Page 243 of GM Performance Parts 2006 Catalog by GM Parts Direct

Chevrolet 90 V-6 Valve Cover C Pushrod Guide Plate (aluminum Bowtie head) D Heavy-Duty Composition Head Gasket B 241 NOTE: NOTE: V-6 CYLINDER HEAD GASKETS B. 10185081 Heavy-Duty Composition Head Gasket Teflon-coated gasket with pre-flattened wire O-rings around each cylinder. For competition engines with cylinder bores of 4.00" to 4.125". Compressed thickness is 0.041". Drill steam holes when used on 400 ci smallblocks. Gasket does not require re-torquing. V-6 90 VALVE COVERS C. 12480057 Chevrolet 90 V-6 Valve Cover For 18 V-6 with CNC-ported cylinder heads P/N 24502523 or 90 V-6 Bowtie casting P/N 10134359 with revised valve cover rail. Relocated bolt holes increase pushrod and rocker arm clearance. Use with gasket P/N 24502557. Sold as single piece. Order two per engine. V-6 VALVE SPRINGS 12363215 Valve Spring (not shown) This is a moderate-performance chrome silicone wire spring, as used in the 3.4L conversion package. Spring produces 105 pounds of seat pressure at an installed height of 1.70" and 296 pounds open pressure at a height of 1.20". Use with retainer P/N 12363216 (see below). 12363216 Valve Spring Retainer (not shown) Heavy-duty 4140 heat-treated steel retainer with 1.203" diameter for use with 11/32" valve stems. This is same part used in the 3.4L conversion package. V-6 90 PUSHROD GUIDEPLATES D. 14011051 Pushrod Guide Plate (aluminum Bowtie head) Hardened steel guide plate has the correct pushrod spacing for aluminum Bowtie heads. Should not be used with selfaligning rockers. Pushrod slots are 0.365". V-6 60 CRANKSHAFTS 10224877 Crankshaft, 4.3L Cast Iron Even-Fire (not shown) Cast iron crankshaft with 3.48" stroke and 3.00" diameter flywheel flange bolt pattern for 1986-and-later 4.3L V-6 engines with one-piece rear main bearing seal. Requires counterweighted flywheel.

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