Page 20 of International Auto Parts Catalog 2006 by International Auto Parts

VALVE ADJUSTING SHIMS ALFA ROMEO 1960-on, 4 Cylinder and V6 thru 1995 Sold individually for $3.55 each in metric sizes only. Order individually by metric size in 0.025mm increments from 1.500 to 3.500mm. Or save money by purchasing the complete set in compartmented boxes as follows: Item No. Range Shims Qty Price 6661 1.500 2.500 205 $298.00 6667 2.525 3.500 200 298.00 FIAT, LANCIA, BERTONE AND PININFARINA, All, 1968-on, overhead cam engines. Sold individually for $2.15 each in metric sizes only. Order individually in 0.05mm increments from 2.55 to 5.20mm. Or save money by purchasing the complete set in compartmented boxes as follows: Item No. Range Shims Qty Price 6662 3.25 4.90 68 $ 119.00 ADJUSTING VALVE CLEARANCES Youll need a proper service manual, a metric feeler gauge, a micrometer and-for Fiats-the proper shim removal tool. Start by filling out a chart like this (these numbers are from a typical 4-cylinder Alfa; the concept is similar for Fiats): Clearance (mm) Shim (mm) Correct Current Current Correct Intake 1 .40 .35 2.000 -.05 1.950 2 .40 .42 1.900 +.02 1.920 3 .40 .40 2.125 .00 2.125 4 .40 .37 1.950 -.03 1.920 Exhaust 1 .45 .45 1.800 .00 1.800 2 .45 .40 2.000 -.05 1.950 3 .45 .44 1.875 -.01 1.865 4 .45 .50 1.800 +.05 1.850 Consulting your manual, first write in the factory-recommended clearances in the correct clearance column. Next, following the procedure in the service manual, measure the clearance between the heel of each cam lobe and its tappet, and record your findings in the current clearance column. Then compare these measurements with factory specs and record the variance in the +/column. Now, measure the thickness of the existing shim with your micrometer, recording this in the current shim column. Add or subtract the value in the column to (or from) the current shim size. The resulting figure is the shim needed to restore proper clearance. Round up or down to the nearest size. Alfa shims are graduated in .025mm steps, Fiat shims in .05mm steps. If a valve is split evenly between two sizes, round downward (its safer to have a valve a bit too loose than too tight). ORIGINAL TAPPETS, VALVE SEALS KEEPERS Tappets Valve Seals Keepers Item Price Item Price Item Price ALFA ROMEO No. Each No. per Pkg. No. Each All 4-cyl, 1960-on 34751 $18.25 38004* $13.25 37513 $1.85 6-cyl. 1981-93 (intake tappet) 34751 18.25 38002** 9.95 37513 1.85 (exhaust tappet) 34754 22.95 1994-95 38003 11.75 FIAT, LANCIA, BERTONE AND PININFARINA, ALL Overhead cam 1968-87 52447 $14.95 41743* $ 4.95 37514 $1.95 57003# 9.95 Notes: *Orig. Viton, pkg. of 4. **Orig. Viton, pkg. of 3. Orig. equip., pkg. of 3 #Teflon, pkg. of 4. PUSHRODS FOR ALFA ROMEO V6 Fits all 2.5 and 3.0 engines, 1981-93 #41263, $42.70 each Now you can do your own valve adjustments with either individual shims or a complete set. Save money by purchasing a complete set, which comes in a compartmented box. Imported from Italy. Individual shims are listed on our website. Can be purchased individually. MILLIMETER - INCH CONVERSION Dealing with metric valve shims and overbores can be confusing, but the conversion is simple if you have a calculator. To convert millimeters to inches, divide the millimeters by 25.4. To get millimeters from inches, multiply the inches by 25.4. TIMING AN ALFA What are those strange letters on the 4-cylinder Alfa Romeo crankshaft pulley? They stand for Italian words: F Fissa Fixed. The correct advance for static ignition timing. P Punto Top dead center. M Massimo Ignition timing at maximum advance (usually 5000 rpm; see above). I Iniezione Crankshaft position where SPICA injection pumps timing marks are aligned (where fitted). 20 Youll find even more parts online at www.international-auto.com VALVE TRAIN 34751 38002 37514 WE TEST WHAT WE SELL As part of our testing program, we decided to build and dyno-test a high-performance Alfa Romeo 2000 engine using only parts we stock. First, we took an International cylinder head and re-shaped the ports and valve seat areas, and added bigger valves. Next, we installed our Autocross cams, for great high-RPM breathing. Down below, we put in 10.4 to 1 Borgo pistons and liners (page 25), which still gave plenty of piston-tovalve clearance. We finished off with a set of 40DCOE Weber carburetors (page 11). The result confirmed what I expected: a 55% increase in power, all the way from 110 bhp stock to a screaming 170 bhp. Wow! Paul Opiela, President IAP motor on the dyno. Typical pulley on a SPICA-injected Alfa

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