Difference between 4ac and 4alc?

[codiowner]

Can anyone tell me the difference between the 4ac and the 4alc? My Haynes manual does not mention the 4alc. I need to replace the engine in my 86 corolla (4 door sedan with 3 speed automatic.) I believe my engine is the 4ac. I would like to replace it with the 4alc.

[fredk]

A series (inline 4, belt, 1.3-1.6L, 1978-): Corolla FWD/RWD, MR2, Tercel FWD

1A SOHC 2 78-79 1452
2A SOHC 2 79- 1295 76 71.4
2A* SOHC 2 84 1295 69@6000 75@3800
2A-U SOHC 2 82 1295 74@5600 78@3600 76 71.4 9:1
2A-U SOHC 2 86 1295 65@5400 72@3600 76 71.4 9.3:1 EU
2A-U SOHC 2 86* 1295 75@6000 79@3600 76 71.4 9.3:1
3A SOHC 2 79- 1452 77.5 77
3A* SOHC 2 84 1452 71@5600 79@3800
3A SOHC 2 88 1452 62@4800 76@2800 3.05 3.03 9:1
3A-C SOHC 2 79 1452 62@4800 75@2800 3.05 3.03 9:1
3A-U SOHC 2 82 1452 80@5600 87@3600 77.5 77 9:1
3A-U SOHC 2 85 1452 83@5600 87@3600 77.5 77 9:1
3A-U SOHC 2 86 1452* 85@5600 87@2400 77.5 77 9.3:1
3A-U SOHC 2 86 1452 71@5600 83@2400 77.5 77 9.3:1 EU
3A-U SOHC 2 86 1452 63@5600 76@2400 77.5 77 9.3:1 US
3A-LU SOHC 2 86 1452* 83@5600 87@3600 77.5 77 9.3:1
3A-SU SOHC 2 85-88 1452 77.5 77
3A-SU SOHC 2 86 1452 90@6000 89@4000 77.5 77 9.3:1
4A SOHC 2 80- 1587 81 77
4A-LU SOHC 2 84-86 1587 84@5600 96@4000 81 77 9.3:1
4A-E SOHC 2 81-88 1587 78@5600 87@4000 81 77 9:1
4A-ELU SOHC 2 86 1587* 100@5600 101@4000 81 77 9.3:1
4A-C SOHC 2 83-86 1587 70@4800 85@2800 3.19 3.03 9:1
4A-LC SOHC 2 87-88 1587 74@5200 86@2800 3.19 3.03 9:1
4A-F DOHC 4/22.3 87-88 1587 90@6000 95@3600 3.19 3.03 9.5:1
4A-F DOHC 4/22.3 89-90 1587 90@6000 95@3600 3.20 3.00 9.5:1
4A-FE DOHC 4/22.3 87-90 1587* 100@5600 101@4400 3.19 3.03 9.5:1 Japanese version
4A-FE DOHC 4/22.3 87-90 1587 102@5800 101@4800 3.19 3.03 9.5:1 US version, SAE net
4A-FE DOHC 4/22.3 87-90 1587 100@5600 102@4400 3.19 3.03 9.5:1 California
4A-FE DOHC 4/22.3 89- 1587 103@5600 101@4800 81 77 9.5:1
4A-FE DOHC 4/22.3 93-95 1587 105@5800 100@4800 81 77 9.5:1 Canada
4A-FE DOHC 4/22.3 93-95 1587 100@? ? 81 77 9.5:1 California
4A-FE DOHC 4/22.3 95-98 1587 115@6000 109@4800 81 77 9.5:1 JP
4A-GE DOHC 4/50 83- 1587
4A-GE DOHC 4/50 85-86 1587 112@6600 97@4800 3.19 3.03 9.4:1
4A-GELU DOHC 4/50 86 1587* 130@6600 110@5200 81 77 9.4:1
4A-GELU DOHC 4/50 86 1587 124@6600 105@5000 81 77 10:1 EU
4A-GELU DOHC 4/50 86 1587 120@6600 102@5000 81 77 9.4:1
4A-GELU DOHC 4/50 86 1587 115@6600 98@4800 81 77 9.4:1 cat, US
4A-GE**(C/LC) 4/50 87 1587 112@6600 97@4800 3.19 3.03 9.4:1
4A-GEC DOHC 4/50 88 1587 116@6600 110@4800 3.19 3.03 9.4:1
4A-GEC DOHC 4/50 89-90 1587 116@6600 100@4800 3.19 3.03 9.4:1
4A-GELC DOHC 4/50 88 1587 112@6600 100@4800 3.19 3.03 9.4:1
4A-GELC DOHC 4/50 89-90 1587 115@6600 100@4800 3.19 3.03 9.4:1
4A-GELU DOHC 4/50 90 1587* 138@7200 109@6000 81 77 9.4:1 Japanese version
4A-GE DOHC 4/50 85-87 1587 124@6600 104@4800 81 77 10.0:1 Finnish version
4A-GE DOHC 4/50 85-87 1587 122@6600 105@5000 81 77 10.0:1 UK version
4A-GE DOHC 4/50 88-89 1587 125@6600 107@5000 81 77 10.0:1 Finnish version
4A-GE DOHC 4/50 88-89 1587 123@6600 81 77 10.0:1 UK version
4A-GE DOHC 4/50 90 1587 130@6800 102@5800 3.19 3.03 9.5:1
4A-GE DOHC 4/50 91-92 1587 130@6800 105@6000 3.19 3.03 10.3:1
4A-GE DOHC 5+VVT 91-98+ 1587 165@7800 120@5600 81 77 11.0:1 AFM, VVT
4A-GE DOHC 5+VVT-i ? 1587 170 87 77 MAP sensor, VVT-i
4A-GZE DOHC 4/50 86-90 1587 145@6400 140@4000 3.19 3.03 8.0:1
4A-GZE DOHC 4/50 86-89 1587* 145@6400 137@4400 81 77 8.0:1 JP AW11, AE92 8psi/0.56bar
4A-GZE DOHC 4/50 89-91 1587* 165@6400 152@4400 81 77 8.9:1 JP AE92 high-octane
4A-GZE DOHC 4/50 91-95 1587* 170@6400 152@4400 81 77 8.9:1 JP AE101 high-octane
5A-F DOHC 4/22.3 87- 1498 85@6000 90@3600 78.7 77 9.8:1
5A-FE DOHC 4/22.3 87- 1498* 104@6000 97@4800 78.7 77 9.6:1
5A-FE DOHC 4/22.3 95-98 1498 100@5600 102@4400 78.7 77 9.8:1
6A-FC DOHC 4 89-92 1397 82 87 76 77 9.5:1
7A-FE DOHC 4/22.3 93-94 1762 115@5600 115@2800 81 85.5 9.5:1
7A-FE DOHC 4/22.3 93-94 1762 115@5600 110@2800 81 85.5 9.5:1 Canada
7A-FE DOHC 4/22.3 98 1762 115@5400 114@2800 81 85.5 9.5:1 Japan


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[ratboycom]

the L is basically to say that it is a Laterally mounted motor versus horizontally
basically front wheel drive vs rwd

[codiowner]

So would the 4alc and the 4ac mate with the automatic transmission without any difference? Would the 4alc mount in the engine compartment without any modifications?

[Gokhan]

L in 4A-LC stands for lean-burning and C stands for emission control.

There are very minor differences between the two engines. 4A-LC is a little more fuel-efficient (a good thing for these gas-miser cars of mid 1980s) than 4A-C and it's far more common (~ 99%), as it's the engine found in the FWD sedans and five-door liftbacks. 4A-C is only found in some RWD coupes (the low-end models without the powerful 4A-GEC engine). Here are the specs on the carburetors for the two engines:

Engine type: 4A-LC

Carburetor no.: 16120 (1984 Federal and California emissions, 1985 California-only emissions), 16030 (1985 Federal emissions [more complicated emissions, more emission-control systems provided than California-only emissions]), 16210 (1986 - 1987 Federal and California emissions)

Primary main jet (mm): 1.03
Secondary main jet: 1.62
Power jet: 0.40

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Engine type: 4A-C

Carburetor no.: 16160 (1984 - 1985 Federal and California emissions), 16220 (1986 - 1987 Federal and California emissions)

Primary main jet (mm): 1.03
Secondary main jet: 1.59
Power jet: 0.44