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Old 02-01-2013, 09:06 PM   #1
87blackblazer
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LQ9 swap (w/ CA smog)

After some very helpful replies in a separate thread, I've decided to focus on the engine/trans at this point and work on the other stuff later. Pretty sure I want a 6.0L swap, but it has to pass CA smog. It seems that the LQ9/4L80E may be the best option b/c that combo came in a light duty truck (Silverado SS). Did the LQ4 come in any 1500 series trucks (not HD)? This is a requirement for the swap.

Anybody have any suggestions for shops to do the swap (I'd love to do it myself, but I'm in Japan and need the job completed by my return in July)?
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Old 02-01-2013, 09:44 PM
Posted in reply to 87blackblazer's post "LQ9 swap (w/ CA smog)"
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location in CA?

and you'll need a smog referee to go over the truck before he gives you a new smog sticker and makes it legal. With the swap, you need to retain all the new smog equipment from the engine and whatever came in the truck originally (aka: the same CAT found on the newer truck, smog pump, manifolds, egr, all that good stuff)
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Old 02-01-2013, 11:58 PM
Posted in reply to 87blackblazer's post "LQ9 swap (w/ CA smog)"
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The LQ9 came in the SS , the HD pick ups , escalade,and a few other high end suv's the. The LQ4 lower compression less HP 6.0 came in the non HD pickups and tahoe's
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Old 02-02-2013, 01:29 AM
Posted in reply to K85 Octane's post starting "location in CA? and you'll need a..."
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location in CA?
San Diego

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Originally Posted by supermotard750 View Post
The LQ9 came in the SS , the HD pick ups , escalade,and a few other high end suv's the. The LQ4 lower compression less HP 6.0 came in the non HD pickups and tahoe's
My understanding is that the LQ9 did not come in HD pickups - only SUVs and HO pickups. On the other hand, the LQ4 only came in SUVs and HD pickups - not LD pickups. To pass the referee inspection, the donor vehicle has to be LD.

Here's what I believe to be the applications of each engine, please tell me if I'm wrong (or interpreting it incorrectly):

LQ4
Chevrolet Express/GMC Savana
Chevrolet Silverado 2500 Pickup, 3500 Pickup, Crew Cab, and Chassis Cab/GMC Sierra 2500 HD Pickup and Crew Cab, C3, Denali, and 3500 Pickup and Chassis Cab, 1500HD Crew Cab
Chevrolet Suburban/GMC Yukon XL Denali
Hummer H2 SUT
GMC Yukon Denali

LQ9
2002-2006 Cadillac Escalade
2002-2006 Cadillac Escalade EXT
2003-2006 Cadillac Escalade ESV
2003-2007 Chevrolet Silverado SS
2004-2005 Chevrolet Silverado and GMC Sierra Vortec HO Edition Only
2006-2007 Chevrolet Silverado and GMC Sierra VortecMAX Option
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Old 02-05-2013, 05:30 AM
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Whats a LD? You can put any of those engines in so long as they pass the ref inspection and smog.
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Old 02-05-2013, 06:25 AM
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Whats a LD? You can put any of those engines in so long as they pass the ref inspection and smog.
The referee DOES NOT allow the use of heavy duty engines in light duty trucks.
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Old 02-05-2013, 07:00 AM
Posted in reply to 4X4HIGH's post starting "The referee DOES NOT allow the use of..."
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All of these engines mentioned above are exhaust controlled. What they are saying is you can't put a carbed 572 or a detroit671 in a smoged controlled vehicle.
\If he has a commercial reg on that K-5 in the eyes of the state, thats a pick-up.
I've been down this road a few times and as long as you understand the rules,you'll never have a problem.
Plus, when you start dealing with these "refs" ,you'll realize your not working with a mind thats capable of spliting the atom.
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Old 02-05-2013, 09:30 AM
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my understanding - not from california, never been, never will - is that you ain't allowed to put a larger engine then the vehicle came from with factory, because the larger engine increases the smog... unless your blazer came from the factory with a 400sbc (which would be 6.6 liters) there is no way you could put a 6.0 in it and pass emissions. EVEN if a 2002 lq4 or lq9 produces MUCH less emissions then an 87 350sbc.
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Old 02-05-2013, 10:32 AM
Posted in reply to drew4x4's post starting "my understanding - not from california,..."
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I've installed 350's in trucks that have had 305 with no troubles.
The cubic inch difference that this guys' dealing with is a non issue.
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Old 02-05-2013, 11:21 AM
Posted in reply to drew4x4's post starting "my understanding - not from california,..."
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[quote]
Quote:
Originally Posted by buefchris View Post
All of these engines mentioned above are exhaust controlled. What they are saying is you can't put a carbed 572 or a detroit671 in a smoged controlled vehicle.
\If he has a commercial reg on that K-5 in the eyes of the state, thats a pick-up.
I've been down this road a few times and as long as you understand the rules,you'll never have a problem.
Plus, when you start dealing with these "refs" ,you'll realize your not working with a mind thats capable of spliting the atom.
Blazers are registered as a passenger vehicle (usually as a station wagon).

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Originally Posted by drew4x4 View Post
my understanding - not from california, never been, never will - is that you ain't allowed to put a larger engine then the vehicle came from with factory, because the larger engine increases the smog... unless your blazer came from the factory with a 400sbc (which would be 6.6 liters) there is no way you could put a 6.0 in it and pass emissions. EVEN if a 2002 lq4 or lq9 produces MUCH less emissions then an 87 350sbc.
In California you are allowed to swap engines as long as it is the same cubic inch size or LARGER and you must use ALL of the emissions equipment that was on the donor engine.
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