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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Mike Phillips on April 15, 2009, 10:47:42 pm

Title: Diagnos what's wrong from this picture... (Head Problem)
Post by: Mike Phillips on April 15, 2009, 10:47:42 pm

Diagnose what's wrong from this picture... (Head Problem)

This is the exhaust manifold off the passenger side of the engine.  Notice the grayish color of the tube for #3 cylinder.

(http://www.showcargarage.com/gallery/files/1/BadValvem.jpg)


 ???

Title: Re: Diagnos what's wrong from this picture... (Head Problem)
Post by: choptop on April 15, 2009, 11:35:10 pm

Burnin a little oil maybe??? Valve guides?

Title: Re: Diagnos what's wrong from this picture... (Head Problem)
Post by: Lt.Del on April 16, 2009, 10:01:28 am

how's that spark plug look?  oily and black?

Title: Re: Diagnos what's wrong from this picture... (Head Problem)
Post by: VileZambonie on April 16, 2009, 10:13:10 am

That means nothing. You can't read a.i.r. tubes to determine internal engine problems as it's post combustion. If that tube isn't flowing as much air it won't look as clean as the others. Read your plugs instead.

Title: Re: Diagnos what's wrong from this picture... (Head Problem)
Post by: eventhorizon66 on April 16, 2009, 10:16:32 am

LOL.  Reading air injection tubes.  That's a new one. :D

Title: Re: Diagnos what's wrong from this picture... (Head Problem)
Post by: Mike Phillips on April 16, 2009, 12:03:31 pm

I actually haven't removed the plugs yet but I will.

Just to note, 7 of the tubes were for the most part white, that's why this gray one stood out like a sore thumb.

I'll pull the plugs this weekend and do a compression check.

:)