Removing Pistons - GT3: Notes

CAUTION: Ingress of dirt

→ Absolute cleanliness is essential when working on the engine.

→ Lay removed engine parts on a clean base and make sure to cover them.

→ Use the cover for dust protection when fitting the engine NR.165 on the engine assembly support.

Component overview:

Fig 1: Overview Of Pistons And Cylinders

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Item	Number	Designation	Removal	Installation
1	2	Cylinder housing	Check and clean sealing faces, identify sealing faces (cyl. 1-3 or 4-6)
2	6	Cylinder sleeve	Clean, check for wear, identify (cyl. 1, 2, 3...), assign to pistons accordingly	Only install with a new piston (see Item 7) if required, coat running surface with new engine oil
3	6	O-ring, 104.0 x 2.0		Replace, fit with special grease (000.043.205.10), do not turn
4	12	O-ring, 110.0 x 2.50		Replace, fit with special grease (000.043.205.10), do not turn
5	12	Piston-pin circlip		Replace; ensure correct seating
6	6	Piston pin	Clean, assign to the corresponding piston	Coat with new engine oil
7	6	Pistons	Check for wear (shank diameter), identify according to cylinder sequence	Install new pistons, if required, only with a new cylinder sleeve, coat piston shank with new engine oil
8	6	Piston ring package	Check for wear	Replace if necessary
9	8	Straight pin, A 8.0 x 14	Check for signs of damage	Check for correct seating, replace if necessary
10	2	Cylinder base gasket		Replace, observe installation position (Top marking must be facing the observer)