1075 Kit Questions

So I picked up a new set of cylinder jugs all bored and honed for the 1075 with pistons and everything i need. I am about to put the jugs on but noticed the markings on it are 1.015 instead of 998 like the original cylinders that came off. Is this the different model jugs? I have no idea how to put the front cam chain guide in and now im pretty worried. Do I have the wrong set of jugs? How do I get the front cam chain guide in? Real real concerned now, looking for some quick answers as i have a couple friends over to help today and now we are puzzled. thank you

if they are the wrong jugs, can i make them work or is it completely wrong and unsalvagable?

They are the wrong kind, trying to figure out how to fix now

It's cheaper for them to take a 1015 block and bore to 1075. They don't have to put new sleeves in which run about 60.00 a piece I believe. I would think you have the right block.

Of course I have no engine building skills whatsoever.

freebyrd24 wrote:

So I picked up a new set of cylinder jugs all bored and honed for the 1075 with pistons and everything i need. I am about to put the jugs on but noticed the markings on it are 1.015 instead of 998 like the original cylinders that came off. Is this the different model jugs? I have no idea how to put the front cam chain guide in and now im pretty worried. Do I have the wrong set of jugs? How do I get the front cam chain guide in? Real real concerned now, looking for some quick answers as i have a couple friends over to help today and now we are puzzled. thank you

if they are the wrong jugs, can i make them work or is it completely wrong and unsalvagable?

Well, ... The J motor 998 and Z motor 1015 are different for sure. The z guys take the J heads and mate them to the z blocks as they can mate them to higher compression pistons and lower the compression by one point but more so because the j motor head I think has slightly bigger valves but it breaths better and you would have to buy an adapter kit which requires some modification to head. I say go to www.kzzone.com and have a look see. You can call the techs. Jay would know the best route for sure.

But I would be banking on the talking to whoever sold you them and seeing about getting another block or having yours bored to 1015 if it is possible as you will spend money on the adapter kit which I assume that you are looking to save money right?

If the block that came off of the motor says 998, you have a J motor. The block with 1015 is the older KZ1000. Will not fit your J motor. If the pistons came with the 1015 block, they are wrong too.

So I do have a J motor? It's out of a 1981 LTD k1. I was under the impression that it was not. So do you think that the pistons that came with my 1015 block are incorrect too? I have a 1075 kit that was made from the 1015 block. Are the pistons different if I get a 1075 kit on a 998 block? As much information as possible would be excellent as I am a little confused now on this one. I thought I had this all straightened out what motor and whatnot but now I'm in doubt. Thank you for all of the replies.

I can tell you for sure Yes you do have a J motor. The blocks all said 998 on them. The z blocks say 1015 but they have different mounts for the timing chain. Alas why when you had her apart you couldn't figure out how to put it back together. And yes I would assume that if the pistons are for the 1015 it's because the pins probably are a different diameter and thus won't fit your rods. I am assuming that Jay said that for a reason. Although I have no experience with the J motor I think the connecting rods must be different diameters for the wristpins. Im not for sure I am giving an educated guess but I know the j head put on a z motor will work but it drops the compression a whole point so I assume the the 1015 piston is maybe not as tall as the j pistons are or the stroke may be different. The pistons all have different shapes maybe even if the wristpins were the same which I think they maybe larger the piston may hit the valves or something.
Jay has an explanation of the differences of the compatibility between the j and the z so check his site out and read the article it may help you. I am a noob myself. I have torn my engine down with the supervision of a pro who has done this all his life and really knows his stuff. I could ask him if no one else gets back to you before that.

If the pistons are for a KZ motor, the pin is too high in them to use with the short J rod. They would sit a millimeter down in the hole, Plus the dome volume is also low.

Well this is going to be a huge problem. Does anyone need or know anybody that wants a 1015/1075 set of cylinders complete with new wiseco pistons, rings, pins and retainers, base gasket and head gasket? Please spread the word on this, as I cannot get the 1075 cylinders for the 998 from this company unless I can move the 1015/1075 setup I have. PLEASE PM me if interested at all!! Really need help thank you

Hey everyone sorry for the delays and panic and confusion. I had a very bad experience with this place...

www.overstockpartsgalore.com/engine1007.html

I think it was Keith that said he also had a bad experience at first with this place as well until they finally got it right. They did not clarify which motor they used the block from, unless I was mistaken, and I recieved the 1015 cylinder for my 998. They wouldn't exchange it for a 998 though they said they could do the 998 if I bought another one from them for full price. I can understand thought that they are a low buck place and can't afford to stock the 1015/1075 kit, but that didn't help my situation.

I finally sold the 1015 one and then reluctantly tried to e-mail them again and get a 998 kit but they refused to answer multiple e-mails.

If they get it right, it seems to be an okay place with a decent product. But if not your in for a world of hassle and issue until they do get it right. But I think once they do its okay.

Just sharing my experience. Maybe it was me, but just thought I'd put it out there.

I called around to some machine shops and found some pretty good deals surprisingly! So I just ordered a 1075 piston kit and it is on its way! I'm very excited!

freebyrd24 wrote:

Hey everyone sorry for the delays and panic and confusion. I had a very bad experience with this place...

www.overstockpartsgalore.com/engine1007.html

I think it was Keith that said he also had a bad experience at first with this place as well until they finally got it right. They did not clarify which motor they used the block from, unless I was mistaken, and I recieved the 1015 cylinder for my 998. They wouldn't exchange it for a 998 though they said they could do the 998 if I bought another one from them for full price. I can understand thought that they are a low buck place and can't afford to stock the 1015/1075 kit, but that didn't help my situation.

I finally sold the 1015 one and then reluctantly tried to e-mail them again and get a 998 kit but they refused to answer multiple e-mails.

If they get it right, it seems to be an okay place with a decent product. But if not your in for a world of hassle and issue until they do get it right. But I think once they do its okay.

Just sharing my experience. Maybe it was me, but just thought I'd put it out there.

I called around to some machine shops and found some pretty good deals surprisingly! So I just ordered a 1075 piston kit and it is on its way! I'm very excited!

i think it was old man rock that had a problem there,but i could be mistaken...

Nope, not mistaken..... And during the engine build itself, found the decking was more than advertised 10,000... More like 18,000 of an inch and that's why I had to go with doubled cylinder base gasket size....

Let's see, oh that's right...
MRE does their machining!!

Ah well, Tony bought one of their kits as well and had no problems...

Same time, it's a good deal where I had to obtain a clean (no broken fins) cylinder as it was so frustrating oh most definitely... but now that's it finished and since I've run into head aches with every single purchase from a Florida web based supplier (not joking, everyone of them) it just seems to be the way it is these days...

OMR