2008 5.7 engine swap help

metrod · Jan 30, 2017

I have gone through all of the forums looking for an answer to my question but no luck.

I have a 2008 ram with a 5.7 with high millage and the motor started knocking bad. I my garage on a stand is a 5.7 out of a 2005 with 16,000 miles on it. Can I use the short block on the 2008?
Any info would be greatly appreciated.

RonJon '06 · Jan 30, 2017

Yes, if your 08 is a 1500 then the only difference between the two short blocks is that the 05 doesn't have MDS. You'll either need to add MDS to the 05 or buy a tuner to delete it from your PCM. Welcome to RF.

metrod · Jan 31, 2017

Thanks for the info, I thought it would work but didn't want to start pulling the old one till I was sure.

RonJon '06 · Jan 31, 2017

You're welcome. I'm planning on swapping an 04 shot block into my 06 pretty soon but fortunately I don't have to deal with any MDS. Is there a reason you don't want to leave the heads on the donor engine? Easiest thing to do would be to drop in the long block and get a tuner.

metrod · Jan 31, 2017

Wasn't sure if the PCM would work without the MDS lifters. But if I can bypass the whole MDS system with a Tuner than that looks the way to go. Now I will do some research on Tuners. :happy107:

HemiLonestar · Jan 31, 2017

Just keep in mind, if you ever sell/trade in the truck, unless you send the tuner with it there will be a fault if the tuner is unmarried from the truck since the PCM won't have any inputs from the MDS. If you don't intend to, then go for it and enjoy!

metrod · Jan 31, 2017

Its my hunting and fishing truck and it will get drove into the ground. That's why I grabbed up the spare engine when I had the chance. But thanks for the info.

2008 5.7 engine swap help

metrod

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RonJon '06

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metrod

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RonJon '06

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metrod

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