Spun rod bearing

[asetech]

I just bought an 89 N/A mr2 with the original motor for dirt cheap. Found the #3 rod bearing has spun tore up that rod and the crank. I was looking for a replacement motor. What cars use the same block. Want it to be a direct fit. I can transfer components from old motor I just don't want to have to Fabricate anything or build a new harness.

[328FTW]

Some corollas and the Levin used the 4age. They are bolt ins, the wiring harness is different but you just swap them over and turn key.

You can get good short block pretty cheap from another mr2 usually.

[asetech]

I have been unable to find any mr2 engines or short blocks at any local salvage yards. What is a Levin.

[mmaxrossixx]

ae86 rwd corolla 82-87 were the years of production i believe

[ebouwman]

well is this your dd? And are you trying to build it up, or do you just need to keep it the same?

I guess that if you want to keep the stock wiring harness though, and you just want a direct bolt in and then forget about it your only option is another 4age.

You've gotta watch though with the ae86's engine, cause the rwd ones i think have a slightly different block, can anyone confirm this? If that is the case though, then you'd need to find a fwd ae86

[mmaxrossixx]

there is no such thing as fwd ae86
AE82? FWD sedan, 2-door/4-door, hatchback (Std, LE, LE Ltd, SR-5) 3-door (FX/FX16)
AE84? 4WD 5-door wagon (Std, DX)
AE86? RWD coupé 2-door, 3-door hatchback (SR5 and GT-S)

[asetech]

This will be a daily driver. I would consider putting in a different motor. I just dont want to fabricate brackets for the mounts. The wiring and an ecu is not a big problem. I just don't trust my fabricating skills or my welding. Is there an engine swap where I could utilize the stock mounts?

[ebouwman]

Originally Posted by mmaxrossixx

there is no such thing as fwd ae86
AE82? FWD sedan, 2-door/4-door, hatchback (Std, LE, LE Ltd, SR-5) 3-door (FX/FX16)
AE84? 4WD 5-door wagon (Std, DX)
AE86? RWD coupé 2-door, 3-door hatchback (SR5 and GT-S)

My mistake, i meant corolla.

Originally Posted by asetech

This will be a daily driver. I would consider putting in a different motor. I just dont want to fabricate brackets for the mounts. The wiring and an ecu is not a big problem. I just don't trust my fabricating skills or my welding. Is there an engine swap where I could utilize the stock mounts?

You could put in a 20v 4age in, usually you have to get them from a jdm importer, there's one for sale right now in the mk1 parts section.

I believe they'd bolt right into the stock mounts, they're the same basic engine, but instead of 16 valves there are 20 (3 intake and 2 exhaust) and they have vvt. And there are 2 types, the silvertop, and the blacktop, the blacktop makes a bit more power, but both make similar or more power than the supercharged engine for the mr2.

As for ecu/wiring harness one of the site members will make you one for something like 350 bucks that'll be plug and play, just needs the old harness and the 20v's harness.

And oh ya, even though it makes similar/better numbers than the 4agze it still gets better fuel economy.

EDIT: http://www.mr2.com/forums/20v-swaps/...swap-info.html

[toyotaspeed90]

in the US the following cars had 4age bigports:

1984-1987 toyota corolla GT-S (RWD)
1984?-1987 toyota corolla FX16 and FX16 GT-S (FWD 2 door hatchback)
1988-1989 toyota corolla GT-S
1985?-1987 Chevy Nova Twin Cam 16
1984-1989 Toyota MR2

The smallport (upgraded motor, but not 100% compatible with your harness) came in:
1990-1991 toyota corolla gt-s (FWD)
1990-1992 geo prizm gsi (any other trim has a 4afe)


In the US, that is IT. Outside of the US, all bets are off... they came in older rwd celica's, corolla's (all variants & trims), then there were supercharged corolla's, 20V corolla's, etc....

[asetech]

Whats the difference between the smallport and bigport. If i was to get a small port would I need that ecu also. And would my manual trans mate up to all of these motors? Thanks for all the input.

[ebouwman]

Originally Posted by asetech

Whats the difference between the smallport and bigport. If i was to get a small port would I need that ecu also. And would my manual trans mate up to all of these motors? Thanks for all the input.

The difference is mainly the size of the intake ports.

The bigports have such big intake ports that they need the t-vis to close of part of the intake to essentially make the ports smaller so that you can get torque at low rpm. The smallport has no such thing