5.7 vortec swap need help/advice

[4WDKC]

any updates?

 

[RonsSquares]

im curious how long the down time was im considering the swap also i have the whole truck available i have a 96 gmc im wanting to put the motor in an 82 gmc

 

[HotRodPC]

I'd say the down time depends more on your ability and time available for the project. Unfortunately it appears to be an old thread and these members rarely participate anymore so I'd think it's highly unlikely you'll get a response. Maybe best just to start your own build thread in the Under Construction section and there will be help around that will participate on a more current thread.

Welcome to GMSB though.

 

[Rusty Nail]

My advice is - DON'T DO IT!

 

[4WDKC]

im curious how long the down time was im considering the swap also i have the whole truck available i have a 96 gmc im wanting to put the motor in an 82 gmc

Its a lot of work to make the efi work in an older truck and honestly may not be worth it. The vortec 350 is notorious for intake gasket leaking coolant causing the the engine to run hot and crack the heads. So even if you can hear the engine run it may still have cracked heads that will need to be replaced. All the wiring and plumbing issues you will have to work out will be the same as going to a LS engine or big block, if youre going to do the swap make it worth your while.

 

[Camar068]

put the engine on an engine stand and clean up as much as you like. Then put it on an engine test stand, work through the wiring harness until it's a standalone harness and you can start it on the test stand. In other spare time, either install a rear gas tank under the bed and run new lines or add a pump to your existing tank. In tank is quieter than an inline by a lot.

Read, read, and read some more to make sure you didn't miss anything. Try to do as much prep work to both the truck and the engine as possible prior to actually yanking the engine out. That'll help cut down the "oh **** I forgot about that" moments.

Mine is on a daily driver that still runs, so I've been taking my time (sweet-ass time lol). I plan to take a week off work (mon-fri).....surely I can get it done in 9 days. If it's not in the truck running and on the way to the exhaust shop by say wednesday, I'll start worrying. Honestly, pending any major issues, I can see it being done by end of day Monday.

Below is the test stand I bought.

https://www.amazon.com/Goplus-1000l...=1522096996&sr=8-2&keywords=engine+test+stand

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[4WDKC]

Thats not a test stand that is a storage cradle , i have two with big blocks on them..I don't think I would start an engine on one of them, they are narrow and make it top heavy asking for it to jump and fall on its side or start barrel rolling on the floor. This is what a test stand looks like...excuse the ferd on it, see how the wheels are out further than the frame and engine mount locations that provides stability while that is running. It may not seem like it would matter but take a bicycle rim hold the axles vertically and have someone spin it, while its moving rotate it to horizontal position.

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[gpmorgan]

My son and I recently did just the opposite of what you are trying to do. Removed 5.7 vortec and replaced it with a carb'd 355. It is a 97 tahoe. We used the original trans, 4l60e.

 

[4WDKC]

My son and I recently did just the opposite of what you are trying to do. Removed 5.7 vortec and replaced it with a carb'd 355. It is a 97 tahoe. We used the original trans, 4l60e.

did you change the ecm to a tcm?

 

[Jrgunn5150]

So just got the seal and gasket kit is there any where I can get a how to convert 4wd to 2wd 4l60e. Step by step . If there is not I'll take it to a local transmission shop see if they can get it done. Just pay labor. And motor mounts about how much do they have to be moved toward. I can use the same mounts? Or have to get new ones for the 5.7 thanks


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It's a rebuild, any rebuild book or video will show how. Take literally everything out of the transmission, then starting with your new output put it all back in.

The mounts are the same, just use the factory mounts for your truck.

 

[gpmorgan]

We added a tps from tci that hooks up like a tv cable to the carb. Got a timing cover with the crank sensor provision and installed a single row timing chain. Everything else is still hooked up minus some of the engine (fuel) sensors. Changed fuel pump to tbi pump and run a bypass regulator.