A/c Compressor Servicing BMW Z3 E36

A/C COMPRESSOR APPLICATIONS

Note. Due to variety of clutch and shaft seal configurations, obtain appropriate A/C compressor service tools for compressor being serviced.

A/C COMPRESSOR APPLICATION

Removal

1. Hold clutch plate with Clutch Holder (00007-10331) and remove shaft nut. Install Clutch Disc Remover (4992-02-020) and remove clutch plate and shims. (Scheme 1)
2. Remove pulley snap ring and tap pulley (with bearing) off of compressor. Remove screw for clutch coil lead. Remove snap ring and clutch coil.

Installation

To install, reverse removal procedure. Ensure pulley-to-clutch plate clearance is .014-.025" (.35-.65 mm). If clearance is incorrect, add or remove shim(s) as necessary.

1. Drain and measure compressor oil in compressor. Remove discharge valve body through-bolts. Remove discharge valve body bolts and body. Remove discharge valve plate and discharge valve.
2. Remove compressor through-bolts. Remove front and rear housing (oil separator case). Remove pins and gaskets. Remove shaft seal from shaft. Press shaft seal plate off of front housing (head cover).

To install components, reverse removal procedure. Tighten compressor through-bolts to 19 ft. lbs. (26 N.m). Tighten discharge valve bolts to 41 INCH lbs. (4.6 N.m). Tighten discharge valve body and body through-bolts to 96 INCH lbs. (10.8 N.m).

Scheme 1

NIPPONDENSO 6 & 10-CYLINDER

Note. Due to variety of clutch and shaft seal configurations, obtain appropriate A/C compressor service tools for compressor being serviced.

CLUTCH COIL

Note. On some models, compressor shaft seal is not serviceable. On some models, if shaft seal leak is large and/or refrigerant is leaking, replace compressor. On all models, a small amount of refrigerant oil leakage from compressor shaft seal is normal.

1. Remove nut and clutch plate using Clutch Plate Holder/Remover (J-41384).
2. Remove snap ring and shim(s) from shaft. Tap pulley off shaft with plastic hammer. If pulley cannot be removed by hand, use a puller. Remove snap ring, bearing, and seal (if equipped) from pulley. (Scheme 2)or (Scheme 3). Remove screw for clutch coil lead. Remove snap ring and clutch coil.

To install, reverse removal procedure. Ensure snap rings are installed with beveled side facing out. Tighten shaft bolt (or nut) to 11-15 ft. lbs. (15-20 N.m). Ensure air gap between clutch plate and pulley is .016-.028" (.41-.71 mm). If air gap is incorrect, add or remove shim(s) as necessary.

Note. On some compressors, it is necessary to use a dial indicator on clutch plate to check air gap. Energize clutch coil and zero dial indicator. De-energize clutch coil and measure air gap. Ensure air gap is as specified.

1. Remove clutch plate and pulley. Remove shim(s) from shaft. Remove clutch coil if necessary. Remove felt and felt retainer (if equipped). (Scheme 2)or (Scheme 3). Place shaft key remover on shaft and turn to remove key.
2. Remove seal plate snap ring. Engage plate remover on seal plate, and pull up to remove seal plate. Engage shaft seal remover/installer to shaft seal, and pull up to remove shaft seal from front housing.

1. Apply clean refrigerant oil to compressor housing bore. Lubricate shaft seal with refrigerant oil and install in front housing. Lubricate seal plate and install in front housing.
2. Install shaft key, snap ring, felt retainer and felt. With clutch plate installed, ensure air gap between clutch plate and pulley is .016-.028" (.41-.71 mm). If air gap is incorrect, add or remove shim(s) as necessary.

Scheme 2

Scheme 3

SEIKO-SEIKI ROTARY VANE

Note. Seiko-Seiki compressor servicing procedures not available at time of publication.