Question 1

How to replace the oil pan on Cadillac CTS?

Accepted Answer

The procedure starts by taking off the engine front cover before removing the power steering hose retainer from the A/C Compressor bracket followed by intermediate Steering Shaft disconnection. Afterwards disconnect the lower nuts from the Engine Mount while preserving the a/c pipes and hoses connection. Following the removal of this step you must relocate the A/C Compressor bracket bolts to the side before draining the engine oil and eliminating the transmission oil cooler pipe retainer found on the engine's right side. The engine support fixture installation requires tightened wing nuts to achieve sufficient clearance for the Oil Pan before you remove the drainage process can begin. Disassembly and cleaning and analysis of the Oil Pan should be done when required. Install the Oil Pan following assembly then position it into its slot before lowering the engine and connecting frame mounts through engine support fixture wing nut loosening. Reinstall the transmission oil cooler pipe retainer after filling the engine with new oil before installing the A/C Compressor bracket and A/C Compressor. When finished installing you should begin by adding Engine Mount lower nuts then reconnect the intermediate Steering Shaft followed by attaching the power steering hose retainer to the A/C Compressor bracket before reinstalling the engine front cover.

Question 2

How to replace the oil pan on 4WD on Cadillac Escalade?

Accepted Answer

To change the Oil Pan of the 4wd vehicles, first, jack up and support the vehicle. For 1500 series, unfasten the Oil Pan skid plate bolts and skid plate, where available. For 2500 series, loosen the two rear Oil Pan skid plate bolts and remove the 2 front bolts and the skid plate if equipped. Next you will take off the front differential carrier, unbolt and hang the steering rack downward, next you will put a suitable Oil Pan Drain Plug under the Oil Pan Drain Plug and take off the Oil Pan Drain Plug (430), so that the oil can drain out entirely. Replace the Drain Plug and tighten it to 25 nm (18 lb ft). Put the drain pan under the Oil Filter (437) and remove the Oil Filter allowing it to drain before re-installing it, and tighten to 30 nm (22 lb ft). Remove the right and left side transmission cover bolts and cover, followed by the removal of crossbar bolts/nuts and crossbar for both series. The involved work involves disjoining the engine harness electrical connector from the oil level sensor, and the a/c compressor bracket bolts; which are to be undone before you undo the Oil Pan bolts and the Oil Pan itself. If you are repurposing the Oil Pan, remove the old pan gasket rivets if needed, remove the old gasket and the old rivets. For installation, apply a new Oil Pan Gasket to the Oil Pan, apply a 5 mm (0.20 in) bead of sealant, 20 mm (0.80 in) long, to the engine block on the front and rear cover gasket tabs, and then install the Oil Pan and the remain of Oil Pan bolts, tighten m6 bolts 12 nm (106 lb in) and m8 bolts 25 nm (18 lb ft). Install 2 lower trans bolts and tighten them to a torque of 50 nm (37 lb ft), then install the a/c compressor bracket bolts and tighten it to a torque of 50 nm (37 lb ft). Connect the engine harness electrical connection to the oil level sensor get the threads of the crossbar bolts clean using denatured alcohol apply thread lock, gm p/n 12345493 (Canadian P/N1053488) or the equivalent and install the crossbar with bolts/nuts and zero head torque 120nm 21lbft on 2500 series, 100nm74lbft on 1500 series. Install the left side transmission cover bolt and bolt this down to 12 nm (106 lb in), then install the right side transmission cover bolt and tighten to 12 nm (106 lb in). If using the old Oil Pan, drain the old Oil Filter and replace with new Oil Filter (437), lubricating the seal with clean engine oil and applying 30 nm (22 lb ft) torque. Finally, install and tighten the Oil Pan Drain Plug (430) to 25 nm (18 lb ft), reinstall the front differential carrier with raising the steering rack and install the bolts tightening left side up to 200 nm (148 lb ft), and the right up to 100 nm (74 lb ft). For 2500 series place the Oil Pan skid plate you have to tighten 2 rear bolts and 2 front bolts if it is available tightening it to 28 nm (21 lb ft); for 1500 series, position the skid plate and install the bolts if equipped and tighten to 28 nm (21lb ft). Drop the vehicle, put oil in the engine as new oil, start the engine to check for leaks.

OEM Cadillac Oil Pan

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