How to Remove the Lower Radiator Hose From a 1991 Suburban
- 1). Open the hood the the 1991 Chevy/GMC Suburban. Make sure the engine is cold.
- 2). Crawl under the front of the Suburban with the drain pan.
- 3). Locate the drain valve on the lower corner of the driver's side of the radiator. Position the pan below the drain valve and turn the valve counterclockwise. Use the channel locks to loosen the valve if necessary. Crawl out from under the Suburban. Remove the radiator cap by pressing down on the cap and turning it counterclockwise a half turn. This creates a vacuum and allows the antifreeze to flow more steadily. Recheck the alignment of the drain pan immediately after removing the cap, as the flow of the antifreeze will quickly increase.
- 4). Allow the radiator to drain for at least 10 minutes to a slow or an infrequent drip.
- 5). Crawl back under the Suburban and hand-tighten the drain valve.
- 6). Move the drain pan over to the passenger side of the radiator and position it under the lower radiator hose.
- 7). Squeeze the hose-to-radiator clamp using a pair of channel locks to press the two protruding clamp tabs together. Slide the clamp inward away from the lower radiator neck outlet. For aftermarket clamps, use the screwdriver to turn the tightening screw counterclockwise until it's loose enough to perform the same procedure with the clamp.
- 8). Repeat Step 7 on the hose-to-engine-block clamp on the other end of the hose.
- 9). Grasp the radiator hose connected to the lower radiator neck outlet and twist the hose to loosen its grip on the neck. If necessary, use the screwdriver to assist in gently prying the hose off the neck. More antifreeze will pour out of the hose once disconnected, so position the hose carefully over the drain pan. Repeat for the engine-block end of the hose to finish removing it.
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