Sunday, October 29, 2006 - 12:37 pm, by: Dan McColl(Hoon)
In the first pic. Note the little flat bit on the back of the Thermostat.
When the thermostat opens this little flat bit goes back into this hole (with the arrow) and blocks it off, also it opens the main thermostat valve allowing water OUT OF the radiator.
When the thermostat is closed, it blocks the big hole to the radiator and opens the little one at the back, allowing water to keep circulating to prevent localised hot spots and also to prevent cavatating in the water pump.
Sunday, October 29, 2006 - 12:49 pm, by: Dan McColl(Hoon)
Note: This is (obviously) a V8, I'm sure the TT's work differently, but I haven't looked into it and don't have a lot of knowledge on 1JZ (or 2JZ for that matter) specifics.
Sunday, October 29, 2006 - 01:11 pm, by: Dan McColl(Hoon)
Some more diagrams to help with understanding.
The first one is water flow when cold and thermostat closed.
The next pic is water flow when hot and the thermostat open.
Also note that there are many in betweens with the thermostat partially open which would result in part of the flow bypassing the radiator and part going through it.
Any way. You can probably figure out that with no thermostat in there, you would have no control over the bypass and would have water flows going in directions they're not meant to go, which could have some bad results.
It may be fine, But I'm not going to try it out.
Also note that the thermostat is on the return line from the radiator, rather than block the flow to the radiator it blocks the return flow from it. I would guess that this is to keep the Bubble tank / Expansion bottle working properly.
Sunday, October 29, 2006 - 04:52 pm, by: Rehan Bandara(Parsec)
nice selective hearing!
i think if a v8 owner gets a fuel flow meter installed that would be adequate. We don't have to have conditions as well controlled as on a track. A log of ambient temperature, cruising speed and subsequent fuel use would be more than definitive, i think. Cruise control would probably make the results a little more stable, but i think i am just as capable of driving the car as economically as the cruise control.
Sunday, October 29, 2006 - 05:38 pm, by: Dan McColl(Hoon)
A lot of V8's have a fuel flow meter installed at part of the EMV system.
I know my car (the heaviest, fattest most consumptive of all the soarers) does between 9 and 10 kilometers per litre using the cruise at a constant 110 km/h.
Monday, October 30, 2006 - 06:50 am, by: Matthew Sharpe(Madmatt)
Hmm, as far off topic as this thread has gone, I'd just like to point out that if your pride and joy is leaking coolant into the cabin and overheating, might be a good idea to call a tow truck rather than try and drive her home...
Monday, October 30, 2006 - 11:52 am, by: Rehan Bandara(Parsec)
at 4am for $250? I'd rather get a ride to bunnings in the morning and bodgy up a solution
(i just did that this morning)
I made myself an emergency radiator hose seal kit, which consists of an extra length of hose, a stanley knife, two screw hose clamps (the kind with the thumb screw for easy tightening) and a 3/4 inch bolt.
I always carried spare hose clamps as they've proved handy before. Generally i find if a radiator hose ruptures, it happens where its clamped onto the metal connection, so you can usually cut it and reseal it if you carry screw type hose clamps.
Having said that, i think it may be time to replace my radiator hoses
While I am not about to test this theory, there may be other factors too.
The V8 has a hydraulic fan rather than the viscous coupled fan, so it can switch on at any speed if needed and run flat out to provide air flow where none exists naturally. Even at idle.
It also turns on when the A/C is set to max cold, so in the above scenario, switching the A/C on should be beneficial, as the extra cooling provided by that big fan would offset the additional heat generated by the A/C compressor.
So the V8 would probably handle the low speed heat problems much better Please explain !!
Monday, December 15, 2008 - 10:37 am, by: Steve Zac(Tnt992)
Our cars can work without the thermostat. I work at a garage part time. In my own car i don't run a thermostat. It is only for start up when the car is cold it keeps the block running with the same water so the car can come to running temperature faster. As soon as it hits a certain temperature it opens up and will only close if the water is cold.
This works on all cars. You have to cut the thermostat up so u can use its casing.
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