Aluminum Cylinder Head Jeep 4.0 Liter L6 Hesco on 2040-parts.com
Houston, Texas, United States
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This 4.0 Liter Aluminum Cylinder Head was used on a restoration of a 1993 Jeep Wrangler with a 4.2 block. The restoration was done in 2006. It was run on this engine for 15,400 miles. I had a problem with overheating as I was running an airconditioned setup with an engine that was bored .030 over stock and had a racing cam. The A/C cooling system was in front of the radiator which caused the engine to overheat on a 300 mile trip in Texas in July. The head lost some compression in the number 4 cylinder so I removed it and had it milled and the valves reset. Since then, it has not been used, but was replaced. I originally paid $1,620 for the head when it was new, and the current price is around $2,000.
The Engine was built by a former DEI shop foreman in Mooresville, NC. It was dynameter tested at 320 HP, largely due to the addition of the 4.0 Head on the 4.2 liter block. The engine currently has two water ports blocked to accommodate the conversion to the unique set up. This can easily be modified by drilling out the porting if you desire. Below is the information as it appears on the HESCO website. The heads are currently on backorder, so they are not available online at this time.
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