is it possible to fit a l24 or any l inline six motors in a 620

95hb wrote:is it possible to fit a l24 or any l inline six motors in a 620

Not worth the effort....just get a KA.

naw i would just leave the L thats in there . dont get me wrong i love ka's mostly single cams but i like to keep the generations the same

Years ago I saw a couple 620’s, in the same wrecking yard, that put in either an L24 or L26 in. It fit but they had mounted the radiators in the bed at an angle with a cooling fan mounted on top. Whether or not they were successful I wouldn’t know? A lot of work but a KA is the better choice. I installed a KA24DE from a 1992 240SX over 10 years ago and it’s been a great motor for me ever since.

hello. i would like to do the ka24de swap on my 1978 620 but i dont know what year motor i need or what transmission because i want to keep it rear wheel drive and in the future i want to do turbo as well.

The KA24E were from 1989–1990 and the KA24DE were from 1991–1998 in the 240SX’s. Check out this site for KA24DE turbo info: http://www.ka-t.org/

could build a z24 with a l20b head they are torque monsters

Those old engines are fun to work on. I enjoyed building a 2.0L for my 1973 620. Back in the day when we had to smog them I went around the system by building my L16 into a 2.0L. I pulled the crank shaft from an L20B and had the main ground down to fit the L16 block. I had a buddy of mine with a 520 that had an L18 with a performance cam. The thing broke down so he abandoned it. I pulled the round port head off and used that for my build. Those L16’s are short blocks so I ended up reusing the original rods but had a set of Mitsubishi pistons installed. They had the proper pin position and the machine shop machined the crowns for me. All in all it was a lot of fun and the results, at the time, were outstanding. A few years later they raised the smog cut off so that flung the doors open. Building a Z24 would be a cool build but with some side draft carbs slapped on maybe. The only reason why I pulled my Hybrid is because it wasn’t reliable enough. After the first couple of weeks the dual point distributor blew up but aside from that the constant valve and points adjustments. As years went on it would get the common leaky valve cover and cylinder head gaskets. That’s when I decided to drop in the KA24DE.