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Chevy Colorado 2.8L I4 LK5 Swap

183K views 849 replies 56 participants last post by  wrench459 (R.I.P.)  
#1 · (Edited by Moderator)
Looking for a new motor for my Kadett.. I considered a lot of motors, and was leaning towards the 2.2L Opel motor.. Then I came across this motor.

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The straight-4 LK5 engine is sold as the Vortec 2800 in GM trucks. Like its Atlas brothers, the LK5 has dual overhead cams, and shares their 93 mm (3.7 in) bore and 102 mm (4 in) stroke. The LK5 displaces 2.8 L (2770 cc, 169 cu in) and produces 175 hp (131 kW) at 5600 rpm and 185 ft·lbf (251 N·m) at 2800 rpm.[2] Engine redline is 6300 rpm.

It is used in the following vehicles:

2004-2006 Chevrolet Colorado
2004-2006 GMC Canyon
2006 Isuzu i-Series

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Dimensionally its almost a dead match for the Opel CIH motor. But it is a bit higher due to the Air Flow Meter and CIH on top of the motor. Motor mounts are in the same location.. width is about the same as is length.. etc.. The oil pan is similar to the Opel with a rear sump pan.

Best thing its cost complete is under $800 with low mileage at Car-Part.com--Used Auto Parts Market and for about $400 my guy that builds the LS harnesses I sell. Can modify the harness and reprogram the computer making that part of the job easy.

I did look at the I-5 (By the way tends to be CHEAPER.. more of them out there)

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The L52 (also called Vortec 3500), is a straight-5 truck engine. It displaces 3.5 L (3,460 cc/211 cu in), with a 93 mm (3.7 in) bore and 102 mm (4 in) stroke, and shares much with the rest of the Atlas family. Dynoed at the flywheel it produces 220 hp (164 kW) at 5600 rpm and 225 ft·lbf (305 N·m) at 2800 rpm, while producing 179.13 hp at 6001 rpm when dynoed at the rear wheels. Engine redline is 6300 rpm.

It is used in the following vehicles:

2002 Chevrolet Bel Air concept
2004-2006 Chevrolet Colorado
2004-2006 GMC Canyon
2006 Isuzu i-Series
2006 Hummer H3
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Its 6 inches longer.. which MAY fit a Manta.. but it doubtful it will fit my Kadett..

I will keep you all informed. Once my GTO goes next weekend I will be getting the motor and starting on the swap.
 

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#841 ·
When I saw your post of wanting to sell this I had to read it twice, not believing it the first time. Although I appreciate the work that has gone into the project by everyone involved, I'm not sure you will find someone else that would appreciate the car itself as much as you do Charles.
 
#842 ·
Thanks everyone, and I do understand a lot of what you all say.

The Bitter originally left due to space, new car (My first GTO) and it was no longer a reliable daily driver and I needed the cash.. Now it no longer has to be a daily driver, and although I could use the cash.. I hate to see it die. But it still brings up a space issue.

Also I am a bit more adept at some things than I was a decade ago and have a lift and more tools to work with.

That said, currently its leaning towards the Manta will be stripped of its NOS parts, and have them replaced with whats on Bens car, which are nice.. just not NOS. Ben's Manta will get re-restored by my son in the future.

I will get the heater / Defrost and such working on the Manta, fix the fan issue ( Currently its on-off manually), and it will be Davids car. Because as everyone noted.. only I and David would probably appreciate it. Then the space issue may not be as big of one.

The REAL issue will be when the Bitter gets home. The Kadett will fit in the storage building.. but will the Bitter fit in my garage ? If memory serves it does, but its REAL tight. I think I had it in the garage during hurricane Isabel. But it was catty-cornered into there.

Anyway.. this was more to see what people thought than a concerted effort to sell it.
 
#847 ·
Well yes moving to a place with a 6 car garage and a small house attached would be preferred.. but my wife would have to agree.. I have been considering going out the country and buying an abandoned garage. One of those old 2 pump a couple of garage bays, sink and small office.. :) I could then make it the EZ2Wire office and write it all off..
 
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#849 ·
Funny how things change..

A quick Update..

Atlas was stripped of the NOS parts as they were sold to a guy locally that is rebuilding his Manta to showroom.

Overheating issue solved we think.. the thermostat housing was leaking. But the motor still tough as nails.



It's still driving and running around and will be at the National Meet in Carlisle with its new Owner. His new owner is Matt Jones, a young mechanic friend of mine that helped with the Murphy project. I gave it to him as a gift, also then he has to store it ( The storage issue is something that has not changed ) and he can't sell it either :) Oh I get to still autocross it when I have time.

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He is thinking of switching to a Manual transmission. I think getting the Automatic tuned better via computer would be the better option. We will see.

He plans on doing the interior, and wants to get it painted and fixed up.

I have used it as halloween decoration the last few years :)

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