Maintenance — Serpentine Systems

The M10 x 1.5mm holes in the engine block and heads are 20mm deep.

Supercharger Serpentine

ID	Thread	Length	Block Spacer	Rear Plate Spacer	Front Plate Spacer
A	M10 x 1.5 mm	65mm	Welded	Machined	n/a
B	M10 x 1.5 mm	110mm	Welded	Machined	n/a
C	M10 x 1.5 mm	110mm	Welded	20mm x 3.650"	n/a
D	M10 x 1.5 mm	160mm	Welded	20mm x 3.650"	TBD
E	M10 x 1.5 mm	135mm	n/a	20mm x 3.650"	20mm x 0.560"
F	M10 x 1.5 mm	85mm	n/a	20mm x 3.650"	n/a
G	M10 x 1.5 mm	130mm	n/a	20mm x 3.650"	n/a

ID	Qty.	Thread	Length	Rear Plate Spacer	Front Plate Spacer	Notes	Device
A	1	M10 x 1.5 mm	180 mm	20mm x 3.650"	0.940" plus shoulder		?" Pulley
B	1	M10 x 1.5 mm	110 mm	20mm x 3.650"	n/a		n/a
C	1	M10 x 1.5 mm	170 mm	20mm x 3.650"	0.25"		Tensioner
D	1	M10 x 1.5 mm	130 mm	20mm x 3.650"	n/a		n/a
E	1	M10 x 1.5 mm	120 mm	20mm x 3.650"	n/a		n/a
F	1	M10 x 1.5 mm	120 mm	20mm x 3.650"	n/a		n/a
G	2	M8 x 1.25 mm	25 mm	n/a	n/a		A/C Compressor
H	2	M8 x 1.25 mm	35 mm	n/a	n/a	Nyloc	A/C Compressor
I	1	M10 x 1.5 mm	120 mm	16 mm x 1.650"	n/a	Nyloc	Alternator
J	1	M8 x 1.25 mm	25 mm	n/a	n/a		Alternator
K	2	1/4"-20	1/2"	n/a	n/a		Tensioner

Belt: Bando 6PK1170
Tensioner: ACDelco 38323; replaced plastic OEM pulley with a larger 3” billet pulley, added a 1 mm shim between the pulley and the bracket
A/C Compressor 2x 0.020” shim (stainless steel)
With respect to tensioner mounting, the holes in the front plate are 30 degrees apart, the tapped holes in the spacer are 20 degrees apart and the anti-rotation holes are 5 degrees apart when the spacer is rotated 180 degrees.
To release the accessory tensioner, place 3/8” breaker bar in the end of the arm and apply pressure in an upward, counter clockwise direction. Ensure that it doesn’t slip out or the arm will be irreparably damaged.

BELTS