What does this term mean "6 bolt swap" I have a 98 eclispe N/T How can it apply to me?

How hard would it be For me to drop a 1g eclipse 4g63t in my N/t 2g Eclipse? What all would i have to change in my car?

 

The 6-bolt swap refers to the 6-bolt 4g63 engine, mostly found in the pre-95 (1G)eclipse turbo's and galant VR4's. It apply's to the 2G Eclipse's(95-99) turbo models, and it's pretty much just drop the 2g engine and put in a 1g engine. The term 6-bolt refer to the amount of bolts that mate the crank to the flywheel. In 1g cars, there are 6 bolts holding the flywheel, in 2g cars there are 7 bolts. The reason you'd want to switch to a six bolt engine is because the 6-bolt engines are a bit more reliable and stronger than the 7-bolt engines. The 6-bolts came with larger rods and lower compression pistons. The 7-bolt engines also suffer from a common problem called Crankwalk. Crankwalk is when the crank tends to "wobble" around while spinning about it's axis, thus destroying bearing and eventually the entire bottom end. So far, no one has really determined the ultimate cause of Crankwalk, and it seems to only afflict the 2g 4g63 engines built in the DSM plant(within the Mitsu community atleast, Crankwalk can happen to any engine!). Also it's hard to see the symtops of Crankwalk early on, you only really know you have it when things go really bad. So switching to a 6-bolt engine slims down the chance of crankwalk quite a bit, although there are some that have had it. Generally though, the 6-bolt engine are stronger and made to produce more power than the 7-bolt engines, due to a stronger block and a more free flowing head. None of this really applies to you though, since the 4g63 is rather difficult and expsensive to swap into a 420a equipped car. To do the swap, you'd need to change out the engine, transmission, axles, all sub-driven systems(i.e. power steering, power brakes, AC system...), and then some of the other important thing like ECU, Wiring, Shift Linkage, Gauge cluster, Radiator.....well the list goes on. It more costly than time consuming though, since you would basically need a front clip of an eclipse or galant vr4 with the same engine orientation. If you *really* wanted to though.....you could....but set aside some spare money and time!

 

Crank walk is movement on the crank from crank berring failure, the crank will eventualy slide over and take out your crank position sensor making the car not run.

6 bolts where not made for more power, they just have less of a chance of getting crank walk. There are ups and downs of bolth motors. 6 bolt is the most reliable way to go.

I would sell your car and buy a turbo modle.

To swap a NT to a 6 bolt 4g63 You would need a new tranny, motor mounts, ECU and wiring harness linkage and a *** load of other crap.

 

if you are serious about doing the swap my advice is to buy a POS 1g DSM turbo that has been rear ended or just beat to **** pay 500 bucks for it and you now have everthing you need to do the swap.

 

You can sell your 98 GS for enough to get a 2g GSX.