LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

overhanging valve

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Old Jan 7, 2009 | 04:56 PM
  #1  
01pewterz's Avatar
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From: Mabank, Texas
overhanging valve

I bought a set of low mileage heads that have been worked and was noticing that the intake valve overhangs the deck. Is this a problem? I don't really know much about heads and have never looked at any that were p/p these have 2.02 1.54 valves.
Old Jan 7, 2009 | 07:55 PM
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DugRat's Avatar
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Shouldn't be a problem, mine were like that when they were stock.
Old Jan 7, 2009 | 09:58 PM
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01pewterz's Avatar
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Originally Posted by DugRat
Shouldn't be a problem, mine were like that when they were stock.
thats what I was hoping to hear, I haven't pulled my other heads off yet to compare them (waiting on gaskets) but was hoping to be about the same, the only thing that bothers me is I don't know how much, if any, my block has been decked.
Old Jan 8, 2009 | 04:51 PM
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From: PORTLAND, OR, MULTNOMAH
Those are pretty large intake valves. Obviously the valve ports weren't relieved to accommodate the valves. The only difference it would make is that you are not getting any value for the larger valves, i.e. the larger valves are shrouding the valve seats and you are not getting maximum flow from the pockets to the cylinders. Probably reducing the size of the combustion chambers too because the protrusion of the valve is taking up space. JMHO

Probably a comon oversight when some are willing to pay for larger valves but pay no heed to sizing the pockets to acccommodate the oversized valves.
Old Jan 11, 2009 | 12:58 PM
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that is how my lt4's were. can't remember what the lt1's looked like.. i know they had to remove all the valves on my lt4 heads to shave them back in the day..
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