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 Read these heads

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lamune

lamune

Posts : 688
Join date : 2014-05-09
Location : Seattle

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PostSubject: Read these heads   Read these heads Icon_minitimeFri Mar 29, 2019 6:57 pm

I pulled the heads off the original motor in my wagon - 170k miles on it.

For those of you who know how to read the condition of these and make a guess at how this motor has been running, I'm curious as to what your thoughts are.

These heads are not being rebuilt or reused, just to be clear.

Odd bank:
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Even bank:
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Fred Kiehl

Fred Kiehl

Posts : 5287
Join date : 2009-11-13
Age : 70
Location : Largo, FL 33774

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PostSubject: Re: Read these heads   Read these heads Icon_minitimeFri Mar 29, 2019 8:49 pm

Looks like you were running a little lean on the rear cylinders, or rich on the fronts.
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lamune

lamune

Posts : 688
Join date : 2014-05-09
Location : Seattle

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PostSubject: Re: Read these heads   Read these heads Icon_minitimeFri Mar 29, 2019 9:22 pm

Fred - I thought the black intakes looked more like I would expect. Might there have been a vacuum leak in the back of the intake manifold? That's the only thing I can think of at the moment that would explain the back cylinders running lean.
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Fred Kiehl

Fred Kiehl

Posts : 5287
Join date : 2009-11-13
Age : 70
Location : Largo, FL 33774

Read these heads Empty
PostSubject: Re: Read these heads   Read these heads Icon_minitimeFri Mar 29, 2019 10:30 pm

With MPFI it could be the injectors as well, but it is unusual for both sides to have the same symptoms. There could have been a vacuum leak as well. You will never know.

Maybe the heads are warped. Clean them and put them on a flat plate to check for warping.

The plugs all look good, so you may have temp issues.
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PostSubject: Re: Read these heads   Read these heads Icon_minitime

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