Hi all, I have the Skyline 350GT, same engine as the Z with an issue that nobody appears to know how to resolve
The water temp shoots up if i maintain over 2500 revs for more than 15 min, ie motorway driving, if i then put the cabin heat on the temp will come back to normal no matter how quick i go, turn the heat off and it rises again
So far car has had new thermostat, water pump checked and all fine, system pressure checked, all ok, sniffer test ok, burped, ok, HG checked and all ok, anything i missed?
All help much appreciated - the guys on the skyline forum are helping as well