Question about 2000 Yamaha YZF-R6

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Problem with 2001 Yamaha R6 Coolant

I am having a problem with my cooling system for a 2001 Yamaha R6. My coolant reservoir is filling up and then leaking out the reservoir overflow tube. I checked the radiator cap and it is on tight. When opening up the the cap I noticed a lot of coolant is sitting on top in the radiator itself. Which makes sense because I am seeing the reservoir fill up fast because all the coolant in the radiator is going to the top. Don't know what the issue is though...

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Most likely a blown head gasket. Exhaust gas is blowing past the gasket and into the cooling system. It will pressurise the cooling system and push the coolant into overflow bottle. You might notice that after riding the bike for a while and then leaving it to stand for a few minutes, it will push coolant back into the cylinder and you will get a big puff of steam out exhaust when you start it.
Best way to check is to do a compression test. Need to remove spark plugs and and screw a compression tester into the hole. Crank the starter and you will see the gauge go up in 3 or 4 strokes. Should be about 224 psi for a new stock motor. Repeat test for remaining 3 cylinders. Pressure should be 90% of that figure (201) and should not be more than 10% different from highest to lowest. Probably find one cylinder is really low.

Posted on Sep 11, 2014

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Posted on Jan 02, 2017

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mxtras
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SOURCE: my 2001 yz 426f boils/blows out radiator overflow hose

The older YZF's radiators were a tad small so they would overheat when sitting still. Even the newer ones will do this if sitting still for too long as there is no air flow across the radiators to dissapate the heat.

The overheating problem is more severe on the older bikes. The best bet is to make sure you avoid sitting still for too long. I know it's not much of a solution, but it's just the way it is with the older YZFs.

Posted on Feb 15, 2010

  • 39 Answers

SOURCE: I bought a 1999 yamaha r6 and i've been out riding

are you sure that the fans coming on and what is the highest temp. you seed

Posted on May 15, 2009

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SOURCE: i need to change the

Never Remove the Radiator Cap when the Bike is Hot! It will spray Hot Liquid all over you! --- Drain the coolant from the radiator by removing the drain bolt on the water pump (right side engine, where the radiator hose goes to). You then have to drain the coolant reservoir by either A) take off the coolant reservoir to drain it or B) use a suction pump to **** the remaining coolant from the reservoir. It is located near your master cylinder reservoir, small plastic tank with a rubber cap and tube. --- Fill your radiator by removing a lock bolt for the pressure cap and then filling it to the neck with your coolant of choice. Fill the coolant reservoir to the line marked on the back of the tank. Take the bike for a ride and get it up to operating temp, park it and wait until it cools. Check the level of coolant in your reservoir and add/remove as necessary. ---------- Click this link below for more details:--- http://howtobyme.blogspot.com/2011/07/how-to-fill-radiator-coolant-on-yamaha.html --------- This will help.Thanks.helpmech.

Posted on Jul 26, 2011

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Trapped air in the cooling system must be removed. A pressurized radiator coolant recovery reservoir system is used which continuously separates the air from the cooling system.
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  • The radiator coolant recovery reservoir separates any trapped air from the coolant and replenishes the system through its radiator coolant recovery hose to the water thermostat housing.
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I Suspect that you have AIR in your COOLING SYSTEM Fallow Procedures BELOW to Insure there is NO AIR IN COOLING SYSTEM


Draining and Filling Cooling System

Draining Procedure

Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system. Drain and refill the engine cooling system every 5 years or 240,000 km, (150,000 mi) , whichever occurs first.

  1. Park the vehicle on a level surface.
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Caution: Refer to Radiator Cap Removal Caution in Service Precautions.

  1. Remove the radiator cap when the engine is cool:
3.1. Slowly rotate the cap counterclockwise to the detention tab. Do not press down while rotating pressure cap. 3.2. Wait until any residual pressure, indicated by a hissing sound, is relieved. 3.3. After all hissing stops, press down on the radiator cap and rotate the cap counterclockwise in order to remove the cap.
Important: Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Do NOT pour used coolant down the drain. Ethylene glycol antifreeze is very toxic. Disposing of ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound.

  1. Place a drain pan under the radiator drain valve in order to collect all of the used coolant.
  2. Open the radiator drain valve located at the bottom of the radiator tank. If only partial cooling system draining is required, drain enough coolant to perform the procedure.
  3. Open the air bleed valve on the thermostat housing 2 full turns
    1. Open the air bleed valve above coolant pump 2 full turns.
    2. Place a drain pan under the engine block drains in order to collect the used coolant.Important: Allow the coolant to drain completely.

      1. Remove both of the engine block drains.
        • The front left engine block drain is located between the starter motor and the engine oil filter.
        • The rear right engine block drain is located near the crankshaft position sensor.
      Filling Procedure
      Reinstall the engine block drains
    3. Close the radiator drain valve,
      1. Install the coolant recovery reservoir. Notice: When adding coolant, it is important that you use GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL coolant. If Coolant other than DEX-COOL or HAVOLINE DEX-COOL is added to the system the engine coolant will require change sooner; at 50,000 km (30,000 mi) or 24 months.
      2. Slowly add a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water to the radiator until the coolant level is at the base of the radiator fill neck.
      3. Wait for 2 minutes and reinspect the level of the coolant in the radiator. If necessary, add coolant to the radiator until the coolant level is at the base of the radiator fill neck.
      4. Install the radiator cap.Ensure that the radiator cap arrow points toward the radiator overflow tubeImportant: The air bleed valves are brass. Do NOT over-tighten the air bleed valves.

        1. Close the air bleed valve above the coolant pump.
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          4. Turn off the ignition.
          5. Allow the engine to cool.
          6. Ensure that the engine coolant concentration is sufficient.

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