coolant overflow jug full

[0degC]

I ran my Thundercat on Sunday on race gas tune. I made a pass on it, then let my buddy try it. When he got back, he just shut it off as he coasted to a stop. A few minutes later it was dripping antifreeze out of the overflow jug. I started the sled 3 times and let it idle for around 45 seconds to 1 minute each time and the engine temp went right back to 168 degrees, but the overflow jug is still full to the plug. Last night, I set the left ski on a 5 gallon pail, right ski on two 5 gallon pails and a 4x4 block on top of that, and left the back on the ground with it strapped down. Brought the sled up to temp and cracked the bolt on the turbo side and no antifreeze was present. Started the sled with the bolt out and let it idle until coolant came out of the hole and reinstalled the bolt. I did this probably 5 times last night, sometimes it would have coolant in the reservoir on the turbo side, sometimes it wouldn't. The overflow jug is still almost full to the top. Heat exchangers at the back of the tunnel are hot so it's circulating the antifreeze, but why would it just fill the overflow jug all of a sudden?

You obviously overheated it. Don’t hot lap you sled on race tune needs time to cool down, by 2000ft she getting hot. Likely not a great idea to lend out your sled on race tune lol.

 

[Doc Harley]

View attachment 177590 If not one of these will be in order.

Jon, I'm all in to buy every item I need to protect my sled. And I have been looking at this for the off season. But what really is the failure rate? I've only heard of very few.....

 

[jonlafon1]

Jon, I'm all in to buy every item I need to protect my sled. And I have been looking at this for the off season. But what really is the failure rate? I've only heard of very few.....

Not a ton of failures. Most are probably from air in the coolant system. OR long hard pulls and HEAT.

 

[1nc 2000]

I had stock waterpump impeller fail around 7000 miles.

 

[jonlafon1]

I had stock waterpump impeller fail around 7000 miles.

Bet that caught your attention? Were you on a long pull Tim?

 

[1nc 2000]

Going about 80 down trail 8 at part throttle and it went. Computer shut engine down.
it was the first winter of covid and I sat on the trail for 2 hours before another sled came by.
This was on trail 8 between Buckhorn and Shingleton.
Was replaced under warranty and engine was good.

 

[Doc Harley]

Welllll..."ride fast & take chances" I always say.

 

[Simplespeed]

Going about 80 down trail 8 at part throttle and it went. Computer shut engine down.
it was the first winter of covid and I sat on the trail for 2 hours before another sled came by.
This was on trail 8 between Buckhorn and Shingleton.
Was replaced under warranty and engine was good.

When your dealer replaced did he use OEM or billet ???? Thats always a thought I have when riding alone, just how long is it going to be before help comes by…