Just back from the Bongo Master. Thermostat function checked and all OK. Heater matrix flushed through half a dozen times..both ways. Plenty of crud and corrosion in the flush. Now back to normal heat so either an air-lock in the matrix or blocked waterways. Bottom radiator hose changed at the same ...

Thanks for replies and advice.
Hopefully off to the Bongo expert tomorrow. Chap was busy replacing 3 x cylinder heads from Bongos and his own truck is having heater problems. I have passed on all advice but I remain convinced that the problem is the thermostat.....find out next week
Fortunately the ...

Thanks, All for the guidance and advice.
Off to the Bongo man tomorrow for a discusion.
Looks like a summary of advice = Drain, check/change thermostat, check/change matrix, refill, drive......Take off gloves and thermals and bask in the warmth of a hot Bongo.

Hi, I am pretty sure that the chap who carried out the work would have set the heater controls to hot.
He says that he has replaced a few heater matrix's but only due to leaks and has not yet come across a blocked unit.
I think we will try and drain and refill the coolant as a first step and give ...

Greetings Bongophiles,
Front heater problem: Cylinder head replaced following a spectacular failure 2 months ago. Pre failure engine running at 85 Deg C. Now running at 74 Deg C.
No heat coming from front heater. Working well before cylinder head blew.. Both hoses to heater are cool after a run. Fan ...

Dear Advisors, Counsellors, Mentors and Technogods

Update.

Following a 3rd chemical flush, new radiator and thermostat plus a new bottom hose....I think we have cracked it.

In order to flush comprehensively everyhose was disconnected and flushed through in each direction untill running clear. 50 ...

Hi Haydn
Temp monitoring thingy arrived and now fitted and working. many thanks for the prompt dispatch and the extra screws for the low coolant alarm.

£ 120 or the risk of a scold.....?Looks like its back to the dip stick. I will have the first aid kit on stand-by

On this continuing theme of coolant stuff.....Do all Bongo expansion header tanks become opaque? I assume this is due to age or staining from various coolant solutions, or possibly evidence of previous overheating.

Can they be cleaned? Is there a source of new ones or is it a breakers yard forrage ...

Thanks for that. I have just ordered a TM-2.

While I have access to your expertise.....could you advise me as to the complete capacity of the cooling system for a 2.2 TD GL5 as I have conflicting information.

As an update to the problems...
The system was flushed through a number of times, in all deirections and through every tube and hole. Thermostat and radiator replaced and flushed again. Filled with water for a test run.

Cylinder head temps now 71-75 with no kick in of fans
Back tomorrow for a final ...

Many thanks for all of your advice and guidance.
New Mazda thermostat is on its way. Low coolant alarm already fitted to calm my paranoia.

The mechanic is " A Good un" and hopefully the second flush and a good sound bit of agressive counselling to the cylinder head will do the trick.

Failing that ...

Hi
Just ordered one from Japanese Automotive Solutions (JAS). Genuine Mazda part. Cost £19.91 then £3.50 postage. total £23.41.

Phone: 0845 6808 007
email: www.japautosolutions.com

Colin

No. The mechanic informed me that as the hoses were on, temperature wise, that it was not required. Also that the thermostat was difficult to get at.

Hi Techno-Gods,
While my Bongo 2.5 TD has been performing faultlessly for the past year I have been alarmed at the continuing horror stories of cylinder head failures. To this end I placed the van in the hands of a bongo expert for a complete cooling system flush and replacement of the antifreeze ...