Technical questions and answers about the Mazda Bongo
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M 80NGO
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by M 80NGO » Thu Jan 26, 2012 11:27 pm
dandywarhol wrote:To be honest, it's really only a problem with old non coolant cooled turbos - modern turbos, including the Bongo, are cooled so the shut down procedure isn't that important (except as mentioned before, foreign motorway exits with little slow down)
I'd dissagree with that, the internals of a turbo are cooled and lubed by oil not water and it is a vital part of turbo care to run the turbo down to mimimise internal damage
http://www.google.co.uk/url?sa=t&rct=j& ... w-TKhQDUzw
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dandywarhol
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by dandywarhol » Thu Jan 26, 2012 11:48 pm
M 80NGO wrote:dandywarhol wrote:To be honest, it's really only a problem with old non coolant cooled turbos - modern turbos, including the Bongo, are cooled so the shut down procedure isn't that important (except as mentioned before, foreign motorway exits with little slow down)
I'd dissagree with that, the internals of a turbo are cooled and lubed by oil not water and it is a vital part of turbo care to run the turbo down to mimimise internal damage
http://www.google.co.uk/url?sa=t&rct=j& ... w-TKhQDUzw
Errm, so why's there coolant pipes going into the Bongo turbo? 13-546 & 13-549
http://lushprojects.com/bongopartsmk2/c ... o=.html#17
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M 80NGO
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by M 80NGO » Fri Jan 27, 2012 9:56 pm
dandywarhol wrote:M 80NGO wrote:dandywarhol wrote:To be honest, it's really only a problem with old non coolant cooled turbos - modern turbos, including the Bongo, are cooled so the shut down procedure isn't that important (except as mentioned before, foreign motorway exits with little slow down)
I'd dissagree with that, the internals of a turbo are cooled and lubed by oil not water and it is a vital part of turbo care to run the turbo down to mimimise internal damage
http://www.google.co.uk/url?sa=t&rct=j& ... w-TKhQDUzw
Errm, so why's there coolant pipes going into the Bongo turbo? 13-546 & 13-549
http://lushprojects.com/bongopartsmk2/c ... o=.html#17
13-546 Is an oil pipe as denoted by the banjo fitting on the end and tbh i can't find 13-549 but 13-539 is also an oil pipe, turbo's are not water cooled the extreme temps would boil water instantly thats why oil is used and constantly run through an oil cooler, it also uses an intercooler to cool the air temp entering the turbo. Turbos are at their most efficient on a cold damp foggy morning when the air temp is low and the air is wet and dense.
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dandywarhol
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by dandywarhol » Fri Jan 27, 2012 10:13 pm
Sorry matey, 14-270 is the oil feed pipe and 14-290 is the oil drain pipes. The pipes I mentioned are COOLANT pipes. They help control the temperature of the turbo. Click onto the part number and all will be revealed
Let's not get into an argument about it and concede that I'm right
PS - just checked again - I meant 15-539 being the coolant pipe, not 549, my dyscalculia showing again
Here is the turbo cooant circuit in schematic form....

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M 80NGO
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by M 80NGO » Fri Jan 27, 2012 10:31 pm
Not gonna get into a argument with anyone DWH so until i pop the seats up tomorrow and have a look we'll have to agree to dissagree but on any of the turbo's i've removed and replace over the years i can't recall a coolant feed, but after i've had a look tomorrow if i'm wrong i'll gladly say i am ( albeit in very small writing

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Dr Fingers
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by Dr Fingers » Sat Jan 28, 2012 9:41 am
and the good news is..
Colin from County Cars has just dropped by for a look, and, with no prompting from me whatsoever, said 'Turbo, seen it before but rare. Really sorry, will replace under warranty, no problem'.
Top man, so glad I bought from a (good) dealer.
Derek
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teenmal
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by teenmal » Sat Jan 28, 2012 1:25 pm
M 80NGO wrote:Not gonna get into a argument with anyone DWH so until i pop the seats up tomorrow and have a look we'll have to agree to dissagree but on any of the turbo's i've removed and replace over the years i can't recall a coolant feed, but after i've had a look tomorrow if i'm wrong i'll gladly say i am ( albeit in very small writing

)
I hate to agree with anyone from Edinburgh

But the turbo on the 2.5td is water cooled.The non water cooled was the Glow in the Dark type.
Cheers.
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dandywarhol
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by dandywarhol » Sat Jan 28, 2012 2:05 pm
I'd hate to agree with anyone from Lanarkshire

but the reason I know this is because the van I replaced the Bongo with, a Hiace, had an aftermarket glow-in-the-dark type with a turbo timer...................Lets hope M8ongo doesn't get too cold during his investigations

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skater
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by skater » Sat Jan 28, 2012 3:50 pm
M 80NGO wrote: it also uses an intercooler to cool the air temp entering the turbo.
Intercooler is after the turbo. It cools the air
exiting the turbo.
" it's not rocket surgery! "
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widdowson2008
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by widdowson2008 » Sat Jan 28, 2012 4:23 pm
M 80NGO wrote:Not gonna get into a argument with anyone DWH so until i pop the seats up tomorrow and have a look we'll have to agree to dissagree but on any of the turbo's i've removed and replace over the years i can't recall a coolant feed, but after i've had a look tomorrow if i'm wrong i'll gladly say i am ( albeit in very small writing

)
As dandy says, there is a coolant pipe to the turbo (on the 2.5 diesel) - see attached pic - red arrow.

Steve
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M 80NGO
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by M 80NGO » Sat Jan 28, 2012 4:45 pm
well as i said earlier if i'm wrong then i'm wrong so oppologies to dwh for doubting his knowledge, i just musn't have ever removed a liquid cooled unit, back in the 80s/90s when we were wraggin the poop oua RS Turbo's R5 Turbo's etc i remember them glowing white hot after a really good wragging and thought that the bongo being from the same sort of era that they would be a similar set up, i stand before you a corrected and more knowledgable person

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dandywarhol
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by dandywarhol » Sat Jan 28, 2012 9:24 pm

,

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M 80NGO
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by M 80NGO » Sun Jan 29, 2012 10:00 am
dandywarhol wrote:
,

No inquisition dwh just a differance of opinion to which i have gracefully ackowledged and learnt from like the true gentleman that i am

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dandywarhol
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by dandywarhol » Sun Jan 29, 2012 3:32 pm
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