Hello, I have a '99 TJ Wrangler w/4.0 engine. I am now in my third month - and just as many engines - with an on-going VERY expensive & frustrating experience with the Jasper company. Immediately after the installation, engine #1 ran for five minutes and then seized-up entirely (the oil pump/sump wasn't secured properly when they built the POS). Engine #2 had a VERY LOUD whining noise on acceleration from the get-go. The noise was loud enough that it really concerned me - in addition to being very obnoxious. The mechanics (two different ones) exhausted all possibilities for the noise: multiple smoke tests, vacuum leak tests, manifold replacements, throttle body, alternator, ruled-out all other belt driven accessories, you name it. The whine (really a SCREAM) was coming from inside the case somewhere. Anyway, I demanded another engine. Just found out from the second mechanic, engine #3 is just as noisy as engine #2, no change. I can't imagine the next 100K miles (if even that!) with an engine screaming at me the whole time. The Jasper engines are a wash. From much research I've done since, most of the other large engine remanufacturers really aren't much better in consistency and quality, so I don't want to take a gamble on any of them. My question to the forum is this: Could you recommend any good LOCAL rebuilders that are expert at rebuilding this type of engine? (1999 Wrangler TJ 4.0 I6). I live in the S.F. Bay area, but any good rebuilders on the U.S. west coast would be great to hear about as well. Really appreciate everyone's help and advice. Love to hear from you.