Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Exaust port smoking

Recommended Posts

Hi All,

I have a 2003 Response LXI with a 335 Monsoon. I noticed this year that the underside of my exaust ports gets a little smoke coming off of them after I have been driving above 3000 rpms for a couple minutes. The smoke only lasts a couple seconds after I stop to look. At first i just thought it was just something that got spilled on it last fall, but it keeps happening. The paint is also all burned/corroded off on the bottom of all the exaust ports. All the exaust ports are like this. The cooling system is fine, the risers are not hot. I'm pretty sure the exaust is not leaking. I checked to see if the valve cover gaskets were leaking oil onto the exaust but they seem fine too.

Any ideas? Is this normal to see smoke from the exaust ports? Is it possible the exaust is running too hot and burning the paint off causing smoke? Or maybe the paint is getting old and burning?





Link to comment

Looks like there is a lack of water flow at the base of the exhaust manifolds.I would pull them off and check for internal debris in the manifolds and passages between them, the risers and other water passages. You might also want to look at your impeller and trans cooler for debris (impeller parts, weeds, etc.).

Link to comment

I am going to naively suggest that the manifolds are normal and that the part without paint is the exhaust only part, the water jackets are above the exhaust inlets. I have an old set laying around and may just cut one in half and see.

Edited by Bozboat
Link to comment

i had a simmilar issue on my 2002 monsoon it was a combination of storage spray burning off and a very slight leak anter an oil change. the valve cover gasket seeped just a bit when the oil was filled. i ran it for a day and then wiped it all with break cleaner to remove any residue and it has been all good since. There should be very little if any water in that part of the exhaust manifold

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...