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  #1  
Old June 4th, 2017, 12:54
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XJ LM7 5.3 swap

I decided to start this thread because it can help someone. I got a lot of inspiration from other's threads like from racer32, John D, PhotoJared, Frank Z, Jeff 98XJ WI, etc.. I would like to thank all the XJ LS swapers. Excuse my english.

My XJ is a 2001 sport. I put a M62 supercharger in it to get more power, but I was not very satisfied. Then I put a comp cam 232-4, piggyback ecu, wideband, headers but the results was poor for the effort. So I decided to go the LS route because I knew the engine from Corvette and I very like the V8 sound and torque production.

Now I am at the middle of the swap. (I hope).

This swap began in Feb 2017 when I got the package from ebay:


then I pulled the old engine out:


which one is better?


but when I took the old truck intake I got a bad feeling about the LM7 (156k miles) engine





and my frustration was bigger and bigger



the engine was full of carbon buildups


so I continued to the bottom end and without any surprise it was full of rust and carbon

the rod bearings destroyed
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  #2  
Old June 4th, 2017, 13:09
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Re: XJ LM7 5.3 swap

cleaning and rebuilding of the engine:


new exhaust valves




new valves seals


old springs, retainers cleaned


heads ready to instal


crank bearings left some marks on tha crankshaft


hope this will work



most engine parts ready


honing the cylinder


should be OK


assembling the bottom end



installing the oil temperature sensor for my VDO oil temp gauge




Jeep oil pressure sensor for the OEM jeep cluster


a little bit longer adapter for the Jeep coolant temp sensor


thanks Racer32 I bought the Camaro 99 headers
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  #3  
Old June 4th, 2017, 13:27
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Re: XJ LM7 5.3 swap

for the fuel delivery I decided to use the sending unit from the diesel XJ (has inlet and outlet without regulator) and combined it with the 4.0 fuel pump. regulator is GM on the rails



I bought the russel fuel lines and adapters:




lowered the truck fuel rail crossover line



some clearance issues with throttle body and water pump outlet. slighty bended and looks OK



test fitting of the intake hose with MAF


other VDO oil temp sensor for the 4L60e



engine and tranny together again


swapping the input gear and planetery gear from the NV246 to the NV231





for the VSS I reused the 37 teeth ring from NV246 and placed it into the NV231. I will then reprogram the ECU to count the 37 teeth (stock VSS is 40 teeth ring)



the GM VSS sensor adapted into the NV231



many thanks Racer32 for the adapter ring specs
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  #4  
Old June 4th, 2017, 14:18
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Re: XJ LM7 5.3 swap

Wow Peter looks great so far! Glad the adapter worked for you. Looking forward to more
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  #5  
Old June 4th, 2017, 14:20
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Re: XJ LM7 5.3 swap

end of May 2017 - LM7 first (hopefully last) install





transmission mount







engine mounts - I welded some universal LS mounts to the stock Jeep mounts









manifold to mount clearance - passanger side



manifold to mount clearance - driver side







Last edited by indian; June 4th, 2017 at 14:50.
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  #6  
Old June 4th, 2017, 17:23
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Re: XJ LM7 5.3 swap

yay for more lsxj's!

looks good
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  #7  
Old June 4th, 2017, 19:24
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Re: XJ LM7 5.3 swap

Looking good!
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  #8  
Old June 4th, 2017, 22:30
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Re: XJ LM7 5.3 swap

Nice! What color blue is your Jeep? Looks super cool. Also...I am a little jealous of your fuel line setup.
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  #9  
Old June 4th, 2017, 22:45
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Re: XJ LM7 5.3 swap

thanks guys!

clydefrog, the stock color was Patriot Blue Pearl but I repained it with raptor bedliner and mixed two blue RAL colors






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  #10  
Old June 4th, 2017, 23:47
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Re: XJ LM7 5.3 swap

I hope you replaced the knock sensors while you have the engine apart.
Apologies if I missed that.
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  #11  
Old June 4th, 2017, 23:51
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Re: XJ LM7 5.3 swap

Quote:
Originally Posted by Johnnie Walker View Post
I hope you replaced the knock sensors while you have the engine apart.
Apologies if I missed that.
nope, I reused the old ones. If they sucks I will then replace them. I will check them with HP tuners when tuning the ECU
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  #12  
Old June 5th, 2017, 23:38
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Re: XJ LM7 5.3 swap

modified jeep throttle cable bracket:







very custom modified jeep transmission cable bracket





I only grind the last detent and it shifts through all the gear without any problems



transfer case shifter linkage (it will be welded and painted)
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  #13  
Old June 9th, 2017, 14:28
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Re: XJ LM7 5.3 swap

Nice looking good!
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  #14  
Old June 9th, 2017, 18:12
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Re: XJ LM7 5.3 swap

Quote:
Originally Posted by indian View Post
nope, I reused the old ones. If they sucks I will then replace them. I will check them with HP tuners when tuning the ECU
If you have a problem do the harness too! It is very problematic with corrosion.

You're in Slovakia? That's gotta make it fun to get parts! Good looking build so far tho.
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  #15  
Old June 9th, 2017, 23:50
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Re: XJ LM7 5.3 swap

I checked the clearance between oil pan and front axle and I think I am very tight. the engine is too low. At full drop the steering stabilizer bolt hits the oil pan:


I made bigger bumpstops and cut the bolt:




oil pan to axle very tight at full drop:




other option is to buy a flat steel oil pan. or any other suggestions?

and with the parts to EU it is not a big problem except I have to wait longer and pay a import fees. yesterday I got a very nice package:
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