5.3 in a JK - JeepForum.com
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post #1 of 88 Old 07-10-2011, 10:35 AM Thread Starter
JJ-4
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5.3 in a JK

Well after blowing up my 3.8 I decided it was time to add a little bit of power to the JK. I didn't want to spend the money on a Hemi swap so I ended up getting a 5.3 with tranny computer wiring harness and DBW pedal for 1600. I will try my best to keep this thread updated with pics and other info as I progress with the swap. Here are some pics of the engine mounted in the Jeep.

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87 YJ, 07 JK 5.3 Vortec

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post #2 of 88 Old 07-10-2011, 10:43 AM Thread Starter
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I will be using the stock JK fuel pump which will be capable enough for this engine .

My motor mounts are from Todd at Jeep Speed Shop

I'm gonna try and see if I can figure out a way to use the stock 5.3 power steering pump but will probably end up getting a new one from PSC.

I will have a functioning a/c unit

I'm still debating where I want to connect the steam vent line at.

The factory coolant temp sensor will probably be reused so my temp gauge will still work

The only issue that we are trying to work out is gonna be the tach. I might be running without one while JeepSpeedShop is trying to work out a way for it to function properly.

87 YJ, 07 JK 5.3 Vortec

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post #3 of 88 Old 07-10-2011, 11:02 AM
Prot
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What kind of vehicle did that 5.3L engine come out of? How did you blow up your 3.8L?

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post #4 of 88 Old 07-10-2011, 11:05 AM
superbee24
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subscribed . interested to see how this turns out ! Back to the ol' days when V8 Chevys were regularly dropped into Jeeps
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post #5 of 88 Old 07-10-2011, 11:09 AM
Charles
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It would be sweet if someone would post a step by step write up of this with all of the needed part numbers.
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post #6 of 88 Old 07-10-2011, 11:14 AM Thread Starter
JJ-4
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I had lost oil pressure in the 3.8 then spun the bearings. I had just checked the oil the day before when I went on a couple hundred mile trip and everything was fine.

I'm trying to make this smog legal so it will be a big headache. I got the engine/ trans from a 2007 chevy 1500 pickup. I will try and add the needed info for this swap as I go along and once finished and everything working properly I will go into all the details that would help everyone who wants to do this

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post #7 of 88 Old 07-10-2011, 12:39 PM
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Quote:
Originally Posted by JJ-4 View Post
I had lost oil pressure in the 3.8 then spun the bearings. I had just checked the oil the day before when I went on a couple hundred mile trip and everything was fine.

I'm trying to make this smog legal so it will be a big headache. I got the engine/ trans from a 2007 chevy 1500 pickup. I will try and add the needed info for this swap as I go along and once finished and everything working properly I will go into all the details that would help everyone who wants to do this
PLEASE do!

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post #8 of 88 Old 07-11-2011, 06:27 AM
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post #9 of 88 Old 07-11-2011, 07:26 AM
lamar95x4
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JSS is also doing a swap on their "cheap" project guinea pig. Cadillac for the 6.2L/6L80Trans. Looking forward to your info as it develops!

Mike
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post #10 of 88 Old 07-11-2011, 08:46 AM
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Hi I'm Robbie from MoTech, we have been running 5.3's in JK's for over a year now.

Insturment panal (including tach), cruise control, HVAC, etc.. are all functional. You may also be interested in hydraulic motor mounts if you run AFM.

If I can be of any assistance please contact me.

Thanks Robbie.
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post #11 of 88 Old 07-11-2011, 11:58 AM
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Quote:
Originally Posted by JJ-4 View Post
I had lost oil pressure in the 3.8 then spun the bearings. I had just checked the oil the day before when I went on a couple hundred mile trip and everything was fine.

I'm trying to make this smog legal so it will be a big headache. I got the engine/ trans from a 2007 chevy 1500 pickup. I will try and add the needed info for this swap as I go along and once finished and everything working properly I will go into all the details that would help everyone who wants to do this
What would it take to get it smog legal? Couldn't you just get some really 'hot' cats kind of like the ones that come on the JK stock? Or would it take more?
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post #12 of 88 Old 07-11-2011, 09:14 PM
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What would it take to get it smog legal? Couldn't you just get some really 'hot' cats kind of like the ones that come on the JK stock? Or would it take more?
The problem is California laws. All aftermarket modifications must be approved by California Air Resources Board (CARB). All vehicles must conform to California Emissions laws to be legally registered on base. Smog checks by state certified/regulated check points have to be done every time you have to renew your tags. If your emissions equipment does not have approved serial numbers it doesn't pass.

Mike
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post #13 of 88 Old 07-11-2011, 09:51 PM
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Subscribed! Looking forward to this write up...

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post #14 of 88 Old 07-11-2011, 11:36 PM
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Subscribed! Looking forward to this write up...
^^^ what he said
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post #15 of 88 Old 07-12-2011, 12:14 PM
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Typical, California needs to be difficult. ****ty state. Sorry I hate all the laws that Cali has. But project looks great. I cant wait until the MBRP team finishes their 5.9L diesel project. Or some company needs to make a complete Diesel conversion kit! Sick and tired of getting 9mpg city with my JK. And no before someone tells me "you didnt buy a JK for good gas mileage" but even getting 17-19 highway and 10-13mpg city would be great!!!
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