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Old 11-13-2011, 03:48 PM   #1
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Question 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.

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

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Old 11-13-2011, 04:13 PM   #2
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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.

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Old 11-13-2011, 05:00 PM   #3
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Quote:
Originally Posted by Rubicon2 View Post
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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