Given its location it can be difficult to visualize how the fan belt tensioner is oriented and mounted.
Pic 1: mounting cavity with both Power-Steering pulley and tensioner removed:

Pic 2: The back of the tensioner w/protruding mounting bolt, off-vehicle. The blue-ink is excess medium thread-locker:

Pic 3: Tensioner and PS pulley installed:


- Unlike many multi-bolt mounted tensioners, the CRD uses only one mounting bolt combined with two metal pegs extruding from the back of the tensioner-housing to create resistance for the tensioner's internal spring.
- The tensioner's pulley-bolt is 15mm (for flexing the pulley to install the belt).

Other folks' tips and notes invited.

Keys: install remove replace R&R CRD serp serp-belt serpentine-belt serpuntine surpintine fan accessory belt CRD tensioner

_________________
'15: bought '05 w/138k.
'16: HG/Rockers/ARPs/Thermo/H20pump/TbeltKit/ Seals/ Mounts/Kennedy fuel pump.
'17: bought manual Gas donor for its' ARB F/R Airlockers, OME 2.5" lift (gas-rated), JBA UCAs, ARB bumper.
'19: Trans w/Suncoast/Transgo/HDdiscs, new OME CRD-rated lift, electric tri-fan setup, BlackMagics/Centric Premiums, Airbags.