|
|
(3) Before removing valves,remove any burrs from valve stem lock grooves to prevent damage VALVE INSPECTION (1) Clean valves thoroughly and discard burned, warped and cracked valves. (2) Measure valve stems for wear. Refer to specifica- tions (Fig. 19). Valve stems are chrome plated and should not be polished. (3) Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner. (4) Measure valve stem guide clearance as follows: (a) Install valve into cylinder head so it is 14mm (.551 inch) off the valve seat. A small piece of hose (b) Attach dial indicator Tool C-3339 to cylinder head and set it at right angle of valve stem being (c) Move valve to and from the indicator. Refer to specifications (Fig. 19). dial indicator reading is excessive or if the stems are (5) Service valves with oversize stems and over size seals are available in 0.15mm (.005 inch), 0.40mm, Oversize seals must be used with oversize valves. Reamers to accommodate the oversize valve stem are as follows: (6) Slowly turn reamer by hand and clean guide thoroughly before installing new valve. Do not at- VALVE GUIDES Replace cylinder head if guide does not clean up with 0.80mm (.030 inch) oversize reamer, or if Fig. 18 Intake and Exhaust Valves Fig. 19 Valve Guide Specifications Fig. 16 Compress Valve Springs with Special Tool C-3422B with adapter 6412 Fig. 17 Measuring Valve Guide Wear Ä 3.3/3.8L ENGINE 9 - 105 |