TJ 4.0l. oil pan bolt pattern or layout for for the bolts

Start at the centre and criss cross to the ends.

2004 oil pan torque question.

Chevy Avalanche Fan Club of North America https://www.chevyavalanchefanclub.com > cafcna > 2...

Dec 10, 2015 - Tighten the oil pan-to-rear cover bolts to 12 N?m (106 lb in). Tighten the bellhousing, converter cover, and transmission bolts/stud to 50 N?m ( ...

transmission pan bolt pattern?

Diesel Place https://www.dieselplace.com > ... > Allison OEM
May 21, 2011 - transmission pan bolt pattern? ... Is there a specific pattern that should be used when tightening pan bolts? I see 20 ft-lb on the bolts in the ' ...

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Bobby, oil pan bolt torques for 4.0 Wrangler. Oil Pan Bolts 1/4 84 in-lbs Oil Pan Bolts 5/16 132 in-lbs As far as sequence, see last link, start in center, criss cross pattern tighten snug all, then repeat to torque spec.
Check the attached links,instruction and guides, Good luck
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Oil Pan Gasket leaking
http://jeephorizons.com/tech/99_40l_torque_specs.html
98 jeep 4 0 oil pan bolt torque sequence specs Google Search

drain the oil first as if your doing an oil change. undo all the bolts around the entire perimeter of the oil pan. drop it down.scrape the old gasket off of both the pan and the engine where it was mounted. Clean both surfaces well. put the new gasket on the pan and reverse the instructions for removal. jump from bolt to bolt in an crisscross pattern or else it won't seal right replace the drain plug may as well replace the oil filter and add new oil.

Removal & Installation

2.4L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil.
3. Remove or disconnect the following:
   
   Negative battery cable Structural collar A/C compressor bracket to oil pan bolt Oil pan
   
4. Clean the oil pan and all gasket mating surfaces.

To install:

1. Install or connect the following:
   
   Oil pan gasket to the block after applying engine RTV at the oil pump parting line Oil pan. Torque the bolts to 105 inch lbs. (12 Nm). Structural collar Negative battery cable
   
2. Fill the crankcase to the correct level.
3. Start the engine, check for leaks and repair if necessary.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil.
3. Remove or disconnect the following:
   
   Negative battery cable Structural collar A/C compressor bracket to oil pan bolt Oil pan
   
4. Clean the oil pan and all gasket mating surfaces.

To install:

1. Install or connect the following:
   
   Oil pan gasket to the block after applying engine RTV at the oil pump parting line Oil pan. Torque the bolts to 105 inch lbs. (12 Nm). Structural collar Negative battery cable
   
2. Fill the crankcase to the correct level.
3. Start the engine, check for leaks and repair if necessary.

3.0L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil.
3. Remove or disconnect the following:
   
   Negative battery cable Starter motor Front motor mount bracket Bending braces Torque converter dust shield Oil pan
   
   

   Fig. Oil pan mounting bolt tightening sequence-3.0L engine
   
   

To install:

1. Clean the oil pan all mating surfaces.
2. Apply RTV gasket material to the oil pan.
3. Install or connect the following:
   
   Oil pan. Tighten the bolts in sequence to 50 inch lbs. (6 Nm). Torque converter dust shield Bending braces Front motor mount bracket Starter motor Negative battery cable
   
4. Fill the crankcase to the correct level.
5. Start the engine, check for leaks and repair if necessary.

3.3L & 3.8L Engines

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil.
3. Remove or disconnect the following:
   
   Negative battery cable Engine oil dipstick Drive belt splash shield Strut to transaxle attaching bolt and loosen the strut to engine attaching bolts Transaxle case cover Oil pan fasteners Oil pan and gasket
   

To install:

1. Clean the oil pan and all mating surfaces.
2. Apply a 1 / 8 inch bead of gasket material at the parting line of the chain case cover and the real seal retainer.
3. Install or connect the following:
   
   New gasket on the oil pan Oil pan. Torque the bolts to 105 inch lbs. (12 Nm). Transaxle case cover All bending brace bolts Drive belt splash shield Engine oil dipstick Negative battery cable
   
4. Fill the crankcase to the correct level.
5. Start the engine, check for leaks and repair if necessary.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil.
3. Remove or disconnect the following:
   
   Negative battery cable Engine oil dipstick Drive belt splash shield Strut to transaxle attaching bolt and loosen the strut to engine attaching bolts Transaxle case cover Oil pan fasteners Oil pan and gasket
   

To install:

1. Clean the oil pan and all mating surfaces.
2. Apply a 1 / 8 inch bead of gasket material at the parting line of the chain case cover and the real seal retainer.
3. Install or connect the following:
   
   New gasket on the oil pan Oil pan. Torque the bolts to 105 inch lbs. (12 Nm). Transaxle case cover All bending brace bolts Drive belt splash shield Engine oil dipstick Negative battery cable
   
4. Fill the crankcase to the correct level.
5. Start the engine, check for leaks and repair if necessary.

OKAY LOOKING AT OIL PAN FACING SHALLOW END LEFT SIDE STUDS BOLTS SEQUENCE 13 12 11 10 9 BACK BOLTS 8 7 6 5 OKAY 5 BOLTS WILL BE ONE OF THE RIGHT SIDE STUDS STARTING AT 5 BACK STUD THEN BOLT 4 3 2 1 AND FRONT BOLTS ON FRONT OF PAN AFTER 1 BOLT 15 AND BOLT 14. SEE FRONT BOLTS ON FRONT END OF OIL PAN 14 15 AND 1. WRITE NUMBERS DOWN IN THE SEQUENCE I GAVE YOU ON PAPER. DRAW OIL PAN ROUGH DRAFT PUT THE NUMBERS I GAVE YOU I SAME SEQUENCE THATS YOUR OIL PAN BOLTS SEQUENCE.

Start the engine and let it idle for four minutes. This will help to remove as much loose particles from the transmission as possible Turn off the engine. Raise the front of the vehicle using a floor jack, and support the vehicle with two jack stands Apply the emergency brakes and block the rear wheels with two wooden blocks .Place a large drain pan underneath the transmission pan. Loosen the front and side mounting bolts from the transmission pan using a crisscross pattern. Then remove the bolts. Use a ratchet, ratchet extension and socket.Loosen the rear mounting bolts from the transmission pan about 4 turns each. Pry the transmission pan open at the front using a screwdriver and let the oil drain onto the drain pan. Hold the transmission pan from underneath, using a shop rag as you remove the remaining pan mounting bolts. Separate the transmission pan from the transmission, and tilt it over the drain pan to remove the remaining oil. Discard the transmission pan gasket. This is were the filter will be located remove and replace filter and then. Clean the transmission pan with spray carburetor cleaner and a shop rag.Install a new gasket over the transmission pan flange Set the transmission pan in place and start the pan mounting bolts by hand. Start tightening the transmission pan bolts in a crisscross pattern, a little at a time, until all the bolts are tight. Use the ratchet, ratchet extension and socket. Just tighten the bolts enough to create a seal between the pan and the transmission to avoid damaging the pan gasket.

drain the oil
remove all bolts from the pan.
verify new gasket hole patern matches your pan
use a high temperature silicone and put silicone on pan and stick new gasket to pan makig sure all holes line up.
when re-installing start at the corners of the oil pan and then go in a clockwise motion adding one bolt to the opposite side if the corner bolts until all bolts have been replaced.
tighten all bolts evenly starting in the cornersdo a criss cross pattern when tightening bolts to make sure pan seats properly
go back and snug any loose bolts
if you have a torque wrench or want to rent one go ahead and torque bolts to.
done.

The engine does have to be raised. The bolts are not easy to get to until the engine is lifted and the engine mount is removed. I'm doing this job right now and the book time is around 5 hours.

Count the bolt holes and you should have a matching number of bolts. All the same size and length. you can also use the pan gasket for the pattern.

It's a regular 12mm bolt (it doesn't look like a "plug") protruding horizontally from the back corner of the oil pan (aluminum pan with a waffle pattern, pretty much centered just in front of the front axle).