Info

Engine, Crankshaft, Pistons

Note

Installation must be performed carefully and with feeling. If too much resistance is encountered, interrupt installing procedures, check rings and start again.

Note

Different tolerance groups could be used in one engine.

Tolerance Group of Pistons and Cylinders

Checking Connecting Rod Radial Play

1. Only match pistons and cylinders having the same tolerance group.

2. Note cylinder marks on engine block.

1. Remove connecting rod cap, clean bearing shell and connecting rod bearing journal to remove oil. Place Plastigage having width of bearing on crankshaft journal in axial direction. Install bearing cap carefully and tighten to specified torque.

Note

Do not turn crankshaft while measuring.

2. Remove connecting rod cap. Width of flattened Plastigage is read off of measuring scale which corresponds with bearing play.

Wear limit: 0.10 mm a = Cylinder mark (arrangement) b = Tolerance group

3. Note piston marks on piston skirt.

Porsche Classic Models

Porsche Classic Models

The History of Porsche Cars through its generational changes. A must have ebook for any Porsche fanatic, this ebook is a reference book for Porsche enthusiasts. Discover all there is to know about the greatest Porsches ever made. All models are fully described and illustrated providing a definitive production history plus an accurate guide to original specs and equipment.

Get My Free Ebook


Post a comment