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Old 04-30-2012, 01:37 PM   #20
usmcchevy
Has more rust than truck...
 
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Join Date: Apr 2005
Location: Ivanhoe, MN
Posts: 2,421
Re: L59 fuel question

Quote:
Originally Posted by gringoloco View Post
Check the head gasket tab to verify displacement. It will be stamped with 4.8, 5.3, 6.0...
Quote:
Originally Posted by osaltyone View Post
What is the easiest way to tell that I don't have a 4.8? I can remove the heads if I don't have to. Not something I have done before, but can if I need to.

There is a little tab sticking off the head gasket below the exhaust ports that will be stamped with displacement. Take a wire brush to it and hopefully you can read it.
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