changed oil on 98 gtp. started motor and checked for leaks. injectors seem to make the usual clicking sound. after a few minutes a new clicking/rattle sound started. seemed up high and i could feel it thru the supercharger case. is this normal or something to watch? could it be the SC coupler?

SC Coupler. easy fix.

Coupler.

from an N/A guy: coupler. I was there for the diagnosis and replacement of a blower coupler a couple of years ago in North Carolina. It makes a clicking noise and is eliminated after plugging in a new plastic piece. IIRC, it's about 2 hours under not-ideal conditions.

i took off SC belt and turned pulley CW and CCW and did not feel any looseness in snout. should i feel some free play in pulley? not that a coupling is a big deal.

not necessarily. iirc, the pulley I felt had no play in it, but it did click.

i have the same problem, i was told it was the tensioner which i havent changed yet. but i will check the coupler. is it a easy job?

No see you said it was coming from the Tensioner area he can feel it through the S/C case. Big diff and the reason for two different diagnoses.

Here's a write up: How to replace an M90 snout coupler

well everyone kept sayin it was the coupler even though it is comein from the tensioner.

take off the supercharger belt and spin the tensioner and idler pulleys, you'll know if one needs to be replaced.

yea i just did that, it was the tensioner, replaced it and now the rattle is gone. changed the idler pulley too cuz it was wobbleing. thanks for your input.