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Italian Tune Up on 3.7L--Catastrophic or Beneificial?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=3&t=89941		 Page 1 of 1
Author:  Burro II [ Thu Apr 18, 2019 12:49 am ]
Post subject:  Italian Tune Up on 3.7L--Catastrophic or Beneificial?
Have you done an Italian Tune Up on your 3.7L? Did it help, or did you destroy it?

Share your experience. But please omit speculation and caution from the sidelines. I am trying to assemble some real data here from Jeep owners.

Thanks.
Author:  RussB [ Wed Jun 26, 2019 4:25 pm ]
Post subject:  Re: Italian Tune Up on 3.7L--Catastrophic or Beneificial?
I did when I first got my KJ, but that was to make sure it ran well and was strong, not to blow out carbon. I haven't done one since. My 3.7 is still running strong. Modern fuel blends and oil go a long way.

The only vehicles I knew that actually benefit from the old "Italian Tune-Up" are ones with carbs or from a time of crappy gas and oil. A can of Seafoam or similar will clear out the carbon without having to dog your engine and driveline at redline. Now for a direct injection gas vehicle motor it might be of some benefit to clean those intake valves since they get no fuel spray. But for a 3.7 that is fuel injected and uses (I assume) decent oil that is changed regularly, then the Italian tune up is pointless. Even short trips aren't a problem since motors warm up fast and use lots of detergents in the oil. This technique is from a bygone era for bygone vehicles.

Check Bob Is The Oil Guy (BITOG) forums on Italian tune-ups and things like that.
Author:  sota [ Thu Jun 27, 2019 11:26 pm ]
Post subject:  Re: Italian Tune Up on 3.7L--Catastrophic or Beneificial?
seafoam + italian tune up == many lost HPs returning.
Author:  RussB [ Fri Jun 28, 2019 8:51 am ]
Post subject:  Re: Italian Tune Up on 3.7L--Catastrophic or Beneificial?
Just be careful about cleaning additives on old unknown vehicles. Sometimes that gunk is strategically sealing something up. After I did some Seafoam in my Cherokee the rings got even worse, and I could fill a 10oz oil catch can in about three days with the blow-by. A can of Restore helped a little.
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