2004 3.4L GM Deck Height

AllGM · #1 10-15-2015, 02:27 PM

I think I may have a problem. Head gasket blew. When taking off the heads a noticed severe (deep) machining marks on the decks (probably there since engine was built) and some corrosion around a water passage. Took the engine to a local engine shop. He said he could take some off the top. I said ok. Now during reassembly the pistons stick out above the deck at TDC. is some protrusion as designed? Piston travels .025" above deck now.

maxwedge · #2 10-15-2015, 06:47 PM

How much did he take off the deck, what is the stock deck height, machinist should have this info and acted accordingly!

AllGM · #3 10-15-2015, 10:38 PM

He said just .006" was removed, and it is normal for the pistons on this engine to protrude from the top of the deck. True??

maxwedge · #4 10-16-2015, 08:37 PM

Don't have the blue print specs, but .006 shouldn't be an issue.

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