34400swap for a 3100 questions??

[hotdogger]

I have an 02 Buick Rendevous CXL with a bad 3400.
I have a 3100 out of an 03 malibu( told to me by seller)
1.How do I confirm what the 3100 is out of?
2. Could a swap be done easy?
3. What would I have to change for the swap?
4. Being this Rendevous is AWD does the engine still come out the bottom?

This is my first post and would appreciate any help. Thanks in advance!

[bszopi]

Not really sure if you can confirm what it is out of easily.
1. If the plenum looks the same as your, with the exception of it saying 3100, then it is at least a 2000+ 3100.
2. The swap would be super simple as they are basically identical engines, except for the bore.
3. Shouldn't have to really change anything. You'd have to retain your exhaust manifolds most likely, and you could swap the 3400 plenum over to the 3100 so it would still look the same. TB might also have to remain from the Rendezvous, as it might have a different linkage.
4. I'll have to look at mine (I also own a 2002 Rendezvous), but it should be able to come out the top or bottom. The way the AWD is setup, it won't interfere with the engine as at.

Welcome!

[IsaacHayes]

There should be a casting on the LIM which will give you a rough idea of the year of the engine... should say 00, 02, 03, etc.

[no_doz]

yea this swap should be just as easy as sticking in a 3400 from the exact same year, considering the engines are virtually identical like brad (bszopi) said.

[hotdogger]

Not really sure if you can confirm what it is out of easily.
1. If the plenum looks the same as your, with the exception of it saying 3100, then it is at least a 2000+ 3100.
2. The swap would be super simple as they are basically identical engines, except for the bore.
3. Shouldn't have to really change anything. You'd have to retain your exhaust manifolds most likely, and you could swap the 3400 plenum over to the 3100 so it would still look the same. TB might also have to remain from the Rendezvous, as it might have a different linkage.
4. I'll have to look at mine (I also own a 2002 Rendezvous), but it should be able to come out the top or bottom. The way the AWD is setup, it won't interfere with the engine as at.

Welcome!

Thanks.
I haven't looked under the Rendevous to get and idea about the awd stuff yet.
I think I should replace the intake gasket before installing, but seeing it is supposely low milage it makes me think twice.
The guy I bought the engine from is a local guy who does a lot of engine swaps and buys spare motors from wrecks. He has a nice shop behind his house and does lots of drag racin and seems to be real particular
This one he said had 32,000 miles on the odometer when pulled and he heard it run before pulling.
Got it for $800 which after checking and making lots of calls I thought it was a deal.
Thought once I get the motor pulled from the Rendevous I would do a side by side comparison to see whats different.

Again thanks for the reply!

[hotdogger]

There should be a casting on the LIM which will give you a rough idea of the year of the engine... should say 00, 02, 03, etc.

Well you got me.
Looked on WIKI for LIM.
Got:Lim (musical instrument), a Bhutanese flute. LOL

[pocket-rocket]

If it's anything like my sisters Aztek w/ Versatrak, it's a normal FWD configuration with the shaft for the rear coming off of the diff end of the tranny. With that said, I would imagine if there is enough clearance, out the top would be the easiest vs. out the bottom.

[asylummotorsports]

LIM = Lower Intake Manifold

$800 sounds like alot for a 3100 but good luck with it. Should be a pretty staright forward install.

[hotdogger]

Well finally got around to pulling the engine out. Had to remove oil filter and base and rear manifold to get out the top. If front opening was 4 inches wider the thing would have come out with no stripping.
Going to do a side by side today to look at differences.
My mechanic/ auto parts seller says the computers are different in the book.
So switch over of parts like cam sensor and injectors should be considered.

[hotdogger]

Looks like I have a problem.
Cam sensors are different.
Engine I took out:
3400 cam has a big square lobe. Cam sensor has pig tale with three wires, red black and green and a plug.
Engine I want to put in:
3100, cam is an ecentric on it? ( I guess thats what you would call it)
Starts at a spot then comes around to a lower spot forming a ledge.

Wiring to plug on loom has red/with white tracer, Black9 middle), Gray with white tracer. Plug recepticale on cam is different than one on loom for the vehicle that had the 3400.

Seems to me with the 3400 cam the computer would read an instant value when it passes the high spot. While the 3100 sensor would produce different value readings to the computer.

Parts man tell me the computers are different part numbers.


I am stuck as to what to do about the cam sensors.






















I don't know what to do.

[Weatheralls Auto]

I believe,though, the cam sensor and cam is different the signal the pcm receives is the same.

I think if you rewire the old sensor connector(3400) to the new sensor(3100) it will work.

I am not 100% sure on this, maybe someone else can chime in.

[hotdogger]

I believe,though, the cam sensor and cam is different the signal the pcm receives is the same.

I think if you rewire the old sensor connector(3400) to the new sensor(3100) it will work.

I am not 100% sure on this, maybe someone else can chime in.

If both sensors work the same then:
Looks like the 3400 sensor will slip in the 3100 block , no problems.
They both seem to have close to the same length and angle of plastic on the end loook the same.
Just don't want to make a mistake and stick it in and engine won't run.

http://i46.tinypic.com/10mpwls_th.jpg

[IsaacHayes]

Use whichever cam sensor, with whichever cam. It all will work. Whatever wires in easiest.

[bszopi]

http://60degreev6.com/Stock_Camshafts

[hotdogger]

http://60degreev6.com/Stock_Camshafts

The lobe profile never changed for the Gen 3 engines, but there were changes made between years on the cam trigger. Why GM did this, we will never know. But from what we know from experience, the signal created by the cam position sensor (and thus sent to the PCM) is the same for all of the designs, so it is best to match the cam position sensor to the cam trigger of your particular cam.

1994-1999 : cam sync ring was a "missing tooth" design, requiring cam position sensor AC Delco PN 213-294
2000-2002 : cam sync ring was a "single tooth" design, requiring cam position sensor AC Delco PN 213-937
2003-present : cam sync ring is a 50/50 pattern of raised and lowered semi circles, requiring cam position sensor AC Delco PN 213-1533

(L to R) : 03-Present, 00-02, 94-99

Thanks!!!!!

So it looks like I should use the cam censor that was in the 03/ 3100 that I am putting in for the bad 02/3400 I took out.

I just don't know about the wiring.

Wires on the 02/ 3400 loom have red, green, brown.


Wires from the 3100 loom had gray/white tracer, black, red/ white tracer.