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10-16-2016, 09:24 AM
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#1 |
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Registered User
Join Date: Sep 2013
Location: Andover
Posts: 157
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Lq4/lq9 engine question
Somewhere I read you must use a 2003 and up ls engine because of some differences with mounting points with the bell housing or somethkng. I can't seam to find the article soon ask you this. Is there a year range I should stay away for when it comes to an lq4 or lq9 swap? Thanks guys.
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10-16-2016, 09:53 AM
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#2 |
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Addicted to Rust
 
Join Date: Dec 2009
Location: Abbeville SC
Posts: 1,030
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Re: Lq4/lq9 engine question
99-00 6.0 have an extended crankshaft so mixing and matching trans is problematic, But if you use all of the factory stuff its good to go. And they have less desirable cylinder heads.
__________________
Current trucks: (48 GMC100 320 inliner) Gone (48 Suburban in pieces) Sold 87 GMC CCSB 5.3 4l60E Daily Driver ECTA National record holder XO/PP We never really grow up, we just learn how to act in public. |
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10-16-2016, 11:21 AM
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#3 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Lq4/lq9 engine question
They all will bolt up. GM only uses 1 bolt pattern on ALL LS motors with the exception of the LS4, which is tranversly mounted.
The 99-2000 have the built in crank spacer, which is fine if your using a 4l80e. The 99-2000 also have iron heads, which work, but are the least "performance oriented" heads that exist for the engines. There are also some wiring harness differences on the 99-01 engines if you source them from an HD/fleet truck vs a regular donor.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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10-17-2016, 12:48 PM
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#4 |
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Registered User
Join Date: Sep 2008
Location: Paragould,AR
Posts: 76
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Re: Lq4/lq9 engine question
Brew can you explain some of the differences in harness?I may have an odd ball so I would like to know how to identify what I have.Thank
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10-17-2016, 03:05 PM
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#5 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Lq4/lq9 engine question
The engines out of medium duty trucks had different emissions control stuff and longer wiring runs. Some also have a ton of extra body-side wiring that the regular trucks wouldn't have.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING |
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