Question 1

How to service and repair the oil cooler on Cadillac Catera?

Accepted Answer

Service and repair of the Oil Cooler require first removing the intake plenum and Intake Manifold from the vehicle. First disconnect the engine coolant temperature sender along with the engine Coolant Temperature Sensor from the water crossover and afterward break all water crossover bolts and remove upper seals then separate the water crossover from lower seals. Before removing the oil feed line and return line from the Engine Oil Cooler you must loosen the upper heat shield bolts on the lh side of the Exhaust Manifold and record the original placement of the four seals. Lift the vehicle before you remove the left-side Catalytic Converter and oil filter cartridge housing from engine block position. Begin installation by removing the bolt securing the crank position sensor (CKP) along with the ckp sensor and next disconnect the oil feed line and oil return line from the engine block prior to lowering the vehicle. Secure the oil feed and return lines in place using mechanic wire because these lines should stay out of the way. You should remove the Engine Oil Cooler inlet and outlet nuts using socket wrench tools and expose the Engine Oil Cooler cover bolts for removal. With all these parts separated you can remove the Engine Oil Cooler cover and its mounting members. Wipe down all essential sealing surfaces with a clean rag. To install the Engine Oil Cooler use a 2 mm (0.08 inch) bead of rtv silicone sealant gm p/n 12346240 in the cover's grooved area before installing the cover. Fasten the Engine Oil Cooler cover bolts to 30 nm (22 ft.lbs.) torque. After that, install the Engine Oil Cooler inlet and outlet nuts and adjust their torque to 20 nm (15 ft.lbs.). Reposition the oil feed and return lines then raise and support the vehicle again before installing the feed line to the engine block with 30 nm (22 ft.lbs.) torque and the return line at the same torque setting. Mount the ckp sensor using an 8 nm (71 inch lbs.) torque before adding the engine block-mounted oil filter cartridge housing that must be secured at 15 nm (11 ft.lbs.). Return the installation of the left side Catalytic Converter and subsequently drop the vehicle down before connecting the Engine Oil Cooler's oil feed and return lines with four fresh seals that must reach tightening torque specifications of 30 nm (22 ft.lbs.). High temperature nickel anti-seize lubricant gm p/n 12371386 or its equivalent should be applied to Exhaust Manifold heat shield bolts before installing and tightening upper bolts facing left side of Exhaust Manifold to 8 nm (71 inch lbs.). Finish the installation by placing the crossover in position and then fitting upper seals onto bolts before inserting bolts into the crossover and fastening the lower seals under it and finally tightening bolt nuts to 30 nm (22 ft.lbs.). After installing the engine Coolant Temperature Sensor electrical connector and the engine coolant temperature sender electrical connector, install the Intake Manifold and intake plenum while also checking and filling the engine oil.

Question 2

How to replace the oil cooler and oil cooler cover on Cadillac CTS?

Accepted Answer

You need to start by removing the Intake Manifold together with the water crossover before replacing the Oil Cooler and Oil Cooler cover. The first step is to detach the inlet fitting together with the outlet fitting from the Engine Oil Cooler while keeping records of the 4 seals' initial positions. Begin by taking off the Engine Oil Cooler lines running through the engine followed by the removal of Engine Oil Cooler inlet and outlet nuts and Engine Oil Cooler cover bolts. Remove the Engine Oil Cooler cover and the cooler itself to clean the mating surfaces of the cylinder block while inspecting the Oil Cooler design. Begin by installing the Engine Oil Cooler inlet/outlet o-ring seals before applying a 2 mm (0.08 inch) bead of gm p/n 12378521 (Canadian P/N 88901148) to the groove around the Engine Oil Cooler cover. Thread adhesive gm p/n 12345382 (Canadian P/N 109534382) should be applied to Engine Oil Cooler cover bolts prior to position its installation onto the engine. Start by affixing the Engine Oil Cooler cover bolts to their respective locations and tighten them to 20 nm (15 ft. Lbs.) using a sequence method. Install the Engine Oil Cooler inlet and outlet nuts while applying 30 nm (22 ft. Lbs.) of torque force. Use 4 new seals when installing the Oil Cooler inlet and outlet fittings to the Engine Oil Cooler. Both fittings need to be tightened to 30 nm (22 ft. Lbs.). You should first connect the Oil Cooler lines to the engine before completing installation with the water crossover and the Intake Manifold.

Question 3

How to replace the Auxiliary Engine Oil Cooler on Cadillac XLR?

Accepted Answer

Beginning auxiliary Engine Oil Cooler replacement requires raising and supporting the entire vehicle. Next, remove the wheelhouse panel. First install an oil drain pan underneath the vehicle and detach the Engine Oil Cooler hose/pipe from its external cooler. The external Engine Oil Cooler needs to be removed after retaining bolt removal and Engine Oil Cooler hose/pipe seals must be discarded. Installation starts by adding new Engine Oil Cooler hose/pipe seals and proceeding with external Engine Oil Cooler assembly. Screw on the retaining bolts while making sure they reach 10 n.m torque (89 lb in). Check the quick connect fitting by pushing it onto the connector before pulling it to verify correct connector operation. After reattaching the Engine Oil Cooler hose/pipes to the external Oil Cooler remove the oil drain pan and reinstall the wheelhouse panel. To finish the procedure top off engine oil before doing a leak inspection.

OEM Cadillac Oil Cooler

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