Donor car 2004 impala base with n/a 3800 series 2 vin k
target car 2004 impala ss with supercharged 3800 series 2 vin 1

Base model 201k miles
ss model 172k miles

Thank you for the advice, on the belt cathedralclub and also after reading another thread about harmonic balancer, mine moves 1.5 inches left or right then is stiff, i think this means bad harmonic balancer by what was described in the other thread.

Easy way to figure out if the problem is the supercharger or not is to remove the supercharger belt then start the engine and check for the noise.

Ok i will check in the morning when i get off work and get back to you, thanks again

One other thing the check engine light went off but my oil pressure gauge goes up and down with throttle, previously my oil pressure sending unit on the park avenue ultra caused this but i used the same one from the l36 which had no issues with this. Help?

Its not the supercharger ill be changing the hrmonic balancer and waterpump, to start, then ill buy a set of heads and go from there but hopefully that wont be necessary.

The lifters came from.my l36 block, do these need to change for the l67 platform? Or is there something in the head that can cause this noisey tickk?