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How do you clean engine oil sludge out of air intake ports?

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Topic starter

Odd question. I have better pictures of exactly what I mean, but I am unsure how to share.

Here is the story. I bought a 2006 Toyota Corolla last year, now with 96,000 miles, strong standard transmission. I have made a point to replace the valve cover gasket, the chain tensioner and the intake manifold gasket within the first year of owning the car. I get regular oil changes every 3,000 miles. There was oil leaking from both the valve cover and the intake manifold, so it had to be done...The fuel injectors were also cleaned at a mechanics.  

Upon removing the plastic intake manifold to replace the gasket, I was greeted with what I believe is engine sludge on both sides... It is present both within the plastic manifold and more when looking directly into the engine (like carbon mixed with engine oil) but the tops of the valves do not have this same build up (thank goodness). 

After some digging online, I am thinking this was all due to a failed PCV valve. I have a new valve and hose coming soon since there is oil and liquid gunk throughout the hose itself. I have no check engine lights on though... How can I clean off this gunk? Is there a cleaner that can be used to clear out the inside of the plastic intake manifold? Should I even risk cleaning the gunk within the engine, where it leads to the tops of the valves? Or should I get in there with a long tool and simply scrape the gunk out?

 

image gallery (5 more photos):

https://postimg.cc/gallery/VkQ8BPS

6 Answers
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Posted by: @devin8778

Odd question. I have better pictures of exactly what I mean, but I am unsure how to share.

it's covered in the "READ THIS FIRST" topic right at the top of the main page.

 

Posted by: @devin8778

I get regular oil changes every 3,000 miles.

That's very diligent of you, but probably overkill.

Posted by: @devin8778

Is there a cleaner that can be used to clear out the inside of the plastic intake manifold?

Yes. It's called parts cleaner.

Posted by: @devin8778

Should I even risk cleaning the gunk within the engine, where it leads to the tops of the valves?

I would. Seems wrong to put it back.

Or should I get in there with a long tool and simply scrape the gunk out?

Yep. Mechanical removal is a good 1st cleaning phase.

 

Here is a picture of one of the intake ports that is basically the same throughout the other 3 ports to share what I am dealing with.

Ahh, the picture isn't loading on my end, so here is a link to all the pictures I took. Hopefully this one works. Please let me know what tools or cleaners you would recommend for this specific job.

https://postimg.cc/gallery/VkQ8BPS

Mind sharing the image again, maybe another way?

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Posted by: @devin8778

Just in case they did not show up from the other link, here they are.

It should not be that difficult.

I am not familiar with imgur.com and usually use imgbox.com. No account is needed. Upload the image file or files. They ask a few stupid questions about content. I don't bother creating a gallery. Click on the uploaded image to bring it up in your browser. Copy the image URL and post it here. The image will display inline in your post. Here's an example of what you should see here (in this case an OBD1 scan tool) if done correctly:

The companion site sendvid.com can be used in a similar manner to upload videos if you don't have a Google account to upload to youtube.

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Now that's a dirty engine. I would get in there with an old toothbrush and some brake cleaner and go to town.

@MountainManJoe, will do! Its about time I get back in there. I have been wondering why my fuel trims have been abnormal as of late, and I think this job will be my next!

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Scotty answered at 4:59

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Normally I’d say to use some Carb cleaner. But that is for metal parts. I’m not sure if it is okay to use on plastic. 

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Go to imgur.com, load the pictures, copy and paste the url in your next post.

Just in case they did not show up from the other link, here they are.

https://devashland6792.imgur.com/all/?third_party=1

Wrong!

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