02-05 Engine into 06? I6 4.2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > The 02-09 "How-To" and DIY Section

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Old 03-16-2019, 02:40 AM
Inkcmob Inkcmob is offline
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02-05 Engine into 06? I6 4.2

Okay, I’ve combed through this and other forum threads, and I have found some conflicting information on this subject, though some of it has been incredibly helpful. I have an 06 engine taken out of the game via a rod punching through the side of the block, and an older model year engine that does not have the same problems sitting in the shop.

Do 02-07 LL8’s run the same 7x reluctor wheel or do they in fact change in ‘06? I’ve found conflicting info on this.

It seems the 06 cylinder head should bolt to the older model year block, which would forego the obvious harness complications.

If the reluctor wheel did change in theory could I just slap the 06 crank into the older block to remedy said issue?

Thanks for the help, to be honest these all may be more theory based than anything, seems like it’s less headache to just scoop an 06 dropout to put in, but looking into it I’m truly curious. Chances are the crank in the ventilated block is screwed anyway. And if the older engine hangs out I’m gonna have to turbo it or something ridiculous and grab a first gen to toss it in 🙄
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Old 03-17-2019, 12:35 PM
fotoryder fotoryder is offline
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2007 GMC Envoy SLE
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Fist thing I'd do is talk to the DMV or car registration folks in your area to make sure you can drop an older engine into a newer car and pass air quality inspection.
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