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2000 buick century Lx9 swap


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hey i have a 2000 buick century original 3100 v6 then i swapped to 3400 v6 from impala now im going to swap a 3500 v6 Lx9 non vvt from a 2005 malibu now im nt new to engine swaps at all but my question is im nt understanding this "external crank trigger" why cant i swap in block crank sensor from my 3400 into the 3500 im talking bout the one for the coils and use my crank pully onto the 3500 n put my other crank sensor tht goes behind the pully im going to use my 3400 upper intake and coils please let me kn

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The LX9 uses both crank sensor and the pulley trigger. The difference between the 3400 and LX9 trigger is the number of pickups on the balancer. I am sure there is a way to adapt it.

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I used to b a 60* guy myself till i had a lil more experience with 3800s and realized i was working too hard lol. Anyway i dont any problems swapping over ur balancer and cps as long as tolerances are the same. I predict a crank relearn tho

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ya 3900 sound kool which i have nt drove one yet but i heard its sooo much work almost impossble to do tht swap and btw u probably figure it out im making a sleeper buick century with the 3400 i got and my freeflow exhuast which no cat or u-bend n a single in dual out muffler n short ram cold air intake n egr delete has help alot wit power i can floor it from a stop n burn rubber wit out brake stand lol but im nt talking v8 power jt more power than a normal 2000 buick would have lol

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ya 3900 sound kool which i have nt drove one yet but i heard its sooo much work almost impossble to do tht swap and btw u probably figure it out im making a sleeper buick century with the 3400 i got and my freeflow exhuast which no cat or u-bend n a single in dual out muffler n short ram cold air intake n egr delete has help alot wit power i can floor it from a stop n burn rubber wit out brake stand lol but im nt talking v8 power jt more power than a normal 2000 buick would have lol

 

If you get a non vvt 3900 its bout the same as swapping in a non vvt 3500

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ill stick to 3500 non vvt its jt easier for now n ill jt use my 3400 balancer pully n crank sensors to run the 3500 i dont see why i would have to use a external crank trigger anyway i jt use my pully n sensor from the 3400

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the ignition systems on a 3500 vs 3400 are very different, requiring the trigger wheel unless you brought the PCM over from the 3500 vehicle, which would open up a whole new set of problems.

 

short version is that the 3400 uses the same ICM/coils/etc that was introduced in ~1987 on the aluminum head 2.8 engines, the ICM reads a 7X crank sensor from the middle of the block and creates a 3X crank signal for the PCM. the 24X reluctor/sensor is located on the end of the crank and is only used by the PCM for low-RPM engine speed/position calculations and misfire detection. you can remove that entirely and the engine will run normally, you'll just get a SES light. remove the 7X reluctor/sensor and the engine will not fire.

 

the non-VVT 3500 uses something about halfway between what the gen 2/3 engines had and what the gen4(VVT 3500 and 3900) use, a single crank sensor in the middle of the block with something like a 24X reluctor(with cylinder-specific patterns) and a waste-spark ICM, but the ICM no longer performs ignition sequencing or has control of dwell time, relying upon the PCM to do that.

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ok i was courious will u call or text me 405-380-8748 its easier for me to talk on phone n soo i can pretty much nt worry bout the crack sensor behind pully but i need to worry bout the one in middle of block well cant i take the 3500 in block sensor out n put mine?

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if anyone is going to be talking on a phone, it won't be me, far too much hearing damage to not turn a 5 minute conversation into 30 minutes of needing things repeated.

 

the sensor isn't the biggest problem(but you would need a 3400 style sensor as well), the big issue is the reluctor wheel, which is press-fit onto the crank. there is a replacement reluctor wheel that can be put on in place of it, or you can use an external trigger.

 

http://www.britishcarconversions.com/shop/all/crank-trigger-kit-internal-detail

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the ignition systems on a 3500 vs 3400 are very different, requiring the trigger wheel unless you brought the PCM over from the 3500 vehicle, which would open up a whole new set of problems.

 

short version is that the 3400 uses the same ICM/coils/etc that was introduced in ~1987 on the aluminum head 2.8 engines, the ICM reads a 7X crank sensor from the middle of the block and creates a 3X crank signal for the PCM. the 24X reluctor/sensor is located on the end of the crank and is only used by the PCM for low-RPM engine speed/position calculations and misfire detection. you can remove that entirely and the engine will run normally, you'll just get a SES light. remove the 7X reluctor/sensor and the engine will not fire.

 

the non-VVT 3500 uses something about halfway between what the gen 2/3 engines had and what the gen4(VVT 3500 and 3900) use, a single crank sensor in the middle of the block with something like a 24X reluctor(with cylinder-specific patterns) and a waste-spark ICM, but the ICM no longer performs ignition sequencing or has control of dwell time, relying upon the PCM to do that.

 

 

Thanks for this info!! I don't know how many sites I've combed through looking for this very explanation. All I ever heard was "you need the crank trigger from Milzy." This sums it up very succinctly!

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I wouldn't buy anything from Milzy.

 

Bad rep, I assume? I've never purchased anything from him before...

 

Too bad WOT-TECH doesn't have one available - I'd recommend them without hesitation!!! I bought a 3500 UIM throttle body adapter and fuel rail clip from them a few years ago...

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