I've pumped the tool by itself, will keep an eye on it.

Finished reassembling, started up and seems to be running okay. No leaks so far.
It did start to overheat after about 10 minutes, but I was expecting that because I haven't refilled the coolant properly yet.

Will try tomorrow and see how it goes. Hopefully no leaks appear under the car overnight
 
No leaks overnight.

Drained coolant today via rad plug, and slowly refilled with just water for now.

Followed the process in RAVE - but when I ran it again the temperature was averaging around 117-118C, which is decently outside normal range I believe?

Reading was made via obd tool - temp needle on the dash was still steady in the middle.

20250501_141845.jpg
 
The car is pre OBD so there's a chance it's not reading properly..... maybe? Thermostat should be fully open at 96c so you're way above that.

The coolant sensors only sense up to 130c, so you'd have thought the dashboard one was well above normal by 118c.

Was it otherwise running fine?
 
It seems to be running fine - but I haven't left it running for too long just in case it was getting too hot.
Upper rad hoses were scalding to the touch, but not rock solid, only quite hard.

Once it's cooled I'll double check the levels and give it another go.
 
I suspect you still have airlocks in there ? You could also put the sensor in boiling water & see what your diag tool says then ?
 
No leaks overnight.

Drained coolant today via rad plug, and slowly refilled with just water for now.

Followed the process in RAVE - but when I ran it again the temperature was averaging around 117-118C, which is decently outside normal range I believe?

Reading was made via obd tool - temp needle on the dash was still steady in the middle.

View attachment 340096
where was the needle on the temp gauge?

thats WAY WAY too hot for a rv8
 

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