Sohc Hc Piston Swap Ka24de

[dabum]

hey guys i'm going about doing the hc sohc piston swap in into my ka24de,

so far it sounds like a good idea but ive never done this with a motor still in the car.what i have so far is:

quickthinkup

Drop transmission (do i need to do this to get to the rear of the motor and pop the crank out of the last jounal, where therear main seal is?)remove crank pulliespull oilpannumber maincapspull crank w/rods as an assembly

that's so far for removal.

but for reinstallation

a is there any way to re install the piston and rods from underneath with the ring compressor other than doing it fromthe top so i dont have to pull the head. Also,what the hell should i set the ignition timing to i heard 20 btdc is goodwhats stock 18?

ANY EASIER WAY TO DO IT?

thanks alot any input

If theres been any write up on how to go about this or anything relating to this, can you post it.

again thank you very much for your help

[dabum]

Anyone??

[zac]

It would be a lot easier if you would pull the engine and have it on a stand. The engine and transmission are quite easy to pull out of the car. It would take twenty min. to split them and put it on an engine stand. But you can also do it in a car. I have not done a Sohc Hc Piston Swap but I have rebuilt a few motors. To take out the crankshaft-you have to have the transmission off-have the flywheel off-have the front crankshaft dempner off-have the rear main seal off-remove the front chain cover wich has the oil pump.-so you would have to have the pan and oil pick up off.-also you would have to have the valve cover off to get the front coveroff.-you would have to have the crank and cam at TDC on cylinder #1-you would have to have the chain off -now you should be able to start taking the crank out.

BUT I AM NOT SURE IF THE PISTONS COME OUT FROM THE BOTTOM.THEY MIGHT HAVE TO COME OUT FROM THE TOP!!

To install them I think they have to go through the top becuasewhen you put the band on to compress the rings, the band has to be mating with a surface completely all around so when you push the piston into the cylinder ; none of the rings will pop out.the top of the block is perfectly flat, thats why it's used. You can try and see if it can go through the bottom.As you can see this is alot of work and would be easier done on an engine stand.I hope any of this will help you.

[nickromeo]

but say if he just wants to swap the pistons, maybe he can pull the head off then unbolt the rod caps from underneath and push the piston and rod out the top,

his crank doesnt ever need to leave. the only reason i think that would need to happen would be to replace the main bearings....

also when doing this everytime i've seen this kind of work done, its always with new bearings.

would he need to replace his rod bearings i think that would be a super smart idea.

are the pistons floating pin, is he going to have to go to the machine shop and have the sohc pistons pressed into the rod?

ehrrrrrrrr. nismo power!

[zac]

taking the pistons from the top is the best way to go. but that also posses a problem. Now the head has to come off. AS soon as that happens you would have to unbolt the cam wich is attached to the chain. As soon as that chain skips,you are into a lot of work. Front cover will then have to come off. If you can lock the chain in place and be able to loosen the rod caps and remove the rods then you are laughing. But I think you would have to rotate the crank shaft a bit. ( don't quote me on that) Now if the main rod bearing has to be done, then that front cover probably has to come off. The only other way that I can think (and don't quote me on this) it's to undue all the main rod bearing caps and have the rear main seal off, lower the crank shaft as far as you can without taking the front cover and see if you can sneak the bearings out and in. Don't know if it would work but I have done that on different engines.

But my best suggestion would be to rebuild while your at it. New bearings, new head gasket, new timing cover gasket, new seals and the hc pistons. That's if you want to spend the money.it would guaranty you a solid block.

hope this helps.