Join Date: Feb 2017
Location: St. Louis, Missouri
V-Tom, when doing cooling system service on motorcycles I usually use Subaru Pre-Mix Coolant. Made for all aluminum engines, simplifies filling as there is no need to mix with water. Subaru also has a long-Life coolant, as does Mazda--5-year/60K miles and it works equally well. I use one or the other.
The manual's procedure is pretty simple, but I do this also:
In addition to any air-bleed bolts, I remove the coolant hose from the highest coolant port on the engine to bleed out more air, and sometimes add coolant to the open hose before reattaching to the engine port.
Run the engine til warm with a clean drain pan under the radiator/engine area. If it starts pushing coolant out of the radiator, you'll have that drained coolant to pour back in. If it really starts bubbling out, stop the engine and let the coolant level settle down, about 10 minutes. Restart the engine and repeat the filling/bleeding procedure. Install the radiator cap. Run the engine until the radiator cooling fan cycles on and off at least twice and watch the temp gauge. if the fan doesnt come on, you may have to power and ground the cooling fan motor, or jump the fan relay to get the fan to operate. I say this because on the way back from Deals Gap last in '17, I was stuck in traffic for over an hour, ambient temperature shown on my my ambient temp gauge was 116F...and my fan never came on and my coolant gauge never went above 3 bars. Once your sure the system is full and as hot as it will get, shut the engine off and let it sit for 30-60 minutes. Remove the radiator cap, fill the rest of the way, replace the cap, loosen the bleeder bolt and squeeze a radiator hose to remove bubbles, keep it squeezed as you tighten the bleeder. Then again remove the cap, and fill the radiator and bring the coolant reservoir up to the correct level. Done!! Have fun!