Motor first, Datto later. Izzo Jr at it again.

[Janksun]

Hmm where should I start?

Craigslist maybe.

Ka24e $300

Eh a little too much.

How about $200?

Deal.

So I got a ka24e all taken apart, supposedly with a rebuilt head, 3 cp pistons lost the 4th??, turbo manifold, and a bunch of mumbo jumbo.

Enough with the bullshit, on with the pics

 

Block

 

 

 

 

 

Apparently the block was tapped for the oil cooler

 

 

 

"rebuilt" head and intake shit

 

 

 

Harness

 

Flywheel

 

 

Dizzy

 

 

Oil adapter

 

 

Pistons and rods

 

 

Computer

 

 

Crank

 

 

Turbo manifold

This thing is a beast!!

 

 

 

 

Timing cover

 

 

 

Valve cover

 

 

 

And this thing idk the technical term so I'm going to call it the crank journal??

 

 

 

 

 

If anybody wants the pistons and the turbo manifold make me an offer or trade me 4 stock pistons and rods. I don't want to set this up as a turbo motor.

 

First step I think I'm going to send the block to be hot tanked. Then do a home honing job. Find all the bits and pieces and "rebuild" it. Any suggestions or ideas feel free to post them here!

[MicroMachinery]

They call that the crank "girdle".

[datzenmike]

 

This is more likely the oil return from the turbo. It's also on the wrong side for an oil cooler. An oil cooler would be after the pump but before the filter on the pressure side.

 

 

 

Can you post better pictures of these? I have a set but these look funny. Maybe just the camera?

 

As for honing the block I would seriously think about a re-bore and go to the next over size pistons. This is/was a turbo motor and has been beaten on pretty badly. The bores are worn for sure but how much? and is it worth it to get just a few more miles out of it? New pistons would mean a new motor to start with. rebuilt head? look at it, it's used and no way to tell.

 

My guess is this is a blown up KA just being sold off. If worth anything would he have left it outside to rust for a year? $200 is fine for a rebuildable core but rebuild it, not a 'hone and go' motor.

[Janksun]

 

This is more likely the oil return from the turbo. It's also on the wrong side for an oil cooler. An oil cooler would be after the pump but before the filter on the pressure side.

 

 

 

Can you post better pictures of these? I have a set but these look funny. Maybe just the camera?

 

As for honing the block I would seriously think about a re-bore and go to the next over size pistons. This is/was a turbo motor and has been beaten on pretty badly. The bores are worn for sure but how much? and is it worth it to get just a few more miles out of it? New pistons would mean a new motor to start with. rebuilt head? look at it, it's used and no way to tell.

 

My guess is this is a blown up KA just being sold off. If worth anything would he have left it outside to rust for a year? $200 is fine for a rebuildable core but rebuild it, not a 'hone and go' motor.

Yeah the more I looked at this motor after I got it home I realized that it's going to take a rebuild, which is probably the route I will go over time. I'm going to clean it up and see what's really there.

 

I'll take some more pictures of the pistons and rods when I get home today. They don't seem to have any markings on them to tell what they are.

 

I may end up just parting the stuff out. Make my money back.

[datzenmike]

The crank looks funny in one picture but normal in the other. The pistons seem to have little to no skirt on them but are probably right. The picture seems to be shortened somehow. The KA-E pistons have a small 2.8cc dish almost nothing really. The first 3 months of production of the S13 saw slightly domed KA pistons used. The stock compression was 9:1 later dropping to 8.5. I was just wondering if those were the domed pistons.

[Janksun]

Alright I took a few more pics.

 

 

 

[datzenmike]

Holly shit!!!!!

Here are '89 S13 KA24E pistons. I took them out of the KA block myself... Note the small 2.8cc dish

 

Measure the diameter across the top. Should be 89mm but maybe they are already over size. A dish like that reminds me of Z24 pistons. They will fit and work perfectly in a KA24E motor. Definitely would lower the compression though.

 

 

 

 

Take a picture of the under sides. Maybe these are low compression forged pistons.

[Janksun]

I don't have the proper tools to measure to the exact mm but just based off a simple ruler it came out to 87.3125

 

Here pics of the underside

 

 

 

 

[datzenmike]

Forged. You get all 4 of them?

[Janksun]

No the guy "lost" the 4th and seeing his house I can understand why. Im going to get the block bored so I'm going to get new pistons anyways. I need to find another connecting rod too...

[Janksun]

They look like these

http://www.frsport.com/299-Nissan-KA24DE-w-Turbo-89-0mm-9-1_p_9568.html?gclid=CIK_9-Pw3bkCFWuCQgod5wgAoA

[datzenmike]

Looks like them but certainly NOT 9 to one compression. The ones I have pictured are 8.5.

[Janksun]

Oh well since there's only three of them they're kinda useless. The cylinder walls don't really look that bad, why wouldn't I be able to do just a hone and call it good? There isn't really any scoring, just some surface rust

[datzenmike]

Not saying you can't. The cylinder wall to piston clearance is usually between 1 and 1.8 thousandth of an inch for stock pistons. Not much but if too worn the rings won't seal as well and although it may not burn oil it will be 'tired' like a high mileage motor. However on forged pistons the aluminum alloy is purer and the clearance is much wider to allow for heat expansion. This is likely why you measured over 87mm on the pistons. Again if too worn the same thing applies.

[Janksun]

Gotcha. So I'm best just going with a rebuild anyways. So when I go to the machine shop, what do I tell them? Just to bore .20 over what stock would be? Should I take crank and rods in too?

 

On another note, are the KA out of a d21 and the s13 pretty much the same? I need another connecting rod so I was looking at going to pull one from a d21 in a jy.

 

I'm trying to rebuild this motor kinda on a budget.

[datzenmike]

The S13 motor had floating piston pins and the rod small end has an oil hole on the top and a bronze bushing in the small end. The piston pin is held in with C clips on each side. The piston, pin and rod can be taken apart by hand. D-21 pins are pressed into the rod so they are different.

 

I'll assume this KA has a stock bore and the forged pistons are properly undersize so that no machining is needed to run them. You will have to measure the bores for wear on that block and decide if you can get a slight over size set of stock pistons and bore the block accordingly to fit them.

[Janksun]

Bore on the block seems to be a little over 89mm. I see rebuild kits on eBay and you can get I think .20 over pistons and rings.

[Janksun]

Seen here

http://bit.ly/12z4yPO

[datzenmike]

 

Do these have C clips in each end to hold the piston pin in? Can't see.

 

If they do take apart and the rod ends should have an oil hole on the top.

[mcmlxxxv]

they look like CP pistons to me an they make only 2 models for the KA24.

 

you can buy only one piston from them , could be worth it IMO

 

part number I found look much like the one you have , sould check them out ;)

 

CP number : sc7299 (89mm bore) sc7300 (89.5mm bore)

[datzenmike]

The missing forged turbo piston is probably 'blowd up'

[Janksun]

they look like CP pistons to me an they make only 2 models for the KA24.

 

you can buy only one piston from them , could be worth it IMO

 

part number I found look much like the one you have , sould check them out ;)

 

CP number : sc7299 (89mm bore) sc7300 (89.5mm bore)

Where did you see that they sell only one piston? I can't find that anywhere.

 

Mike, I took the c clip out and pushed the piston pin out, and this is what I found.

 

 

 

 

^^ looks like a part number 7H-25BP CP

 

 

 

 

 

My guess is the same, the missing one is probably blown up

[datzenmike]

Yes those look like S13 rods with bronze bushing and oil hole. I suppose you are missing a rod then along with the piston? If you have all four rods you just need new stock pistons. Probably over size.

[mcmlxxxv]

Where did you see that they sell only one piston? I can't find that anywhere.

 

 

 

you need to email them and make a custom order to have only one and not a set , but they do that :)

[Janksun]

you need to email them and make a custom order to have only one and not a set , but they do that :)

Ok cool thanks!