main engine cooling fan

joca · Post by **joca** » Sun Jun 24, 2012 11:13 pm

Hi All, when does the main cooling fan on the Bongo kick in. Mine as been taken off and bench tested,working. All fuses checked, working. The radiator fans kick in on long tickover, but the main fan does not. Is there a temp sensor and if so were is it located.

Thanks John.

Driver+Passengers · Post by **Driver+Passengers** » Mon Jun 25, 2012 8:33 am

There are two radiator fans, each of which can run at two speeds. There is also a scavenger fan right in front of the engine that is pointed up at an angle. These are all ECU controlled and there are two sensors - the water temp sensor under the inlet manifold towards the lower-rear-driver's side portion of the engine controls the rad fans and there is an engine bay temp sensor pushed through the center cowling/console somewhere near the handbrake.

I'd call the rad fans the main fans, but do you mean the scavenger fan? You could probably test it by disconnecting the temp sensor near the handbrake, thought I haven't tried this myself.

As for temperatures, someone will hopefully come along who has that knowledge, but I hope the above makes sense for a start.

Regards,
Matt.

321Away · Post by **321Away** » Mon Jun 25, 2012 9:15 am

scavenger temp sensor is located in the cab, under centre console in vicinity of the rear of the handbrake. Rad fan sensor fitted drivers side engine under the inlet manifold near rear of engine.

Julian

Titan1995 · Post by **Titan1995** » Mon Jun 25, 2012 10:31 am

I have not long replaced the cylinder head, water pump radiator, thermostat and pretty well most other parts of the cooling system on my Bongo. With a new "Fan" sensors as well.

For peace of mind I have added a temperature gauge/control unit with a digital read out and audible warnings which can be preset.

I have noted that the main cooling fans on my vehicle kick in at around 96-97 degrees centigrade.

Hope this helps.

teenmal · Post by **teenmal** » Mon Jun 25, 2012 10:46 am

Titan1995 wrote:I have not long replaced the cylinder head, water pump radiator, thermostat and pretty well most other parts of the cooling system on my Bongo. With a new "Fan" sensors as well.

For peace of mind I have added a temperature gauge/control unit with a digital read out and audible warnings which can be preset.
I have noted that the main cooling fans on my vehicle kick in at around 96-97 degrees centigrade[/color].

Hope this helps.

Hi,would you mind giving us details of this unit.

Thanks.

joca · Post by **joca** » Mon Jun 25, 2012 10:57 am

Thanks to you all. It is the scavenger fan that is not working. I can now check out the sensor. John.

helen&tony · Post by **helen&tony** » Mon Jun 25, 2012 11:29 am

Hi
You'll hardly ever find the scavenger fan turning on...only on a VERY hot day if the engine is rather warm, and you leave the Bongo parked for 10 minutes or so...The heat rising from the engine will trigger the fan when you turn the ignition on, and when you drive a short distance, the airflow from forward motion will turn it off.
If you want to test the fan, remove the connector to the sensor by the handbrake, and short the 2 pins with a bit of wire. If you want to test the sensor, just put a hairdryer very close to the sensor, and turn it on for a few minutes with the ignition on...when it gets hot enough, the fan will start!
Cheers
Helen

joca · Post by **joca** » Mon Jun 25, 2012 12:03 pm

Hi, Helen, Thanks for the info. Iam having trouble the Bongo, it runs for about 30 mins then just stops. I wait for 30-40 mins and it cools down and restarts. It is not water related thou. Chaned engine temp sensor. coil pack. cam sensor. If we pack the distributor with ice it runs ok. We were wondering if the scavenger fan kicked in it would keep it cool, but as you say it comes on rarely. So it looks like a new dizzy. John

helen&tony · Post by **helen&tony** » Mon Jun 25, 2012 2:51 pm

Hi
Mine's a diesel, but for cooling purposes, they suffer similar tortuous pipework , and the scavenger is just to clear the engine bay of hot air in traffic, or when left parked for short periods with a warm engine.
I haven't followed the thread in its entirety , but don't chuck the dizzy yet...try and borrow one...This running and stopping....what's the transmission like?...try looking at the ATF, check colour and smell...it may be getting over hot!....the dizzy may be a "blind"...also...can it be ECU problems?....Not 100% clued up on ECUs, but learning.
I had trouble with our transmission on the way here...produced identical problems to yours, but ours is diesel, and the time interval before starting to die out was a bit longer....but leave it to cool, and it was off like a scalded cat again!
Cheers
Helen

Titan1995 · Post by **Titan1995** » Mon Jun 25, 2012 7:37 pm

The unit I bought is this one......

http://www.youtube.com/watch?v=Xja9QAUQItc

mikeWalsall · Post by **mikeWalsall** » Mon Jun 25, 2012 9:01 pm

http://stores.ebay.co.uk/CARSENSORS/Oth ... id=9687513

main engine cooling fan

main engine cooling fan

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Re: main engine cooling fan

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