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What''s going on here? (pics)


beren

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I just got a L28 from a 79 280zx to swap into my Black Pearl. The engine in my 280 is not original and needs a rebuild, so I picked up this engine for $300, and will rebuild the other engine as time permits.

 

Here's my issue. When we pulled the exhaust manifold off the "new" engine to replace the intake/exhaust manifold gasket, the lining of cylinder #3's exhaust port was white! (The pictures only show cylinders 2-5)

 

Pic 1

small_01.jpg

 

Pic 2

small_02.jpg

 

 

Does this indicate that this cylinder was running lean? What's going on here? My brother-in-law was concerned when he saw it and said he wouldn't trust the engine. Any ideas?

 

Thanks in advance...

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I've never seen that before... it's possible it could've been starved for fuel and running lean... I'd do a compression test for sure, and maybe replace that injector.

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+ it is the 'evil' exhaust liner, i have seen this on blownheadgaskets ( or leaking) before, or it could be really lean like i once saw on a Turbo exhasutmanifold (that xandar had) it was also allmost platinum white.

 

 

On teh other hand, that engine is not the Original engine for a 79, those to my knowledge only came with the n42/n42 combo, this is a n47 witch is 81/82 and not that common ( at least not the longest used)

 

But i would do a compression test, or better take teh head of, check it out, and maybe swap for a n42 ( since the liners are havely debated) or rebuilt the head. cause this looks like this cant have been running without doing some damge

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