Crytek89 Posted December 27, 2015 Report Share Posted December 27, 2015 Hey Guys, First time poster, been on here browsing for a little bit before I decided to make an account. I'm doing a KA24DE swap on my 720 and wanted a place to post updates and get feedback/assistance (looking at you Datzenmike) :P A little backstory to start.. I moved to VanIsland and my gramps asked if I wanted a pickup that he purchased from his friend for $300, came with an '83 parts truck with a running engine and quite a few spare parts. I had never previously owned a Datsun/Nissan before but I liked the look of the truck and the price was awesome. Didn't do much work to it until a year later and after getting a decent job started to think of a vision for it. Currently has new Tires/Rims, NRG steering wheel w/ quick release, new Shift knob.. couple other goodies. First KA I picked up - was a rebuild with a blown crank (Bushing was never installed on piston #2) Second KA, currently in the machine shop getting the head re-done. (slightly blurry, sorry) I'll post updates as soon as I can. Aiming for the swap in February/March. 3 Quote Link to comment
datzenmike Posted December 27, 2015 Report Share Posted December 27, 2015 Welcome to Ratsun Crytek. I don't often see a 720 round here, and none as nice looking as yours. Has an '83-'84 bed on it I see.... fits and look alright. I see both KAs are from S13s or S14s. Car KAs have floating piston pins while the D-21 Hardbody truck engines do not. The floaters have a bushing on the rod that the pin slides into. Truck rods have press in pins. 1 Quote Link to comment
Crytek89 Posted December 27, 2015 Author Report Share Posted December 27, 2015 Thanks Mike, Yeah it was kept in a garage for a number of years before I took possession of it, I know my gramps replaced the box on the truck at some point. Both of the KAs are S13s, fingers crossed I get the parts back tomorrow. 1 Quote Link to comment
datzenmike Posted December 27, 2015 Report Share Posted December 27, 2015 Looks like it was in the garage for almost 40 years. The '85-'86 box has one piece sides that gets rid of that rust prone horizontal welded seam. 1 Quote Link to comment
Crytek89 Posted December 27, 2015 Author Report Share Posted December 27, 2015 Yeah there's certainly some spots on the side of the box with rust that you can see in the first picture. Once the swap and everything is done I'll probably look at re-doing the front fenders and repainting. 1 Quote Link to comment
Draker Posted December 27, 2015 Report Share Posted December 27, 2015 Nice looking 720! Welcome! 1 Quote Link to comment
Crytek89 Posted January 5, 2016 Author Report Share Posted January 5, 2016 Still awaiting the head and front timing cover to come back from the machine shop.. :(on a side note, I got a full gasket set for Christmas :D 2 Quote Link to comment
Crytek89 Posted January 7, 2016 Author Report Share Posted January 7, 2016 So I just got word back from the shop - I had two KA24DE heads, one was better than the other. They recommended to redo the valves, seats, springs, re-plane the head and clean out all of the exhaust/intake ports for a grand total of about $650, taxes in. (CAD) Hopefully it doesn't take too long and then rebuilding can finally begin. 1 Quote Link to comment
Crytek89 Posted January 19, 2016 Author Report Share Posted January 19, 2016 Hey guys, been a bit since an update - Valve cover and intake manifold is back from my friends welding shop - all sandblasted down and cleaned up. I'll have it sent to his dad's power coating shop to have painted next. Front valve covers are back from the machine shop. Still collecting funds to have the head re-done. Still deciding whether or not I'm going to replace the pistons or not.. 2 Quote Link to comment
Crytek89 Posted February 19, 2016 Author Report Share Posted February 19, 2016 Hey Guys! Another update, intake manifold is complete and I'm really happy with it. Some sad news, I was involved in a hit and run and hoping to find a drivers side door replacement soon :( 1 Quote Link to comment
datzenmike Posted February 19, 2016 Report Share Posted February 19, 2016 All 720 doors interchange except power window ones. 1 Quote Link to comment
Crytek89 Posted February 25, 2016 Author Report Share Posted February 25, 2016 Any easy way to remove valve stem seals from the head? Edit: Nevermind, figured it out :) 1 Quote Link to comment
Crytek89 Posted April 24, 2016 Author Report Share Posted April 24, 2016 KA head is finally back from the shop, just the bottom end to do now. 3 Quote Link to comment
Dean720Ada Posted May 12, 2016 Report Share Posted May 12, 2016 isn't there an oil pan clearance issue with the 240 KA that it's a front sump oil pan. Or would it be a tight fit? I just here from other people that oil pan clearance is kind of an issue. 1 Quote Link to comment
Crytek89 Posted May 13, 2016 Author Report Share Posted May 13, 2016 isn't there an oil pan clearance issue with the 240 KA that it's a front sump oil pan. Or would it be a tight fit? I just here from other people that oil pan clearance is kind of an issue. You are correct, the stock KA oil pan won't clear. I have two options that I'm considering. 1) cut the stock oil pan and weld on a portion to clear 2) cut the stock oil pan and make it thinner with a secondary tank to use as overflow. 1 Quote Link to comment
Rhino13 Posted May 13, 2016 Report Share Posted May 13, 2016 Not sure about dual cam, but the single cam you can just use the truck oil pan and pickup. Maybe find one from a frontier? 1 Quote Link to comment
datzenmike Posted May 14, 2016 Report Share Posted May 14, 2016 Not sure about dual cam, but the single cam you can just use the truck oil pan and pickup. Maybe find one from a frontier? Car KAs have a crank girdle that the truck pan won't clear. 2 Quote Link to comment
Lockleaf Posted May 14, 2016 Report Share Posted May 14, 2016 Supposedly generous girdle grinding will allow use of the truck pan, if you feel like it 1 Quote Link to comment
Crytek89 Posted May 15, 2016 Author Report Share Posted May 15, 2016 Supposedly generous girdle grinding will allow use of the truck pan, if you feel like it Hm.. could, would be a lot of work to ensure it doesn't mess up the main bearings through. I'd rather leave in place and just mod the Oil strainer if I can and have the oil pan itself welded to fit. 2 Quote Link to comment
Crytek89 Posted May 15, 2016 Author Report Share Posted May 15, 2016 Another update though: All the other parts are purchased: Water pump, Belts, Sensors, thermostat etc. Block is in the shop getting rebored with new pistons. Connecting rods are in, thankfully, good shape. Bearings are all getting installed and I have my grandfathers shop "booked" for mid-june for the swap! 1 Quote Link to comment
Crytek89 Posted May 21, 2016 Author Report Share Posted May 21, 2016 Few things remaining to purchase, hoping to get some insight on one of them. Clutch - looking at a 225mm Exedy stage 2 Rad/shroud - Still thinking on this one, but leaning towards a Mishimoto w/ a fan shroud. Fuel Pump - I believe it needs to be at least 32psi, no idea where to get one to fit the truck though.. Cold air intake - may have my friend weld me one up, still deciding. ARP head studs. Also found an RB20 single turbo for about $200 that I may pick up for use in the future. 1 Quote Link to comment
Lockleaf Posted May 21, 2016 Report Share Posted May 21, 2016 Clutch - Google "white bunny clutch" basically a d21 ka flywheel for 240mm Clutch surface with a z31? Turbo clutch and/or pressure plate. I dont recall the exact details. Radiator - stock will do pretty well for a good while, but mishimoto is good stuff. Fuel pump - look up fuel pressure on the z24i that came in 86 720s. If flow is sufficient, buy a fuel pump for that truck. But really, any inline fuel pump would be fine. CAI - a true cold air that pulls air from outside the engine bay might be worth the effort. ARP - great product, nothing wrong with using them at all 1 Quote Link to comment
Crytek89 Posted May 21, 2016 Author Report Share Posted May 21, 2016 Clutch - Google "white bunny clutch" basically a d21 ka flywheel for 240mm Clutch surface with a z31? Turbo clutch and/or pressure plate. I dont recall the exact details. Radiator - stock will do pretty well for a good while, but mishimoto is good stuff. Fuel pump - look up fuel pressure on the z24i that came in 86 720s. If flow is sufficient, buy a fuel pump for that truck. But really, any inline fuel pump would be fine. CAI - a true cold air that pulls air from outside the engine bay might be worth the effort. ARP - great product, nothing wrong with using them at all Yeah I saw some discussion on using a D21 Flywheel for the greater surface area - still have yet to decide what I'm gonna do there. Reason I'm wanting to replace the radiator is I plan on using electric fans and the rad is showing signs of aging - it's the original that came with the truck. Hm, I guess so.. I'll keep looking around and see what I can find. I plan to route the cold air from the intake manifold down the passenger side front fender area, I'll throw on a protector cover over the air filter itself, should be okay. 1 Quote Link to comment
Crytek89 Posted June 16, 2016 Author Report Share Posted June 16, 2016 New update! Block and Head are back from the shop finally. New pistons, re-bored, re-surfaced the block.. all that good stuff. Pics to come tomorrow when I'm back home, just have to paint the block and re-assembly can finally begin! 1 Quote Link to comment
BearForceOne Posted June 16, 2016 Report Share Posted June 16, 2016 Following, I plan on rebuilding a DET to swap in my 720 as well.Excited to see someone else doing it at the same time! 1 Quote Link to comment
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