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HEATON 04-17-2012 05:10 PM

LNF VS LDK Differences
Looking for the differences between the gm LNF 2.0 engine and the LDK 2.0 (A20NHT)
Thanks in advance...

ampzor350 04-17-2012 05:22 PM

HEATON 04-17-2012 05:30 PM


Originally Posted by ampzor350 (Post 6450400)

Thanks but looking for more engineering info like materials and specs......

ampzor350 04-17-2012 05:52 PM

Just curious but why do you want to know all that about the ldk? Dont take it the wrong way, I'm just wondering. I've never heard of the ldk engine so I guess I'm kinda intrigued

BlackLsCoupe 04-17-2012 06:07 PM

would be sick to get a LDK and LHU swaps going

ItalianJoe1 04-17-2012 06:19 PM

Materials and specs? It's the same thing with different pistons to bump the compression by .1 most likely.

Look up the piston part # for the two, see if they match. There could also be a slight cam difference, but since they are rated lower I'm guessing it isn't any use for an LNF anyway.

Why exactly do you want this info?

HEATON 04-17-2012 06:21 PM

Well I just bought a new in the crate 2.0 and was told it was an LNF but I ran the markings on the oil filter pad area and its a A20NHT .. From my research its not supposed to be here in North America???
Just looking for some specs on the differences...Thanks

ampzor350 04-17-2012 06:27 PM

Yeah I read it was from the early 70's and made it way to the us in 82 and lasted until 1990 but it wasn't a direct injection motor. They had a turbo charged one that was called the LT3.

ampzor350 04-17-2012 06:38 PM

Manufacturer code: A20NHT (2.0)
Year of production: *
Fuel: gasoline
Fuel preparation: *
Supercharging: Turbo charger*
Camming: DOHC*
Cubic capacity: 1998
No. of cylinders / Arrangement: 4 / In-Line*
Valves no.: 16
Compression ration: 9.3 : 1*
Performance [kW] / RPM: 162 (220 PS) @ 5300
Torque [Nm] / RPM: 350 @ 2000 **** (~ 258 ft/lb)
Bore x Stroke [mm]: 86 x 86*
Note Insignia Toč.moment: 350Nm od 2000 - 4000 ot./min

gone_in_10_sec 04-22-2012 07:51 PM

HEATON, anywhere on the part's label or crate box does it say GMPTEPNY or GMPTENY or GMPTE?

if so, you my friend are one of the lucky SOB in the US, who has a US spec LNF motor with a European spec block.. the casting on this block is 3x better than the original LNF casting.. you are one lucky dude!!

Since last march the GM Powertrain Tonawanda Engine Plant in Tonawanda, NY released US spec LNF engines with a Euro spec block either for consumer purchase and warranty work.. because GM retooled the ECOtec production line for the LHU, LDK and other ECOtec [US/SA/EURO/SEA] engines as well..

Since then, all US spec LNF engines will have the Euro spec block in them.. I'll lov to have one but at $3600 for new engine.. maybe down the road if my current engine takes a dump.. :lol::lol::lol:

HEATON 04-22-2012 08:39 PM

PM sent...

jarhead 04-22-2012 08:49 PM

PM sent from me also. I have had the LDK engine in my car since last fall thanks for the info! Sounds like a win win for those that had porous cracked blocks like I did! The sand casted block,sleeved girdled pistons and other differences valve cover/ oil pan/ pistons/ rods/ block/ girdle and head are different and better IMO.

gone_in_10_sec 04-23-2012 01:38 PM

since my PM box got blown up in the last few days..

FYI: Since last year - GM stop making the original LNF block to cut tooling cost, it cost money to keep the casting tools/block to produce the LNF block, so GM decided to stop producing the original 2nd Gen LNF block and use the 3rd Gen LHU/LDK block instead for new LNF engine production, since the 1st [LSJ/2.0] & 2nd [LNF/2.0] Gen block is almost the same block as the 3rd [LHU/LDK-2.0] Gen block but with better casting materials and an improved engineering design [since there is known/documented porous [LSJ/LNF] blocks out there].. any LNF engine produced since August 2011 are now using the LHU/LDK [3rd gen] block..

IMO up to now the 3rd Gen block is the best made ECOtec block since the engine platform was created in early 2k' but I'm thinking the 4th gen block that comes out in fall 2013 may top the list with a newly designed DI head for better flowing head design for the use with the Flexfuel program..

the difference between the "new" LNF and the LHU/LDK is: valve cover/ oil pan/ pistons/ rods/ block/ girdle and head.. everything else is pretty much the same..

There are many LHU/LDK hybrid engines built as a LNF, I have already seen two examples that have come into the shop for warranty engine replacements, they were confirmed made in NY but some techs have reported they have seen blocks labeled /stamped with "Made in Mexico or UK or Germany", b/c the ECOtec blocks are currently made 5 countries keep cost down..

raver0789 04-24-2012 06:20 AM

Interesting find.

shabodah 04-24-2012 10:29 AM

Word at GM training is that the LUK (88mm bore) used in the 2013 Malibu Hybrid has the 4th gen block, but not the revised head. The belt/alternator/starter (BAS) system puts more strain on the mains so they are further reinforced from the LAF (88mm bore) and LDK/LHU (86mm bore)

I'm still wondering what's going on with the engine in the ATS, as it is still called an ecotec, but, is not looking like it is the same engine family, and this new family may replace the older one in time, reducing the ability for us to use newer, better parts in older applications (ie the fourth gen block and head may be lower volume than you'd think).

HEATON 04-28-2012 04:22 PM

Thanks for the good info . Looks like the engine as a 2.0 LDK. It has been run but no marks on the belt tensioner. Every part number or casting number I run comes up for a Opal Insignia? Even the turbo manifold casting number is different than the LNF.
Not sure what I'm going to do with it. I do not need it right now.....

jarhead 04-29-2012 04:46 AM


Originally Posted by HEATON (Post 6467956)
Thanks for the good info . Looks like the engine as a 2.0 LDK. It has been run but no marks on the belt tensioner. Every part number or casting number I run comes up for a Opal Insignia? Even the turbo manifold casting number is different than the LNF.
Not sure what I'm going to do with it. I do not need it right now.....

The LDK/LHU used in Europe or USA in vehicles such as the Opel Insignia,Saab 9-5,Buick Regal turbo with the 220 hp have a 6.3 qt oil capacity. If the engine is a LNF made after march 2011 installed August 2012 or later as replacements engines built with the LDK gen 3 stronger block it will still have the 5.0 qt capacity same as the gen 2 block LNF does. Maybe this will help you not sure you want to add or drain oil in you're crate engine though to check it.

MajorLazerz 06-19-2014 04:50 PM

are lnf and ldk parts compatible?

raver0789 06-19-2014 05:06 PM

I believe so minus the oil pan. I'm pretty sure of that. Think the LDK takes more/less oil. The exact amount i do not know. But the heads etc are the same. Piston design is the same except compression in the ldk is 9.3 to 1 not 9.2 to 1 like the lnf.

thatzthastuff 06-19-2014 05:32 PM

From ZZP--

A European high-performance version of the LNF with 9.3:1 compression. This engine is also known as A20NFT and A20NHT by GM Powertrain Europe. The LDK engine uses a Gen 3 block, larger oil pan, higher compression pistons, and several enhancements over the LNF. In it's stock form it makes ~10 more HP than the LNF but can handle up to 500WHP.
This LDK engine will bolt in an LNF car. If this is the route you are going, please select in option 2 so we can set it up properly for your application before shipping.

*Comes as pictured unless you select changes via drop down menu. Complete engine valve cover to oil pan. No intake manifold or fuel rail. The turbo assembly is optional.
You can simply bolt on your factory intake manifold, throttlebody, and fuel rail.

The LNF engine is a foam cast Gen2 block which is known to fail during high horsepower, GM called this a "porous" block, truth is that they tried to improve the cooling system by removing aluminum material from inside the block. The LNF engine is 9.2:1 compression.
This LDK engine will bolt in an LNF car with minimal mo
This is a brand new motor fully assembled from GM Europe. We can modify it for additional costs.
In stock form it makes approximately 10 more HP with the same boost level (using stock turbo) due to higher compression, economy is also improved. Premium fuel required.

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