To find out which 0331 you have, shine a light down in the oil filler cap and look at the surface of the head between the #3 and #4 cylinders. Below is a pic another member here posted a while back of an original 0331 on the left, and a Clearwater 0331 on the right.
Are all Jeep 4.0 heads the same?
Not so! The heads will swap mechanically, so they’ll bolt right up to the block (the 258 and 242ci heads, 1975 and later, use the same screw pattern and can use much the same gasket.) Yes, the 0331 head (1999-2006) will have the coil rail bosses that the previous heads will not.
Where do 0331 heads crack?
Most “0331” heads are cracking on the valve spring side (which won’t cause a miss). If it’s between an exhaust port and the water jacket, you’ll have steam coming from the exhaust but the engine will run fine.
Where is the casting number on a jeep 4.0 HEAD?
It’s on the driver’s side. Use a GOOD light to help you read it! Above &
between the #3 &
#4 exhaust ports, outside the valve cover rail. It’s a four-digit number.
What Jeeps have the 4.0 inline 6?
The following years and Jeep models have 4.0L straight-6 engines:
- 1987-2001 Jeep Cherokee.
- 1993-2004 Jeep Grand Cherokee.
- 1987-1990 Jeep Wagoneer.
- 1987-1992 Jeep Comanche.
- 1991-2006 Jeep Wrangler.
What year is jeep 4.0 interchange?
The 4. During the period between 1987 and 2006, Jeeps used a 0 liter engine, and it remains with us forever.
How much does a jeep 4.0 head weigh?
The block, clean and stripped, weighs 138 pounds. The head without valves, springs or rockers weighs 65 pound. The crank weighs 57 pounds.
How do I know if I have a 4.0 Jeep engine?
4.0L Engine Date Codes
- 1st Digit-The year (8 = 1998).
- 2nd & 3rd Digits-The month (01 – 12).
- 4th & 5th Digits-The engine type/fuel system/compression ratio (MX = A 4.0 Liter (242 CID) 8.7:1 compression ratio engine with a multi-point fuel injection system).
- 6th & 7th Digits-The day of engine build (01 – 31).
How can I tell what year my Jeep engine is?
Engine date code. The date code is on the passenger side of the engine, on the block, just forward and up from the distributor on a machined flat surface. The digits of the code identify: 1st Digit-The year (8 = 1998).
How do I know what engine is in my Jeep?
Examine the right side (driver’s side) of the engine below the distributor and above the oil pan. The casting numbers are typically found on top of the engine head in the right front corner.
Which Jeep has a straight 6 engine?
Jeep CJ (1972–1986) Jeep Cherokee and Wagoneer (1972–1986) Jeep J-Series (1971–1988) Jeep Wrangler (1987–1990)
Why is the Jeep 4.0 so good?
The Jeep 4.0 liter six-cylinder engine provided good acceleration from low speeds in Jeep Wranglers and Cherokees for years, with high torque at low engine speeds. It was used in other vehicles (such as the Grand Cherokee) as well, a strong, durable performer loved by its owners.
How much horsepower does a 4.0 inline 6 have?
4.0 Straight-Six Engine Specs
|Bore x Stroke||98.4mm x 86.7mm|
|Compression||8.8 : 1 to 9.2 : 1|
Are all Jeep 4.0 engines interchangeable?
Just think of it as swapping in a long block. XJ Cherokee and ZJ Grand Cherokee 4.0L engine blocks interchange. 2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange. XJ/ZJ blocks, and the 2000+ TJ/WJ blocks do not interchange without significant modifications.
How long will a 4.0 Jeep engine last?
As little as 100,000 miles can be covered by a Jeep Wrangler. It is possible for a Jeep Wrangler with a reasonable condition to last up to 200,000 miles. To find a used car that is in good condition and in excellent condition, you could buy it for 3400,000 or more.
When did the Jeep 4.0 come out?
The 4.0 liter Jeep engine was used in Jeeps from 1987 to 2006 and it’ll never be gone from our hearts. However, the origins of the Jeep inline 6 date back even further.
How much does a 3.7 Jeep engine weigh?
The Jeep Cherokee (KJ) 3.7i V6 has a V 6, Petrol engine with 3700 cm3 / 225.8 cu-in capacity.
|Jeep Cherokee (KJ) 3.7i V6 Size, Dimensions, Aerodynamics and Weight|
|Curb Weight :||1822 kg OR 4017 lbs|
|Weight-Power Output Ratio :||8.6 kg/hp|
What does a 350 engine weigh?
There is about 540 to 560 pounds in the old 350, whereas 445 pounds were added.
How heavy is a 2Jz engine?
How Much Does A 2Jz Short Block Weight? The stock 2jzge weighs roughly 475 pounds when it comes to w/speakers, and its biggest weight is 650 pounds when it comes to w/o transmissions as opposed to the stock 2jzge which weighs approximately 500 pounds.
How can I tell what year my XJ is?
The VIN is comprised of 17 alphanumeric characters. Locate the tenth character of the VIN, counting from left to right. This character will tell you the year of the Jeep (this only applies to Jeeps built after the 1970s).
What model is my Jeep?
The sticker on the door jamb reveals the type, make, model, and other production information for Jeeps built beginning in the 1970s up until today as well as the year, make, and model in which they were built.
How do you tell if your Jeep is a YJ or TJ?
The fastest way to tell it apart from the other Jeeps is to look for the square headlights. In 1992, the YJ introduced an important change with fuel injection, boosting fuel efficiency and reliability. After the YJ came the TJ in 1997, after no Wrangler was sold for the 1996 model year.
How do I decode my Jeep VIN number?
How to Decode a Jeep VIN?
- 1 – Country (USA)
- C – Manufacturer (Chrysler)
- 4 – Vehicle Type (Passenger Car)
- NJCBA – Description (4WD/4DR/SUV/Jeep Compass)
- 9 – Check Digit.
- G – Model Year (2016)
- D – Assembly Plant (Belvidere, Illinois)
- 681479 – Production Sequence Number.