OEM 2004 Chevrolet Astro Oil Pan

2004 Chevrolet Astro Parts Questions & Experts Answers

• Q: How to replace the oil pan on 2004 Chevrolet Astro?

  A: In order to replace the Oil Pan, you should disconnect the battery negative end and remove oil level indicator first. Remove the Oil Pan Drain Plug and drain the engine oil into an appropriate reservoir, and remove the Oil Filter. Subsequently remove the bolt which attaches the oil cooler pipes bracket to the Oil Pan, and after that the Oil Filter adapter. Remove the bolt attached to the bracket for Starter wiring harness as well as the transmission cooler pipes, and disconnect the crankcase position sensor wiring harness from the retainer. Remove the Starter and cover transmission, and also remove the inner axle shaft housing support bracket to the frame nuts and washers. Unscrew the front differential carrier upper and lower mounting nuts and bolts and ease the front differential carrier assembly down a little to take the Oil Pan off. Remove the road plugs to access the Oil Pan rear nuts, remove the transmission to Oil Pan bolts, and take out the Oil Pan from the engine. Clean all the sealing surfaces of the engine and the Oil Pan prior to placing them back on the engine, make sure that the transmission is put in place first to avoid transmission failure. Mount the transmission to Oil Pan bolts and nuts, tightening down to 47 nm (35 ft. Lbs.), then install access plugs for the rear Oil Pan nuts. Attack the front differential carrier assembly, and complete the carrier upper and lower mounting bolts and nuts, then the inner axle shaft housing support bracket to frame washers and the under nuts. Increase the bolts on transmission cover to 12 nm (106 inch lbs), and add on the Starter motor. Hold firmly the bracket of the Starter wiring harness and transmission cooler pipes with a bolt, and tighten to 10 nm (89 inch lbs.) and re-install the ckp sensor wiring harness in the retainer. Then install the Oil Filter adapter and the oil cooler pipes bracket bolt with its 10 nm (89 inch lbs), then the Oil Filter, and the Oil Pan Drain Plug-tightened to 25 nm (18 ft. Lbs.). Lower the vehicle, put the engine oil into the crankcase, then reconnect the negative cable of the battery.