Hey fellas, I've been having an issue that I want to post on here for posterity rather than Facebook.
On Saturday I went to the Mighty Car Mods track day at Mallala near Adelaide. I had the most fun I've had in a long time out on the tight, technical track and I was a lot quicker than I thought I would be relative to the rest of my group. I think they put me in the noob group because I hadn't been there before. I have some video footage to edit and upload as soon as I get the time.
After lunch the ambient temperature started to come up, it wasn't hot but was in the high 20's. I started to notice my coolant temperature would creep a bit and after 10 minutes on track it was just getting too high so I had to bail. Easing off for a cool-down lap brought it back down straight away. This happened on a couple of sessions before I gave up for the day.
I was talking to a local dude who seemed to know his stuff (he was driving a 400 kW Skyline that he'd built himself) and he sort of said it's common, probably the thermostat etc, all good points. But I'm not so sure. I have had quite a bad noise that has been getting worse lately and I put it down to a dodgy idler bearing (the one for the alternator belt). I got suspicious when I noticed after the second overheating run that there was no pressure in the coolant hoses right after the run, with the engine still running. I popped the timing belt covers off and the back of the belt is all shiny and looks like it's been slipping on something. So obviously I'll take the thermostat out and have a look I reckon the water pump is seizing up and unable to keep up with the higher RPM, or maybe the belt isn't tight enough? Sorry I forgot to take a photo of the belt, I'll do it as soon as I can. Belt and pump are only about 30,000 km old.
Any pearls of wisdom? Maybe just hurry up and get the Mivec motor ready?