What are the differences between the LDK and LHU engines?
I've heard the Opel injectors are in the LDK and LHU. Is this true?
Any other notable differences?

My Cyl4 compression is @ 75 and looking to do an LHU swap

 

I don't think the LHU works. it has a spot for a PS pump so it uses a longer belt and I don't know if just taking it off and using a smaller belt works.

I also don't know if they're forged pistons with the same strength as the LNF or LDK.

 

the ldk has a vacuum pump, but that's deleted by zzp. also ldk doesn't have forged pistons either, its powdered metal pistons as far as iv heard, may be wrong. should be as strong or stronger than the forged in lnf.

 

OK, the LHU and LDK both have that vacuum pump on the end of exhaust camshaft. No big deal, I can make a block off plate for that. And the LHU also has PS pump which isn't a big deal either. The only thing I need to know for sure is

Are the LDK and LHU internals the same?

Also does the LHU already have "opel" injectors?

 

why would it have a ps pump? do they not have electric ps?

the internals are more than likely the same since they went to powdered metal internals after the lnf I believe. and I'm pretty sure if ur buying the new engine it doesn't come with injectors or rail. zzp ldk doesn't anyway

 

I'm not 100% sure it's a PS pump but from the pictures I've seen, its definitely a belt driven pump of some sort above the alternator.

I'm not buying a new one, I've found a 16k mile LHU at local salvage yard.
Calm down

 

If your buying a complete engine the ldk and lhu have a powersteering pump and they do not use electronic assisted steering like the cobalt and hhr.

I recommend to people to just use an lnf head as it. Bolts on with no issues and you dont need to run a block off plate or anything.

Zzp claims the motor will handle 500chp. Ive had them to 450whp without issues. Ive also had lnfs at that level without issues.

Both engines use powderforged intrrnals. Ldk injectors as far as i know are not the same as an lhu. The uk has different regulations and hence differences in the engines even if they are minimal. But i have not had the injectors flowed to verify.

My personal recommendation is if you need a replacement that doesnt require big power internals, is dont listen to slowbalt. He posts a lot of incorrect things. Use a ldk short block, lnf head, opel injectors and call it a day. Its the easiest solution.

 

Is the LHU engine you found cheap?

 

Not even worth it. Buy a new unused engine. You never know what lies within a junkyard or used engine

 

I can make a block off plate, that's no big deal. I planned on using the LHU head until I get the lnf head ported with cams, Springs, ect..
1500$

In most situations, I would agree but this is an LKQ salvage yard and engine only has 16k miles

The other reason is, it will eventually be getting rods, pistons, ect.. I just need to get it running again quickly so I can resume setting up trans build shop ect..

 

Lkq is hit or miss. Ive had junk motors come from them.

You never know with salvage cars. The motor will go right into yor hhr. You need to make a block off plate, remove the power steering and swap over your accesories. I cant remember if the alternator and ac are the same plugs. But the mounting and all that is the same.

 

Does it come with the turbo? If it does the manifold sits an inch higher then the lnf stuff.

 

I'm not sure yet. I hope so. These are more reasons I'm opting for a salvage motor rather than new short block. Newer/extra timing set, extra manifolds I can try porting, spare parts, it just seems like a better decision all around provided the motor is not a salvage yard dud like you mentioned

 

if that is a power steering pump, then just take it off and get lnf belt. ud just need a block off plate for the vacuum pump.

 

I use a different belt anyway because I removed AC. Haven't heard the belt slip once since I did that actually.

 

that you dont have to worry... if it infact comes out with the turbo like i s aid the lhu and ldk manifolds sit an inch higher then the lnf. In some cases its not to worry.

Your right about the components however i would just opt for a new top end kit with brand new timing components and what not. i dont deal with salvage motors anymore. i had a lsj come in and luckily i tried to rotate the motor before i stuck it in the car. the chain was snapped clean and guides were broken. the last and final straw was a rx8 rotary. no compression

 

So the LHU has a larger oil pan with more oil capacity and an oil sensor. Should I just use the LNF oil pan?

 

Why wouldn't you want the larger oil capacity? You just leave the sensor unplugged.

 

Idk space, oil cost, no good reason really. Takes 6.3qts I think

 

because you say stupid ass ****

 

Oil lasts longer. Not sure of the space in your car, but it fits mine no issues.

 

Lhu ldk oil pans fit the cobalt subframe without issues

 

How about the people harassing op in this thread lay off , if u Don't like what he is saying it can't be nice about it then move on.

 

I don't think anyone's harassing op...

 

I should've listened to you. Pick up that lhu today and it was seized. I was able to break it loose but that means they got water I the cylinders when they washed it. Smdh. I'm taking it back. No ******* way I'm using it now. Rusty rings, **** that. Time to send Jeff a msg.