Thread: 4.6 engine questions

Originally Posted by bee utey

I think people weren't sure what exactly you were asking. The engine fan thermo switch should be rated above the engine thermostat temp rating. So your fans don't come on until there is water going to the rad! Try an 88C engine thermostat and a fan thermostat switch around 92C. Many front wheel drive cars should run at about this temp so you should have no probs sourcing one. Just remember modern cars run the fan from the ECU so you would be looking around the late 80's when ECU's were primitive.

Sage words Jilden, it helps to be very clear when asking a question - I have obviously not been as clear as I could have been

What I aim to do is as you have said. use an electric thermostat fitted piggy back to where the engine thermostat mounts so I have an accurate reference point at which to measure the water temperature temperature at a known figure. from this I can then control the fans at say 3 degrees higher so as you said the engine thermostat will be open when the fans come on.

As the AU ford has 2 fans I am not sure if I will use a 2 stage thermostat so I can sequence the fans cycle or for simplicities sake a single stage unit.

Blitz, the MONDEO thermo fans will fit your Radiator assembly better than Au , even the EF version is closer than the AU .They all will need some degree of Modification to fit , the Mondeo's will be the easiest . they are all cheap as on Fleabay and all do the same thing anyway.

Originally Posted by blitz

Sage words Jilden, it helps to be very clear when asking a question - I have obviously not been as clear as I could have been

What I aim to do is as you have said. use an electric thermostat fitted piggy back to where the engine thermostat mounts so I have an accurate reference point at which to measure the water temperature temperature at a known figure. from this I can then control the fans at say 3 degrees higher so as you said the engine thermostat will be open when the fans come on.

As the AU ford has 2 fans I am not sure if I will use a 2 stage thermostat so I can sequence the fans cycle or for simplicities sake a single stage unit.

I still reckon there is little point in controlling the fans from the engine outlet, your motor will be overheating by the time they switch on. Fans should come on when the radiator needs them: ie you're stopped for a length of time or you're going too slow to enable enough natural airflow through the rad.

Originally Posted by blitz

Cool Ron that was what I was after. as the factory thermostat switches have set ranges I just need to fit the correct one at the engine thermostat adn it's all done - also I can make it look like a factory fit doing that way.

Hi Blitz,

The info you seek is here, you may have to join:

Outer Limits 4x4 Board • Login

You can control each fan separately, which is what I do with a 350. One is on all the time, the other with an adjustable temp switch. Will be going to two temp switches in top rad hose when I get time.

Anyone know where I can get the metal tube with two threaded temp sender holes for stock upper RRC rad hose dia? X-Eng have them in the UK, but I'm sure I've seen similar in one of the Autobarn catalogues or similar.

cheers, DL

Originally Posted by Hardchina

I still reckon there is little point in controlling the fans from the engine outlet, your motor will be overheating by the time they switch on. Fans should come on when the radiator needs them: ie you're stopped for a length of time or you're going too slow to enable enough natural airflow through the rad.

I take your thoughts onboard Hard China, I will do some research and make sure that it will be done correctly. it wont be hard to chase up - thanks for the input as I really cant afford to stuff this engine up as the conversion cost the better part of 10k with the brake up grade as well

350RRC , all that stuff comes from Tebfa , with adapters for all hose sizes and fitting the temp probes in any position as well as Craig davies temp controller stuff .No drag racer runs without a Tebfa walter filter system and usually twin tERMOS DEPENDING ON THE CLASS ., best radiator protector money can by and is only $50 .Would never build and engine with out one being installed . cLASS 101 IN COOLING BASICS !!!