Resolved 2g harmonic damper on 1g

[Gonza97]

Greetings group, My 1G DSM harmonic damper has snapped, and I'm planning to make a trip in 2 weeks.
I'm left with either going without the damper apparently, or while searching in my place I can only find 2Gs

So:
Can I use a 2G one instead? Or going without the damper in the pulley or is it going to give me future mechanical issues?

And then for mostly stock applications can I use ATI or Fluidamper without issues?


Thanks

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[97egl]

To use the ATI pulley you have to replace the timing belt cog/sprocket on the crank with the one that comes with the pulley. The fluidamper does not require this which is why I went with a fluidamper when I got one years ago. They will work fine on a stock engine.

I'm 99% sure the 2g is interchangeable with the 1g. The pulley sizes may be slightly different due to using a different alternator and a/c compressor but someone with more knowlege should be able to chime in. Otherwise I'll try to compare 2 of them when I get home. I have a feeling I've tossed a 2g pulley on a 1g before and never even noticed.

Other thing is when guys put 6 bolt blocks in 2g cars I've never seen the damper mentioned which leads me to believe they can be interchanged without issue

 

[19Eclipse90]

They are interchangeable - not identical - but one can be used in place of the other.

Supposedly, the 2G pulley is heavier and more likely to separate, compared to a 1G pulley. I personally have never looked that closely at them.

 

[curt-s]

They are interchangeable - not identical - but one can be used in place of the other.

Supposedly, the 2G pulley is heavier and more likely to separate, compared to a 1G pulley. I personally have never looked that closely at them.

More likely? Eep!

STM now lists a single part for use across all DSMs (and earlier Evos) -- the 2G p/n

Mitsubishi OEM Crank Pulley for DSM/Evo 1-3 (MD377604)

Genuine OEM Mitsubishi factory replacement 4G63 crankshaft pulley fits all 1G/2G AWD/FWD 6B/7B DSM and Evo 1/2/3 models.

stmtuned.com

Guess that's what we got now if we don't go ATI/Fluidampr

 

[curt-s]

Since I have both, did some checking

1G on left, both OEM

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So I think we can say the pulley diameters are the same but the 2G part weighs nearly 20% more.

It also has double rubber so it can probably be estimated to provide improved harmonics damping at the expense of increased separation risk.
However, if you keep an eye on it, these probably outlive most of our use cases anyway.

The question then becomes how well balanced are they