01 scrambler 500 4x4 - Page 2 - Yamaha Raptor Forum
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post #11 of 16 (permalink) Old 12-16-2015, 11:55 AM
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Open your radiator cap, fill to see water below the filler, and start the motor. Let it warm up, then look in the opening as you increase RPM's. You want to see turbulence, but no bubbles. If you see bubbles, you most likely have a blown gasket. You can also verify this, have your mechanic put his CO detector in your radiator. Any reading will verify a blown gasket. He prolly won't charge you, so have a $$.$$ tip handy.

+1 on OEM gaskets.
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2007 RAPTOR 700, SAND QUAD, 11:1 CP, +5 HR CRANK, PC3, +2 TB, LONE STAR XC +1, +1 A-ARMS, HD TIE RODS, JOGACA REAR SHOCK, ASV LEVERS, +4 REAR AXLE, DR.D REVERSE, ODI GRIPS, 1 1/8 CARBON BARS, DG BUMPER. BILLET: GAS CAP, BRAKE COVER, THROTTLE LEVER, BAR MOUNTS. LED LIGHTS'
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post #12 of 16 (permalink) Old 12-16-2015, 12:05 PM Thread Starter
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K. Changed the oil and it was black as night. Let it sit awhile and no seperation. So thats a pretty good sign.
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post #13 of 16 (permalink) Old 12-16-2015, 04:00 PM
If you don't wreck, you don't ride
 
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That is a good sign. But like me I have the same thing happening to my raptor but I used a multi layered steel head gasket which is allowing coolant to get by and pushed out the overflow discharge tube. I'll just add coolant for the time being, here in about a month I'm pulling the head and putting a OEM gasket on. I've done three different rebuilds one with a cometic head gasket (the one that is failing) and 2 OEM gaskets. The OEMs worked both times without a hitch.
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post #14 of 16 (permalink) Old 12-16-2015, 06:06 PM Thread Starter
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Thank you cammy.
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post #15 of 16 (permalink) Old 12-16-2015, 06:12 PM
If you don't wreck, you don't ride
 
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Anytime.

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post #16 of 16 (permalink) Old 12-16-2015, 06:35 PM
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I have a cometic just sitting in a drawer for that very reason. OEM all the way lol...

[U]2006 raptor 700

DMC Force 4's, FCI W/box, Dynatek Fusion
CP 11:1 piston, BaMotorsports porting, HC3
RacersEdge +3TB
YFZ 450 fronts & reworked rear by JOGACA
Trailtech 1 1/8 xbar w/vapor dash & Vapor installed
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PRM Edge Baja bumper w/12" Cree spot/flood bar
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PRM A-Arm skids, GYTR skid, ProArmor swinger skid
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68HP 49TQ

PM me if you need service manuals
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