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LQ4 teardown and build

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Old Jul 24, 2013 | 05:32 PM
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Owen23's Avatar
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Default LQ4 teardown and build

So I'm attempting to build a twin turbo LQ4 build. I have broken down the 2001 GMC Sierra LQ4 w/ aluminum heads (See Pictures). I am a bit broken up about what I am going to do piston wise. Any set of forged piston heads are costing me around $450 and piston rods $450... I was hoping for a much less expensive forged setup. I am looking at 600-800 crank horse power.

Any assistance would be greatly appreciated!!



Well I can't figure out how to post images in here...

Last edited by Owen23; Jul 24, 2013 at 05:36 PM. Reason: porblems
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Old Jul 24, 2013 | 05:37 PM
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You don't need forged anything for that. If its apart put new bearings and gap the rings appropriately. Measure, make sure clearence is with in specification and boost it
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Old Jul 24, 2013 | 05:39 PM
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I am thinking you might have unrealistic expectations if you think $900 is expensive for a forged setup.
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Old Jul 24, 2013 | 07:01 PM
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^^^^ but you don't need forged anything for your power goal boosted.
$6-$800 will be fine on stock crank, rods and pistons. If you put it togather correctly/minimal effort with bearings and gap the rings.
Many cars with that power rating (lq4) and stock short &heads with supporting valve train.
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Old Jul 24, 2013 | 07:23 PM
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Gap the rings, replace worn bearings and put in some ARP rod bolts and you'll be good to go. Check out the FI section on here and do a little bit of research before you begin doing anything. All your questions can be answered on this site if you search.
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