Mild 6.0L Build Suggestions?

[iamdub]

The one on my Buick was really bad, and you couldn't feel a thing haha. It drove smooth a silk.

Did you replace it with a factory one? or aftermarket style encapsulated? I'm not sure if the encapsulated is necessary unless you do higher RPM where you can grenade things no?

I'm looking at reviews for the stock ones and see there's some pretty bad Chinese knock offs that come apart on people. There are bad reviews of even the doorman. Trying to find AC Delco but not seeing it.

Replaced with factory AC Delco one. I was fortunate enough to have bought all of my factory parts around the end of 2019 in preparation for my build, so I missed the COVID shutdowns and shortages. IMO, the factory one is perfectly fine. At our modification levels, I'd only get a performance aftermarket one out of sheer availability. My shift point(s) and red line have been raised to 6,000 and I've hit that countless times with no issues with the new OEM pulley.

 

[Matthew Jeschke]

I assume the crankshaft being the same between the 5.3 and 6.0 means the pully is also the same.

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[Dantheman1540]

I assume the crankshaft being the same between the 5.3 and 6.0 means the pully is also the same.

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Pretty sure all truck pulleys are the same, just don't get one from a vette or ctsv.

 

[Matthew Jeschke]

I huffed, and I puffed, and this came out...

Now I might have got ahead of myself. I need to get the harmonic balancer bolt out [emoji51] As much as I hate to admit, I pulled out the impact and no dice. Those are really on tight.

 

[Matthew Jeschke]

photo photos don't seem to work :/ engine is out.

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[Matthew Jeschke]

Minor annoyance here. I got the harmonic balancer off the old motor. Got a new one from Amazon returns. I think the new one will work, however...

Box and part I ordered say one part number, 19300488 HERE

They sent me another part number but seems to cross reference, 12634105 HERE, cross referenced HERE

UPDATE: Seems this gets even more complicated. The 19300488 doesn't reference back on GM Parts Direct before 2003. There doesn't seem to be a part number for the damper for the year 2001 there. However, I found this damper on Amazon that does mate up with my crank but nothing in a 6.0 build HERE So I took and compared the part number 1930048 (really 12634105 I think is Dorman's version). It appears to have exact same outside dimensions and weight just is a bit different casting. Geese, appears GM stopped making the older casting / harmonic balancers but hasn't updated older parts catalogs?

UPDATE 2: I'm searching the 12634105, seems GM changed the casting # on the puller HERE. Older version is the 12634105 which I'm finding in some parts catalogs references back to 1999 trucks. So I'm keeping what they sent me.

 

[Dantheman1540]

What impact do you have? My M18 Milwaukee 1/2 extra torque model zipped 2 crank bolts right out so far. My porter cable failed though.

 

[Matthew Jeschke]

@Dantheman1540 I have the Milwaukee 3/8 drive M12. The small guy of the group. It was pulling the pulley off, all be it very slowly. I ended up getting out a breaker bar and it came right off.

 

[Matthew Jeschke]

I need to figure out where to get the seals for the valley tray / knock sensors. Nevermind, that was easy. Found them on eBay.

 

[iamdub]

Minor annoyance here. I got the harmonic balancer off the old motor. Got a new one from Amazon returns. I think the new one will work, however...

Box and part I ordered say one part number, 19300488 HERE

They sent me another part number but seems to cross reference, 12634105 HERE, cross referenced HERE

UPDATE: Seems this gets even more complicated. The 19300488 doesn't reference back on GM Parts Direct before 2003. There doesn't seem to be a part number for the damper for the year 2001 there. However, I found this damper on Amazon that does mate up with my crank but nothing in a 6.0 build HERE So I took and compared the part number 1930048 (really 12634105 I think is Dorman's version). It appears to have exact same outside dimensions and weight just is a bit different casting. Geese, appears GM stopped making the older casting / harmonic balancers but hasn't updated older parts catalogs?

UPDATE 2: I'm searching the 12634105, seems GM changed the casting # on the puller HERE. Older version is the 12634105 which I'm finding in some parts catalogs references back to 1999 trucks. So I'm keeping what they sent me.

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I hope you got this out of your system now! Going forward, just know that GM changes their part numbers ALL the time. I'm sure it's just as often due to something as simple as a part coming from a different supplier as it is a change in design. In this case, it's a crank pulley- if the functional dimensions match your old one, run it.

"...What's in a part number? That which we call a 12634105, by any other number would spin as sweet?"