Its New Engine Time
Engine (4.0) was slowly drinking my antifreeze so I tried the simplest thing I could, which was pulling the head (hoping it was just this) and having it remaned at a good machine shop. I replaced all the gaskets, cleaned everything top to bottom, torqued it all back to speck and no luck. After about 3 minutes it was knocking like crazy and shut down. Never overheated. Just sounded like someone was hammering on the sheet metal. I cranked it back up and it was slow to turn and sounded like metal on metal, and I limped it back into the garage. :nonono:
So, I need to get it going. Its not my DD so I have time to work with it.
I found this and am wondering if this is a REAL upgrade to a stock remanufactured, since I don't have $2900-$3900 to drop a Stroker in it.
Remanufactured High Performance Jeep 4.0 242 Engine | eBay
I'm pretty sure the 4.0L engines in all of the TJ's from the factory were H.O. so other than different cams it seems to be a stock 4.0L.
I was wondering about that... but wasn't sure. The compression ratio of a stock 4.0 is 8.8:1... I wonder what HP and torque gains I get from the increase to 9.25:1? For the additional $300 I get the strength/durability of the following Stroker components and get to choose my camshaft?
"The engine is built with the compression ratio set at 9.25 to 1 with the same valves, springs and retainers we use on our Stroker engines. We have several camshafts to choose from depending on the Jeep and how it's used"
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