 Technical Guides Database
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 Large Port/Small Port? 7 Rib/3 Rib? Aedave
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The Info About the 4A-GE in the North American market Corolla Pay close attention to each description AE86 4A-GE 1984-EARLY 1987 LARGE PORT TVIS HEAD AND INTAKE(BLUE LETTERS) 3 RIB BLOCK 9.4:1 COMPRESSION RATIO SMALLER 40MM CON ROD JOURNAL(CRANKPIN) SMALLER 18MM PISTON PIN(PRESS FIT) LATER 1987(04??/87)-END OF PRODUCTION LARGE PORT TVIS HEAD AND INTAKE(BLUE LETTERS) 7 RIB BLOCK 9.4:1 COMPRESSION RATIO SMALLER 40MM CON ROD JOURNAL(CRANKPIN) SMALLER 18MM PISTON PIN(PRESS FIT) AE92 4A-GE 1988-1989 LARGE PORT TVIS HEAD AND INTAKE(RED LETTERS) 7 RIB BLOCK 9.4:1 COMPRESSION RATIO LARGER 42MM CON ROD JOURNAL(CRANKPIN) LARGER 20MM PISTON PIN(FULL FLOATING) 1990(9/89)-1991(6/91)END OF PRODUCTION SMALL PORT/NO TVIS/INTAKE HAS RIBS(RED LETTERS) 7 RIB BLOCK 10.3:1 COMPRESSION RATIO LARGER 42MM CON ROD JOURNAL(CRANKPIN) LARGER 20MM PISTON PIN(FULL FLOATING) PISTON OIL SQUIRTERS/OIL DRAIN@REAR INTAKE SIDE Other notes: All came with EGR systems All came with Air meters (except ae92 GeoPrism GSI MAP) The small port used a different air meter and had a knock sensor the ae92 7 rib engines have a fully counterweighted crankshaft (heavyer/stronger/smoother) 3 rib engines have a partially counterweighted crankshaft (lighter/not as smooth) Small port engines have a higher volume oil pump! Pistons do not interchange without machine work! As you have read Do Not refer to the 4A-GE as red top or blue top its in accurate. There is a Large port engine that came in the Ae92 in 1988 and 1989 that had red lettering. The above info is correct to my knowledge and experience, it was not just gathered from the internet
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2026-04-30
Tokyo, Japan
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