Tools You'll Need:
* Drain pan (large enough to hold several quarts of coolant)
* Wrenches (likely 8mm, 10mm, and possibly others depending on your drain valve)
* Gloves (to protect your hands from the coolant)
* Funnel (optional, but helpful for refilling)
Procedure:
1. Locate the Drain Valve/Petcock: The most reliable way to drain the engine block is to locate the drain valve or petcock on the engine block itself. This is usually a low point on the block near the bottom of the radiator hose connections. Your owner's manual will be your best resource for pinpointing its location. It might be a simple bolt or a specialized valve.
2. Position the Drain Pan: Place your drain pan under the drain valve. Make sure it's large enough to catch all the coolant.
3. Open the Drain Valve: Carefully loosen and remove the drain valve or petcock using the appropriate wrench. Let the coolant drain completely. This may take some time.
4. Open the Radiator Drain Cock (If Applicable): Many vehicles also have a drain cock at the bottom of the radiator. Opening this will help drain additional coolant from the system. Again, consult your owner's manual for its location.
5. Check for Complete Drainage: Once the flow from the drain valve(s) has stopped, you can further encourage drainage by slightly tilting the vehicle (if safe and feasible). Make sure the vehicle is parked on a level surface.
6. Close the Drain Valve(s): Once the coolant has drained, carefully replace and tighten the drain valve and radiator drain cock (if used).
7. Dispose of Coolant Properly: Coolant is toxic and should be disposed of responsibly. Check with your local waste management facility or auto parts store for proper disposal methods.
Important Considerations:
* Coolant Type: Note the type of coolant (usually 50/50 mix of antifreeze and distilled water) your Quest uses before you drain it. This information is usually in your owner's manual or on a sticker under the hood. You'll need the same type for refilling.
* Air Pockets: When refilling the system, be sure to bleed air pockets from the system. This usually involves opening the bleed valve (located at a high point on the engine or radiator) and filling the system until coolant flows out of the bleed valve without air bubbles. Again, consult your owner's manual for the bleed valve location.
* Owner's Manual: The instructions above are general. Always consult your 2001 Nissan Quest's owner's manual for the specific procedures and locations relevant to your vehicle. This is crucial to avoid damaging your vehicle.
If you are not comfortable performing this task yourself, it's best to take your vehicle to a qualified mechanic. Working with coolant can be messy and dangerous if not handled properly.
