Series III Swap ? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-08-2009, 07:04 PM   #1
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Default Series III Swap ?

Help ! My 95'* engine just let go. I have found a used engine out of a 02 Lesabre ( series III ) with 58k on it for a good deal. Anyone have any info on this type of swap ??? Any and all feedback would be appreciated !!! Thanks -
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Old 01-08-2009, 09:00 PM   #2
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the 02 lesaber didnt have the series 2 that is only in the 04+

and the you will need to swap injectors, and get a TB adapter if you plan on using the upper intake
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Old 01-12-2009, 06:18 PM   #3
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I plan on using the block & the heads and swapping everything else over. Should I be ok going this route ???
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Old 01-19-2009, 03:11 PM   #4
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Someone ...??? Anyone ...??? any info please !!!
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Old 01-19-2009, 03:23 PM   #5
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Billboost should have a good answer for this. He should show up soon.
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Old 01-19-2009, 06:04 PM   #6
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yes the blocks and the heads are the same. you will be fine. You have to use your orignal motor mounts
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Old 01-28-2009, 03:57 PM   #7
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Ok - Im about to pull the trigger and do the swap. Can I use the lower intake manifold that is on the Series III engine ? I will swap my plenum all everything else ( oil pan, exhaust manifolds, etc. ) over but Im just making sure on the lower intake. thank you -
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Old 01-28-2009, 04:59 PM   #8
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the lower intake is the same
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Old 02-05-2009, 02:44 PM   #9
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First of all - Thank you for all the help !!! I appreciate it. So as I type this , we are in the middle of doind the swap. The yard(*) that I spoke with said I need to swap the oil pan / pick up tube & harmonic balancer. My tech believes I can use the harmonic balancer off of the 03 Lesabre engine ( series 3 ) - **** anyone know if this is ok or do I indeed need to swap the harmonic balancer over ??? ***** thanks again -
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Old 02-05-2009, 03:08 PM   #10
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The oil pan..OMG save the 03 pan and pick up tube. Actually..take a picture. I'm almost positive you can keep the aluminum pan and pick up right on that motor.

Balancer should be fine. Check the flywheels closely. Some of the converters were smaller and you don't want to use the wrong flywheel bolt holes.
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