05-16-2009, 09:38 AM
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#1
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GX Member
Join Date: May 2009
Location: MD
Posts: 4
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99 Alero 3400 engine swap
Hi, I have an 1999 Alero with a bad engine (mechanic said probably a real bad piston ring) as a result of LIM coolant leak. I have located a 3.4 engine but it's from a 2000 Alero.
Someone told me I should swap with the same year but the heads seem to be the same. What kind of problem am I going to run into if I do that?
I need to put another engine or sell the car as is. It's taking my space. It's a nice ahndling car and I'd love to fix it. Thank you.
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05-16-2009, 10:42 AM
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#2
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GX Member
Join Date: Jan 2008
Location: montreal
Posts: 197
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go with it cause its the same engine,and when youll be ready to swap,just double check that everything is the same,if not,just swap the piece(s) in question!
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05-16-2009, 12:17 PM
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#3
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Now a Ford Traitor.
Join Date: Mar 2008
Location: Greenland
Posts: 6,996
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should bolt right up
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05-16-2009, 01:24 PM
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#4
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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You have to switch the injectors and FPR. You can just do the whole rail assembled if it's not damaged.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-16-2009, 02:20 PM
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#5
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GX Member
Join Date: Jan 2008
Location: montreal
Posts: 197
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Quote:
Originally Posted by Cliff8928
You have to switch the injectors and FPR. You can just do the whole rail assembled if it's not damaged.
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good to know!!
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05-17-2009, 02:29 PM
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#6
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GX Member
Join Date: May 2009
Location: MD
Posts: 4
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Quote:
Originally Posted by Cliff8928
You have to switch the injectors and FPR. You can just do the whole rail assembled if it's not damaged.
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Nice. you must know these engines very well. 1997-2002 have the same heads. So does that also mean all these years have the same 3.4L?
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05-17-2009, 10:20 PM
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#7
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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The intakes are different, but compatible. Use the newer ones for best performance.
The only real compatibility difference is the injectors on the '99 (and older) 3400s use the original Multec injectors running at ~41-47 PSI and the '00+ runs the newer Multec II injectors running at ~52-59 PSI.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-17-2009, 10:32 PM
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#8
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GLS member
Join Date: Nov 2007
Location: Fort Knox area, KY
Posts: 2,120
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I would not change the injectors and FPR, the PCM is calibrated for the '99 values, and the '99 fuel pump flow capability may be different.
It should work good enough either way, though.
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05-17-2009, 10:52 PM
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#9
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Use the original Injectors and FPR but the newer manifolds is what I was getting at.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-18-2009, 03:04 PM
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#10
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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Just curious as to how many mile before the LIMG problem.
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05-18-2009, 04:37 PM
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#11
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Also, keep in mind that the EGR valve changed from 1999 to 2000 - '99 was a horizontal mount and 2000+ is a vertical mount. So if you are intending to use the 2000 UIM, you'll need the EGR valve too. Pretty sure the wiring harness is the same and the PCM won't care.
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05-18-2009, 05:45 PM
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#12
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GX Member
Join Date: May 2009
Location: MD
Posts: 4
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Quote:
Originally Posted by zzyzzx
Just curious as to how many mile before the LIMG problem.
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Alero has 210k miles. I just bought the car and was told it had brown head gasket. Mechanic said picton rings are bad and it locks up sometimes. So I'm putting in a new motor.
I don't know the history of the motor...
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05-18-2009, 05:55 PM
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#13
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GX Member
Join Date: May 2009
Location: MD
Posts: 4
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Quote:
Originally Posted by mfuller
Also, keep in mind that the EGR valve changed from 1999 to 2000 - '99 was a horizontal mount and 2000+ is a vertical mount. So if you are intending to use the 2000 UIM, you'll need the EGR valve too. Pretty sure the wiring harness is the same and the PCM won't care.
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The 2000 motor comes with the EGR valve. Hopefully the flex pipe and all tubes/wires will work with the new location.
From all the helpful replies, here's the summary:
- 2000 3.4 has updated intakes. But will work with my 1999 car. The updated is supposed to be better?
- EGR changed location and mount but hopefully all tubes/wires will work. Worst case I just switch to the old intake.
- I will need to use the injectors and FPR from old 1999 motor because the 2000 injectors and FPR have much higher rating.
- Someone told me to watch out for air pump in later models. Hopefully I'll be ok with the 2000 motor.
Thanks guys!
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05-19-2009, 12:35 PM
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#14
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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You'd know if you had the A.I.R. system. I'm sure there are some people which have some pics with and without on here.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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