Bongo Fury

The big fan below the water pump on my WLT diesel early Bongo. Is it part of a two stage cooling system alongside the main fans on the radiator? Mine comes on at 78 degrees....[using TM3 temp sensor]

Scavenger fan.. Kind of keeps this cool in the engine bay/dispels hot air.. The sensor is up by the handbrake. I fitted a warning light if it comes on.. I've only seen the light flash briefly once in the last two years...

Titan1995 wrote:The big fan below the water pump on my WLT diesel early Bongo. Is it part of a two stage cooling system alongside the main fans on the radiator? Mine comes on at 78 degrees....[using TM3 temp sensor]

Whats a TM-3 ??

I have TM-2's/TM-4's/TM-5's but TM-3 is a new one ??

Haydn...

Sorry EG3 Sensor

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 5729wt_905

Yes, this is the new one. I bought it from Australia. It has three 12v programmable sources that can be set at individual temperatures. So via relays I should buy myself some insurance having just put a bloody cylinder head on my Bongo.[Along with water pump, genuine Tstat and new cooling fan switch. Cyl head bolts etc]

I currently do not have the centre saddle in place and associated electrics so the fan is probably coming on spuriously.

I only fired the engine up on Saturday after the rebuild. Required minimal bleeding of the injectors to get it going.

I did not have a replacement Bongo bleed hose outlet so modified the Ranger one with a brass T piece and 8mm ID coolant hose. Then a alloy 8mm dump valve plug. This looks so nice.

Also I am about to purchase some coloured silicone vacuum hose so as individually mark the correct installation.s

I will advise when I get the EG3 Sensor set up.

First time for me doing a Bongo cylinder head.

Titan1995 wrote: I currently do not have the centre saddle in place and associated electrics so the fan is probably coming on spuriously.

Has the glow plug light been flashing too??

I don't think you have the connector coupled up to the sensor.. It will come on if disconnected.. & stay on too, when the engine is switched off!

Titan1995 wrote:It has three 12v programmable sources that can be set at individual temperatures. So via relays I should buy myself some insurance

Be very careful how you decide to wire such a combination up to the bongo fans - they are DUAL-Commutator, get it wrong or switching on at the wrong time when the ECU is controlling the fans will generate smoke rather than a cooling breeze.......

And ne aware that some folks have found silicone hoses are hard to seal with jubilee clips. Might need to search on here for solutions such as constant pressure clips.

If it's for vacuum hose then won't require hose clips

I think you will find that gauge/alarm is supplied from the USA and is in fact imported to there from China/Asia....I "think" I have samples from that company.

Hi again, Part 18-845 is the sensor for the scavenger fan you mentioned in front of the engine. http://lushprojects.com/bongopartsmk2/c ... mgno=.html

This sensor is set to trigger a message to the ECU that controls the fan.. The position of the sensor (Part 18-845) is to detect an unusual rise in ambient temperature in the engine bay & switch the fan on then. Usually idling in traffic on a hot day with no air movement? Due to a mid placed engine i assume that's the reason it is there...

I once left the sensor unplugged by mistake after doing some electrical work in this aria (plus a test to check the scav fan worked.) thinking i had carefully assembled everything i set off on a 30 mile journey, about 5 miles into the trip i noticed my glow light was flashing.. My van was driving great, there was no sign of an overheat. (Modded temp gauge & temp readout gauge fitted.) When i reached my destination & tuned off the engine the scavenger fan kept running... Switch the ignition back to glow plug preheat the fan stopped then came on again when the engine started..? When i removed the centre console i had realized the sensor was not plugged back in.. Replacing the connector remedied this..

However if you have wired your device to switch the fans? http://www.ebay.co.uk/itm/ws/eBayISAPI. ... 5729wt_905 Then i would like to echo g8dhe's advice...!

I personally wouldn't mess with the original Bongo ECU system & relevant switches/relays...

The YACHT ENGINE SENSOR OVERHEATING GAUGE & ALARM seems to have plenty of warning read outs in place to allert you to a potential problem...
But i can't see why you couldn't hook one of these warning "RELAY CONTROL OUTPUT's"? To...? As an idea turn off your radio (if on & loud?) making the units point in an alert more obvious...?

Hope this helps?

haydn callow wrote:If it's for vacuum hose then won't require hose clips

Sorry Yes, saw silicon, panicked and read no further ha ha

Well the engine bay "Saddle" had now been refitted and all associated wiring reconnected. That has dealt with the glow plug light and the fan coming on.

Many thanks for all your comments and advise.

So another few things to do and "Boris The Bongo'" should be back on the road.