Question 1

How to replace the oil pan on Buick LaCrosse?

Accepted Answer

The powertrain module extraction from the vehicle serves as the starting point for Oil Pan replacement. After installing the engine on an engine stand begin the installation process. The first step involves separating the A/C Compressor together with hoses from the engine followed by removing the engine front cover and the Oil Pan. First clean the Oil Pan before beginning its disassembly. Perform an inspection after complete clean-up. After disassembly the engine needs installation of the Oil Pan while it should return to its original position on the motor. Reinstall the A/C Compressor along with its hoses while installing the engine front cover last. For the last step connect the engine to both transmission and frame before reinserting the powertrain module into its original position.

Question 2

How to replace the oil pan on Buick Regal?

Accepted Answer

Start the Oil Pan replacement by disconnecting the negative Battery Cable then removing the fuel injector sight shield followed by disconnecting the intake air temperature (IAT) sensor electrical connector. The process starts with removing the Throttle Body air inlet duct in addition to the right and left Engine Mount struts. Set up the engine support fixture (J 28467-B) before lifting the vehicle with it. Start by removing the right exhaust manifold pipe stud nuts from the Catalytic Converter then drain all engine oil before you remove the Oil Filter. To reposition the wiring harness you need to detach power steering oil cooler pipe brackets from the frame and disconnect oil level sensor electrical connector and remove the oil level sensor wiring harness bolt. Start by removing the lower nuts from the engine mounts then lower the vehicle. The engine support fixture (J 28467-B) helps raise the engine before a second vehicle lift allows workers to remove the left and right Engine Mount bracket bolts, the right stabilizer link, and the right Ball Joint from the Steering Knuckle. Stop the frame with jack stands while you remove the right side frame bolts and loosen the left side frame bolts five turns prior to the frame lowering process. Extract first the Engine Mount and bracket from the frame before removing the torque converter covers. The first step before removing the Oil Pan is to disconnect the oil level sensor because damage is likely to occur. Begin the installation by removing both the Oil Pan bolts then the Oil Pan and the oil pump pipe screen assembly and the Oil Pan Gasket. All mating surfaces of the oil pump screen need cleaning along with the Oil Pan flanges and engine front cover and rear main bearing cap and threaded holes and Oil Pan rail. Place the Oil Pan Gasket and the oil pump pipe screen assembly on the vehicle before tightening the screen bolts to 15 nm (11 ft. Lbs.). We should install the Oil Pan using one drop of thread lock compound gm p/n 12345382 or equivalent on the cleaned Oil Pan bolts before tightening them at 14 nm (125 inch lbs.). After tightening the oil level sensor to 20 nm (15 ft. Lbs.), install the torque converter covers and secure the Engine Mount to the frame. After positioning the frame back to normal height, replace the frame bolts while the jack stands remain in place before removing them. Mount the right Ball Joint onto the Steering Knuckle along with the right stabilizer link before attaching the loose right and left Engine Mount bracket bolts to the engine. Secure these bolts at 102 nm (75 ft. Lbs.). Use the engine support fixture (J 28467-B) to lower the engine after lowering the vehicle. Lift the vehicle for a second time to bolt the Engine Mount lower nuts at 78 nm (58 ft. Lbs.) torque setting before installing the oil level sensor wiring harness and bolt with 10 nm (89 inch lbs.) torque. Next install the power steering oil cooler pipe brackets, right exhaust manifold pipe stud nuts, and connect the oil level sensor electrical connector. Tighten the attachments at 32 nm (24 ft. Lbs.). Place the engine Oil Filter then lower the vehicle and use j 28467-b to remove the engine support fixture after reinstalling the right and left Engine Mount struts. To complete the procedure install the air inlet duct then reconnect the iat sensor electrical connector before filling the crankcase with engine oil while reinstalling the fuel injector sight shield and connecting the negative Battery Cable and performing leak checks and wheel alignment measurements.

Question 3

How to Service and Repair the Oil Pan on Buick Enclave?

Accepted Answer

To replace the Oil Pan, drain off the engine oil first and then remove the Oil Filter. Secondly, take out the exhaust flexible pipe and the engine, and then the engine front cover. Then, unscrew the Oil Pan bolts and pry off the rtv sealant with the pry points along the edge Oil Pan before lifting off the Oil Pan from the block. Clean Oil Pan and the surface of the engine block gasket. For installation, the 8 mm (0.315 in) guides from the (EN 46109), insert them into the center Oil Pan rail bolt hole on each side of the engine block; after that, run a 3 mm (0.118 in) bead of rtv sealant, gm p/n 12378521 (Canadian P/N 88901148), or equivalent on the block pan rail and the crankshaft rear oil seal housing. Place the Oil Pan on the block and take out the (EN 46109) guides. Tightly loosen the Oil Pan bolts, making sure to tighten them in an order specified: 8 mm bolts (1-11) and torque to 23 nm (17 lb ft) and 6 mm bolts (12, 13) and torque to 10 nm (89 lb in). Lastly, the engine front cover, engine, and exhaust flexible pipe need to be reinstalled and the engine oil needs to be refilled.

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