Hey guys.
Got this issue here. I should be able to work this out, but having no luck as yet...

Story: AE71-4AGTE. It's a fresh build in this chassis, but this is a existing engine setup that has been fine for 6 years, in 3 chassis.....

Sorry, but thought it was proberley easier just copying and pasting from the build thread.......


1ST post - After the cars first real drive

- Engine is taking a long time to warm up. Coming home from work tonight (12:30am, minus -4 cold canberra), I let the car warm up for almost 15 minutes before I finished work. When I went to leave, water temp was only 62deg after idleing for 15 minutes (temp on Microtech hand controller). Anyway, after driving, it went up to about 75deg. I turned the heater on. The heater blew COLD air. Not only was it blowing cold air, but the engine water temp dropped dramatically, down to the 50's. I turned the heater off, and it slowly started to creep up again. I only had a few minutes more to drive.
It doesn't sound like the thermostat got a chance to even open. I must have some of the water routing slight wrong, so I will have to have a look at that.....









2nd post: after looking at it

Well , I've just spent 3 hours on this water issue, and now I just have the shits.....
It all looks plumbed ok...... ??????

- Car running at idle, for OVER 20 mins during the day, and temp only just got to 82deg, and wouldn't go any higher than 84deg. (on the Microtech Hand controller) That sensor is on the remote thermostat housing. NO FAN RUNNING
- The aftermarket temp gauge I have, has the sensor on the top radiator pipe, and that is only reading 70deg when the other sensor mentioned above is at 84deg
- Third temp gauge is the stock dash one, which hardly gets off Cold.

I have thoroughly bled the system.
I have checked the thermostat, and it's not stuck open.
Bottom radiator pipe stayed cold until the thermostat housing got to 82deg (as it should), but then would get colder when it started to open and close up again
If I turn the heater on, the water temp drops and stays cold.....
All water lines feel hot by touch, except bottom radiator hose. (bottom hose only got a little warm when the thermostat was trying to open)

I should be able to work this out, as I have done many 4age conversions now, but I have never had this issue.....


This is doing my head in, and it's even given me an actual headache!!! Where the hell is the heat going? I cant see how an engine can just idle infinatly (or for even long periods), without cooling??????????????


I have proberley missed something simple, but it's always to get a fresh set of eyes/ears opinion....

Thanks