Generation III Internal Engine 1997-2006 LS1 | LS6
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Year of block?

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Old May 7, 2016 | 09:42 PM
  #1  
chevyss2008's Avatar
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Default Year of block?

Today I changed the oil in the 2000 WS6 I bought not long ago..I bought a Fram PH3065 and it would not fit....so I changed it for AC Delco PF46 and it would not fit either...So I pulled the old filter out of the oil dump and it was AC Delco PF48E..I thought those fit on later model LS1? All the books called for PF46...
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Old May 7, 2016 | 10:15 PM
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A PF48 would have the larger Gen IV thread size... however, all this really tells you is that you have a Gen IV oil pan (since the filter threads to the pan and not the block).
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Old May 7, 2016 | 10:51 PM
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Its def a Gen IV pan...Im going to try to get the casting # off the block tomorrow
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Old May 9, 2016 | 11:40 AM
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The LS2/3 oil pans fit into our 4th gen f bodies??
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Old May 9, 2016 | 12:25 PM
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Mine def has the larger thread size, as the PF48E will fit, and the PF46 will now
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