How to replace oil pan seal - 1996 Cadillac DeVille

Take out the oil drain plug and drain the oil from the engine(let it drain for about an hour), use a small flat head screwdriver to break the seal between the oil pan and the engine, take it off, make sure you get all of the seal and gunk off of the engine and the pan where the seal goes, replace the seal and add any sealant if required and replace the pan, tighten the bolts from one side to the other and then one side to the other until you tighten them all(like you would the lug nuts on a car's tire). add 4.5 quarts of oil, let it sit for a while and then run the car at idle for around 10 minutes. Done.

It is recommended that you lift out the engine before attempting to replace the oil pan. Once the engine is lifted you can remove the bolts, remove the pan, clean all the old gasket material.
Installation: Remove the rear main bearing cap oil seal Remove the timing cover oil seal Clean all the mating surfaces and seal grooves Install new oil pan front cover seals Install a new rear main bearing cap oil seal Install new oil pan side gaskets on the block Make sure the tabs of the front and rear seal fit properly as these are critical spots Attach the oil pan to the engine block and install the retaining bolts

1. timing cover is leaking oil betwwen cover and block
   
2. Disconnect the negative battery cable.
   
3. Remove the drive belt(s), fan and fan shroud. If equipped, remove the accessory drive belt pulley.
   
4. Remove the vibration damper retaining bolt and washer. Remove the vibration damper using a suitable puller.
   
5. Remove the accessory drive brackets attached to the timing cover.
   
6. Remove the A/C compressor, if equipped, and alternator bracket from the cylinder head and move to one side.
   
7. Remove the oil pan-to-timing case cover bolts and the cover-to-cylinder block bolts.
   
8. Remove the timing case cover front seal and gasket from the engine.
   
9. Cut off the oil pan side gasket end tabs and oil pan front seal tabs flush with the front face of the cylinder block. Remove the gasket tabs.
   
10. Clean the timing case cover, oil pan and cylinder block gasket surfaces.
    
11. Remove the crankshaft seal oil seal from the cover by prying it out with a suitable tool.
    

To install:

1. Install a new seal in the timing cover using a suitable seal installation tool.
   
2. Apply sealer to both sides of the replacement cover gasket and position the gasket on the cylinder block. Cut the end tabs off the replacement oil pan gasket corresponding to those cut off the original gasket. Attach the end tabs to the oil pan with sealer.
   
3. Coat the front cover seal end tab recesses generously with sealer and position the seal on the timing cover.
   
4. Apply engine oil to the seal-oil pan contact surface, then position the cover on the cylinder block.
   
5. Insert timing case cover alignment tool J22248 or equivalent, in the crankshaft opening. Install the cover-to-cylinder block bolts and tighten them to 62 inch lbs. (7 Nm). Install and tighten the oil pan-to-cover bolts to 11 ft. lbs. (13 Nm).
   
6. Remove the cover alignment tool and position a replacement oil seal on the tool with the seal lip facing outward. Apply a light coat of sealer to the seal and a light coat of oil to the crankshaft. Install the seal on the timing cover.
   
7. Apply a light film of oil to the vibration damper hub seal contact surface. Install the vibration damper using a suitable installation tool.
   

Do not hammer the damper into place as damage may result to the damper or engine.

1. Install and tighten the crankshaft vibration damper bolt to 80 ft. lbs. (108 Nm).
   
2. If equipped, install the crankshaft pulley and tighten the bolts to 20 ft. lbs. (27 Nm).
   
3. Install the accessory brackets.
   
4. Install the fan and fan shroud.
   
5. Install the drive belt(s) and adjust to the proper tension.
   
6. Connect the negative battery cable.
   
7. Start the engine and check for leaks
   
8. .
   

start the car and let run for 2 minutes just to warm the oil and make it a little thinner,turn car off. now if you cant get under the car jack ther car up, and let the vehicle rest on jack stands. drain the oil from the oil drain plug which should be on the bottom of the oil pan. once the oil is drained replace the oil drain bolt and tighten it. then remove all of the bolts that keep the oil pan in place. should be around 6 of them. remove oil pan and scrape off the old seal with a clean scraper. place new seal on, and replace the pan. put the bolts back on tightly and refill the engine oil to specified amount. check to be sure there is no leak on the oil pan. turn vehicle on and let the car run for a few minutes. make sure there is still no leak.

the oil pan will need to be removed to repalce the rear seal, so replace the front seal and gasket then, replace the timing chain/gears if sloppy, then reinstall the oil pan.

Hello, the oil pump can be removed by removing all the 10mm size bolts on the pump housing, it is not necessary to remove the oil pan or anything else. The oil pump pulley can be removed by taking off the 12mm nut then pull the pulley off and the seal can be replaced.

you have to reseal the oil pan, the oil pan is a 2 piece upper and lower pan. the engine or trans mission has to0 be rtemoved to remove the oil pan per general motors there is new sealer available also the front and rear crankshaft seals should be replaced (need special tools to replace seals)

you oil pan bolts of the bottom of the oil resivour the gaskit fits in between the surfaces where the pan meets it creating a seal witch in your case needs to be replaced this procedure replaces that gaskit to create a new seal

drain the oil, remove the pan peel off old seal replace with new seal in pan and put the pan back on thighten down and refill to manufacturer seting for oil

Could be a rear main seal.