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Old 06-11-2020, 08:31 PM   #1
dag19
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Join Date: Apr 2010
Location: Austin TX
Posts: 135
Question 2003 LQ4 Cam Housing 1st or 2nd Design

I've got a 2003 LQ4 6 liter. Just so happens 2003 is when there is a 1st Series Design and a 2nd Series Design for the cam housings. How would I go about identifying which design I have? I am trying to order a new cam and bearings but want to make sure I get the right parts.


Cam Housing Bore Diameter
Bore 1/5 = 2.326, Bore 2/4 = 2.317, Bore 3 = 2.307 (1999-2003 1st design)

Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307 (2003- 2007 2nd design)
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