lt1bird Posted January 11, 2009 Report Posted January 11, 2009 I have a radiator that does not have a location for the Cyl vent hose......Can I "T" it into one of the other hoses? It seems to want to be at the very top of the radiator.....I do not really want to drill a hole etc to mount a fitting.....I do have a port thats plugged about 25% down from the top of the radiator...I could put a fitting in there...Just wondering if the design intention was to have the fitting at the very top of the radiator where there probably is no antifreez.....just hot air.........Think the 25% down from the top would be ok??? Thanks! Quote
locogato11283 Posted January 11, 2009 Report Posted January 11, 2009 it needs to go to the top. why doesnt your radiator have the hole for it? Quote
2001Stroker Posted January 11, 2009 Report Posted January 11, 2009 Yup. Has to go to the very top of the of the top radiator tank. Keeps air from pockets from forming up in the head. That could cause some serious overheating and warping, if it didn't. Quote
jbooker82 Posted January 11, 2009 Report Posted January 11, 2009 I would say it wouldnt have to go directly to the top of the radiator. It just needs to be mounted higher than the head to allow traped air to escape. Quote
lt1bird Posted January 11, 2009 Author Report Posted January 11, 2009 I could see why it would be there but all the way to the very top? Lets face it, at the top of the radiator there will be only air....Now, as long as the hose at the top of the head has someplace to push the air im sure it would be fine....... Would it really make any diffrence....Im thinking no unless someone can convince me They mount the fitting at the top bacuse it's really the only simple place to mount it....Just a Guess on my part I dont think the RZ350 uses a vent??? Quote
sheerider1026 Posted January 11, 2009 Report Posted January 11, 2009 well, your coolant sysytem is under pressure when it gets hot. you would pump all of the coolant out of the motor if the hose is just left open anywhere.. it needs to connect to the radiator to let air escape that high part of the head, if not it will get air locked and the water will not circulate... no other way to connect it other than hooking it to the radiator.. Quote
blowit Posted January 12, 2009 Report Posted January 12, 2009 You would be fine by installing a type of valve on the hose of the head and using it purely as a bleeder when adding coolant. That is primarily it's function. It serves no use once the air is purged. Many other heads just use a bleeder screw but I guess Yam thought it would be smarter to just add a hose so there is one less step adding coolant. Fill coolant system, open bleeder till coolant comes out, start/run engine for 1-2min, open bleeder again to check for air, done. You should really always have a way to displace the air in any coolant system. Brandon Quote
jbooker82 Posted January 12, 2009 Report Posted January 12, 2009 I do have a port thats plugged about 25% down from the top of the radiator...I could put a fitting in there... I would just mount it right here like you said. It just needs to be higher than the head and hooked in to the pressurized part of the cooling system. ( IE dont hook it in to the over flow line, or you will just pump all the antifreez out when it heats up.) Quote
AKheathen Posted January 12, 2009 Report Posted January 12, 2009 the hose doesn't need to be at the verry top of the radiator, but it does need to vent to the rad. if you have an impellar failure, coolant will boill in the juggs, creating steam pockets that would need to vent, instead of pushing the coolant out Quote
2001Stroker Posted January 12, 2009 Report Posted January 12, 2009 Lets face it, at the top of the radiator there will be only air.... That's exactly why it goes to the top of the radiator. The water is coming out of the head, and into the radiator. Being above the waterline lets it flow freely onto the radiator. T-ing into another line, or mounting it below the waterline inside the radiator, could cause pressure in that hose. Then it would be fighting itself, and the water wouldn't flow at all from that hose. That's why the stock one is above the waterline in the radiator. And Blowit is 100% right. It's a vent for purging the air out of the head. You could just use a valve, but let's face it. Some of us get a little crazy, and flip our bikes over. That could cause air to get back in the head. Having the vent going to the radiator will purge the air back out once you flip the bike back over. Quote
lt1bird Posted January 12, 2009 Author Report Posted January 12, 2009 Flowing out the little bleeder hose or out the bigger head hose...they both will be under pressure....pushing coolant into the radiator. Thanks all for the feedback Quote
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