

If it is not the AOS. (It really sounds like it is), then the cats have oil in them. First off they WILL NOT smoke and then not smoke and then smoke. Just not possiable unless new oil is in there.

If the cats had oil, it will burn out, may damage the cats because of carbon build up.

Same therory goes for the muffler. (except it will not be runied if it was full of oil).

Because it comes and goes, It is either a craked head or gasket like he said. When internal pressure builds the oil blows into the chamber and burns.

But you should look to the most likely spot. The AOS. It may not have been replaced correctly or completly.

I would take it to a dealer, let them fix the AOS, then then send the bill to the INDY shop.

jcb986 · 07-19-2010, 12:39 PM

Thumbs up the AOS installed...it needs to right on or your problem will not go away. The J-tube on top is usually replaced at the same time. Also the lower tube can fail and crack or suck air around the orings. I would check the AOS to be sure it is in correct. There is a place it goes into the block and the notorious boot...usually this is where you might get a problem.