Jump to content

Replacing the intake gasket


Recommended Posts

Anybody know why the #2 intake port would look like it has never been used while the others look like they have 150,000mi on them? I am replacing the intake gasket because of a vacuum leak and noticed this. The cylinder has been misfiring. There is no coolant in the oil. I'm not sure what the clean port is indicating. 1999 Mazda protégé 1.8L.

Mazda intake gasket.jpg

Link to comment
Share on other sites

The black material is from the crankcase which comes through the PCV system. I cannot tell from your picture but most likely because the fuel injector is spraying into the area and cleaning away the deposits from the crankcase. The other cylinders the fuel injectors may not be spraying directly into the head. With the fuel injector spraying into the valve area it is amazing how clean they stay.

Link to comment
Share on other sites

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.   Paste as plain text instead

  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...