Massimo TBoss 560 coolent purging out overflow tube

[TBoss 560 2023]

Got a new 2023 TBoss 560 with 40 miles on it now. Noticed after about and hour of plowing snow coolant started hissing out the overflow tube. Initially made a pop or blow kind of noise and then saw some steam and smelt coolant. Coolent level is in the middle between low and high (running or not). Coolant under radiator cap is full when cold, appears nice and green. Checked oil doesn’t look milky. The temp ranges from 160-180 F running for 15-20. Noticed the other day there was some more coolant that blew out the overflow tube. I called the dealer and they said the system could be purging air. Dealer is 2+ hours away so wanting to get more thoughts before considering to bring it in. Also noticing hot/burning rubber smell but I think this is from the belt breaking in? Also notice the coolant smell from the exhaust when in higher RPMs. No white smoke from the exhaust. Also another possible issue. I notice that there’s a little bounce when on pavement. You can also hear the CVT kind of make noise with this bounce in tandem. Is this normal?

[Steve G.]

You've checked the radiator cap is good? Run it parked for a bit with cap off and watch to see if coolant seems to be flowing. Sounds like cap could be bad and not providing seal under pressure.

 

Edited February 7, 2024 by Steve G.
left out word

[Ben1098]

Best NOT to have in 4WD on pavement.  Hard on drive train.  OK if on loose dirt or snow.  Use rear wheel drive on hard surfaces.

[Joe Breaux]

massimos are known to have overheating issues.. look at the recovery bottle when its running and hot.. if you see tiny air bubbles, you have a blown head gasket.

[motojoe]

Check your thermostat, make sure that it is not stuck, to check put it into hot water to see if it opens.