Bongo Fury

For some infuriating reason Photobucket is not showing me how to create sharable links (why? it always has before grrrrr.) Hope these links will let you see pics.

https://goo.gl/photos/WaYwEnuH5ZUPHMD58 This one shows the relays (one black, one white) that handle the functions of raising the tickover when (1) the engine is started from cold and (2) the air conditioning is on. I'm not sure which is which but only the white on is showing voltage when ignition switched on so I'm guessing that might be the tickover one. However, the tickover is not raised as it should be either when engine started from cold or when aircon switched on. So my attention switched to the pipework that seems to run out of that area. My interest now shifts to the thin rubber pipe that is enclosed in the silver ribbed covering (picture left hand side)

https://goo.gl/photos/JHPV54m9uGerdDz2A - here's the end of that pipe, held up to camera. It seems to have a plastic plug/connection point on the end that looks as though it might be a sheared / broken connection stub. Does anyone know what's going on here and whether / where the pipe is supposed to connect to?

https://goo.gl/photos/9ikBkfq3T83gwBt98 - I also spotted this piece of clear tubing going from the underside of the fuel intake system to the back of the fuel pump. Is this standard? Could it be connected with the other broken/plugged pipe in any way?

And could any or all of this be linked in any way with my lack of tickover raising when engine cold/aircon on?

I'd be grateful for any thoughts and thanks as ever

the 2 solenoids.
the left one with the black plug only picks up the revs on a really cold start, from below zero etc to about coolant temp +10 deg, then it does nothing and turns off, it has no other function.

the right one does cold start from +10 deg c to about +50 then turns off (when engine warmed up). this one also does the aircon revs pickup when aircon is switched on.

the snapped end is a one way valve it is the way that the cold start is turned off if you drive off when the solenoids are still active (under +50 deg c it opens the one way valve using inlet manifold pressure, this allows the vac to be lost at the solenoids so makes them redundant as it supposes your driving so dont need them, it connects into the air filter big black pipe just at the rear/driverside of the head, look for a little 5 mm hole in the top face of the pipe. this is now sucking in air bypassing the air filter, but not such a problem, but it may whistle. it is fixable and can chat about that later.

the thin clear pipe is an add on, it should be thick walled black vac grade pipe pipe, this thin walled pipe goes very soft with repeated heat and collapses, this will give no vac from pump to solenoids, so no throttle pick up on cold starts.

all standard stuff after a head swap mike.

Northern Bongolow wrote:the 2 solenoids.
the left one with the black plug only picks up the revs on a really cold start, from below zero etc to about coolant temp +10 deg, then it does nothing and turns off, it has no other function.

the right one does cold start from +10 deg c to about +50 then turns off (when engine warmed up). this one also does the aircon revs pickup when aircon is switched on.

the snapped end is a one way valve it is the way that the cold start is turned off if you drive off when the solenoids are still active (under +50 deg c it opens the one way valve using inlet manifold pressure, this allows the vac to be lost at the solenoids so makes them redundant as it supposes your driving so dont need them, it connects into the air filter big black pipe just at the rear/driverside of the head, look for a little 5 mm hole in the top face of the pipe. this is now sucking in air bypassing the air filter, but not such a problem, but it may whistle. it is fixable and can chat about that later.

the thin clear pipe is an add on, it should be thick walled black vac grade pipe pipe, this thin walled pipe goes very soft with repeated heat and collapses, this will give no vac from pump to solenoids, so no throttle pick up on cold starts.

all standard stuff after a head swap mike.

Superb Ady and thanks++. Probably something missed by Adrian when doing the head swap - I'll get on the case with him. Is it an easy fix?

Those little one way valves look very similar to the one way valves used on fish tank air pumps
There pennys to buy
They come with the Egr blanking kit aswell I think

like you say they are only cheap at most good car spares places, but they do get warm at the rear of the head so a fish tank one wont do.

mike you may be lucky and the one way valve has broken in half and the mating piece is still in place on the black pipe, if so replace the one way valve.

Thanks both. I'm a little out of my depth on this and Don(t have the engine in front of me but is the one way valve that bulging bit in the tube before you get to the broken stub or is it what the broken end was once part of. In simple terms - I'd happily buy and fit new parts, including solenoids, as a worthwhile investment in an old Bongo, but can parts be got and is fitting simple, or should I be nipping over to Pendle to scrounge a cup of tea

Carnt really see the bulging bit in your pic
But the one way valve is a bulging bit with a hose spigot on each end
On mine it is black plastic
So I feel the bit you have left in the end is half the one way valve

They come with the Egr kits that garage / member on her sell them separately on his web site
Is it Allan's

Gasy wrote:Carnt really see the bulging bit in your pic
But the one way valve is a bulging bit with a hose spigot on each end
On mine it is black plastic
So I feel the bit you have left in the end is half the one way valve

They come with the Egr kits that garage / member on her sell them separately on his web site
Is it Allan's

Thanks Gasy, I'll take a look

Gasy wrote:Carnt really see the bulging bit in your pic
But the one way valve is a bulging bit with a hose spigot on each end
On mine it is black plastic
So I feel the bit you have left in the end is half the one way valve

They come with the Egr kits that garage / member on her sell them separately on his web site
Is it Allan's

Just looked on Allans site. He says:

Replacing the green valve
When checking the EGR system you may notice that the nearby green valve is broken.
If you blank the EGR system you do not need to replace the valve.
It operates during engine warm up, when the engine is ticking over. At this stage, it enables a vacuum to be held in the cold start and EGR solenoids. Once the throttle is applied (engine revved), the vacuum is lost.

If you do want to replace the green valve, I have sourced a replacement, see below to order and buy.

What I don't understand is why the Bongo should no longer need to have its tickover raised when cold just because the EGR system has been blanked off - or have I missed something. Incidentally, the 'green' bit of the cylinder thing can be seen in the 1st pic I posted - that cylinder inline with the pipe just past where the silver covering ends has flanged ends and the top one is green. Whether this is the 'green valve' Allans are referring to I'm not sure.

If Doone happens to read this and can get Allan to comment, that would really help.

Thanks again all.

yes that is the same one mike. just order one from alan or bongospares.

https://www.google.co.uk/search?q=green ... wo5EFTM%3A

Northern Bongolow wrote:yes that is the same one mike. just order one from alan or bongospares.

Thanks Ady. What I don't understand then is why there is a length of tubing running from the green thing and then what seems to be a broken off stub at the end of the tubing. Is it the green thing that is the one way valve, or is it the broken off stub that is part of the one way valve (the rest of which is not in the picture). Would have lifted the covers again today and had a look but not been feeling well so Bongo fettling put on hold for now.

the reason your not following this mike is coss we are all misleading you. look closely on this link, the large pipe that bends round the back of the head has 2 pipes feeding in to it. one is 99283-2300, thats the crankcase/rocker breather. the other really small one towards the passy side is marked as 1375/93-5104, that little stub has snapped off and is in the end of your one way filter pipe, repair it with a bike valve (see next post).

http://lushprojects.com/bongopartsmk2/c ... mgno=.html

repair the broken stub by getting one of these.

https://www.google.co.uk/search?q=high+ ... PdFxcaM%3A.

take off the airfilter pipe, the filter lid end, then put your hand inside. drill out to fit dia of valve, screw a nut on to valve so that the valve is trapped onto the big black pipe wall, then cut off valve top to length, you should be left with a short stub to re atatch the thin pipe and one way valve.

Thanks Ady, I owe you a pint