Removing and Installing Valve Springs

Special Tool

Use special tool P7 for removing and installing valve springs.

Checking valve springs:

Free length	47 mm (1,85in)
Wire diameter	4.5 mm (. 177in)
Spring tension with spring compressed to 41 mm (1. 61in)	36kp(79, 3lbs) +/- 5kp(3, 321bs)
Spring tension with spring compressed to 30.15 mm (1.19in)	97kp( 213, 21bs)+/- 2. 5k p( 5. 51lbs)

Spring tension variations up to 50% are permissible in used springs.

All valve springs used in one engine must be of equal free length since the length affects springing characteristics.

Checking Installed Length

Note:

Intake and exhaust valve springs are of the same length. The installed spring length is changed or adjusted through the addition or removal of spacers located under the springs.

Important:

The valve springs must always rest on the steel washer and never on the spacers since the spring could damage the spacers.

Install- special tool P 10 with the respective spring retainer and both valve keepers.
Determine the indicated value and correct it, if necessary. by adding or removing spacers.
Install valve springs so that the closely wound coils rest on the 1,5 mm thick washer (see note, above).

Installed length of valve springs is:
Intake = 41,0 mm (1.61in)
Exhaust = 40,5 mm (1.59in)

Note:

Valve springs made by various manufacturers are supplied under the same spare part number. However, all springs (progressive or linear coils) may be paired in one engine.

a = Installed length
b = Steel washer
c = Spacers

Last modified: Mon, 17 Jan 2005

Links

Inventory - Topic Pages - Brakes - Electrical - Engine - Events - Gallery - Interior - Maintenance - Racing - Restoration - Rust Repair - Suspension - Wheels & Tires - Rust research - Recommendations - Porsche Models

Site Details. Disclaimer. Comments? Questions? Dave Hillman
Content attribted to others remains their property. Otherwise the text and images are licensed under a Creative Commons License.