Coolant - Engine wont warm up - stays cold

[sundee]

Are those temps with the oil cooler removed?
What were your oil temps with the cooler plumbed in eg. During a night drive home from work?

...I see what Paul is saying... But I don't think that the temp at the thermostat compared to the actual temp inside the engine would be that much different once it has stabilised.
I may be wrong.. Just thinking aloud

[maxhag]

^^ Yes Joel, Above is with the OIL COOLER REMOVED




Just got home from work......

I have put cardboard infront of the radiator...

Temps were better, but still not right (78deg at thermostat when got home), and still took a very long time to get there....

[maxhag]

Yes and no.... The return from the turbo goes to a tee piece on the outgoing heater lines..... So the hose bringing the water from the turbo and heater system into the remote thermostat housing is already mixed before it hits the themostat housing

[Gunner]

switch the hoses around jojo, Rian is onto something.

[maxhag]

Around?

[maxhag]

either way, the bottom rad pipe is cold untill 82deg......

[maxhag]

Here is my water routing. Hopefully my shithouse drawing skills dont make it too confusing

[Multivalve]

I had the same size waterlines through the turbo in the same place as I see in your drawing, that gave me the temprature spikes. I then took the return from the turbo and brazed a suitable fitting into the large pipe at the back of the water pump, and my spikes were gone. If you are using the water heating in the throttle body you can also see that one of the waterlines enter the pipe at the back of the waterpump and t into this line. Waterflow from turbo will then be routed straight back into the block and not into the thermostat housing and I think that will solve your trouble.

[maxhag]

I really cant see how that would make any differance Johan.......
It would actually create a bypass of the thermostat, which I see no point doing, as the thermostat is there to 'monitor' this water........... We have already established that the bottom radiator hose is cold untill 80deg, so there is nothing wrong with the thermostat function......

Please correct me if I am wrong......

[meadan]

Just out of curiosity, why is your microtech temp sensor mounted in the thermostat housing?

I understand that it worked well before, and it shouldnt make much difference at all...but I liked to mount at least one temp sensor in the back of the head water outlet. I ran one at the front and one at the rear, to give a proper idea of engine temp. This is where the factory sensors are also.

The way I see it, the whole external water setup acts as a radiator to a minimal degree, especially seeing you live in ridiculous cold conditions compared to most.

This probably doesnt help, but im curious about peoples opinions about temp sender positioning.

Other than that, it looks like you have it setup well, how does the temp go when driving enthusiastically? Like with air running through the engine bay but driving hard to get the engine hot?