greenthumb
Active VIP Member
'17 Summit, 9000km
1500km on dealer installed new engine including new head, injectors, etc. Done in March 2020.
No cooling issues with old engine and no issues at all with new engine until now.
Got stuck in the trees in powder. Upon restart, gauge indicated overheat. Tunnel wasn't hot, but sled had been off for 5min. Don't know the temp prior to stuck, but was not beeping overheat.
No obvious causes. Coolant expansion tank was empty. Added roughly 1L of water, idled nose high until thermostat opened. Leaked some coolant out the overflow hose, but expected since I filled the reservoir to the top.
Rode the sled the rest of the day and another day without any issues.
Tore sled apart for maintenance. Expansion tank was empty again and some evidence of coolant on outside of panel near overflow hose.
Cap appears to be good, but I have ordered a new one. I don't have a tester for it, but the spring feels normal
No indication of leaks from any hoses or anywhere under the hood. Clamps are tight.
Tunnel shows expected wear but can't find a leak.
No indication the engine is consuming coolant. No odor from exhaust. Plugs and Y-pipe appear normal.
I'm going to try and rig something up to do a cooling system pressure test tomorrow.
Any ideas?
Cylinder head o-rings leaking combustion gasses and over pressuring system, but not leaking coolant???
1500km on dealer installed new engine including new head, injectors, etc. Done in March 2020.
No cooling issues with old engine and no issues at all with new engine until now.
Got stuck in the trees in powder. Upon restart, gauge indicated overheat. Tunnel wasn't hot, but sled had been off for 5min. Don't know the temp prior to stuck, but was not beeping overheat.
No obvious causes. Coolant expansion tank was empty. Added roughly 1L of water, idled nose high until thermostat opened. Leaked some coolant out the overflow hose, but expected since I filled the reservoir to the top.
Rode the sled the rest of the day and another day without any issues.
Tore sled apart for maintenance. Expansion tank was empty again and some evidence of coolant on outside of panel near overflow hose.
Cap appears to be good, but I have ordered a new one. I don't have a tester for it, but the spring feels normal
No indication of leaks from any hoses or anywhere under the hood. Clamps are tight.
Tunnel shows expected wear but can't find a leak.
No indication the engine is consuming coolant. No odor from exhaust. Plugs and Y-pipe appear normal.
I'm going to try and rig something up to do a cooling system pressure test tomorrow.
Any ideas?
Cylinder head o-rings leaking combustion gasses and over pressuring system, but not leaking coolant???
