360 carby fuel supply

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 01 Aug 2020 04:12 am

The car-port roof finished, to the cats approval, and more moggie work done.

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That mist is spray from a Humbrol air brush ;-0

Hoping to activate myself to get back to the 360 next week. I have been ordering different sizes of O-rings for the CO adjustment screw on the carb. I think I have the right size now, after a fair amount of trial and error.

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It looks like the ring has to be made of 2mm thick rubber with an inner diameter of 1mm and an outer diameter of 5mm. Then it stretches over the brass pin, and will be slightly squashed by the hole it goes into, to what I think will be the right size!!
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Re: 360 carby fuel supply

Post by SteveP » 03 Aug 2020 10:36 am

Good stuff, that looks similar to the o-ring that Mac supplied me for my GLS (Solex Z11 too), it certainly seems to work and seal correctly but the tight fit made adjusting the screw quite difficult as it was hard to tell if it was turning! Now that it all appears to be set up ok though I hope not to need to touch it again!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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Chris_C
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Re: 360 carby fuel supply

Post by Chris_C » 20 Aug 2020 04:38 pm

Glad to see progress BogBasic, how is the idle now?
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 11 Sep 2020 02:05 am

Hello Chris, I missed your post, sorry. I have only dared to get back to Volvo work today and, as you can see, the garage was a bit buried by leaves.

Image

I did finally manage to remove the jammed-in brass screw with an expertly-honed set of eye lash tweezers, as shown below.

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I then replaced the O-ring with what I think is the correct size (right-hand side of the three below).

Image

I refitted the screw but could not start the car to test everything because the battery was flat, sorry.

Image

Will try asap. Battery on charge.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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Chris_C
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Re: 360 carby fuel supply

Post by Chris_C » 15 Sep 2020 07:17 pm

Hopefully you've spotted it, or its the photo angle, but I'm certain the screw on the right of those three is a very different thread pitch even though the diameter looks the same.

What one has been getting stuck in the carb and blowing out? I can't see anything in previous posts that mention it, but would prefer to say incase you haven't spotted it!
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 19 Sep 2020 11:38 pm

Hello Chris, yes, the two screws on the left with a wider thread are from a couple of spare carbies which are older models. The one on the right is from my car and that is the one which now has a new O-rings and it fits well, thankfully. I was using the old screws to get the thickness of the O-ring just right, well, by eye. I found out several months ago, to my annoyance, that I could not use either of my spare screws due to the difference in thread! I called MAC at the time (trying to cadge a new O-ring) and neither of us had any idea why the thread would have changed. The screw was only jammed in because before the lockdown the only O-ring I managed to get was way-too big. Getting the eye-lash tweezers just right took some time! They were pretty thick metal - thicker than normal fine tweezers!! Not very good for your eyes though - bit of an epic hazard.

I cured a couple of fuel leaks and had it all running well yesterday, but lost it today. I think I know why...
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 01 Oct 2020 11:14 pm

Yo! After a week or two of fiddling about with the carburettor adjustments I have got it to drive pretty well alright and it idles at standstill reasonably well without any choke. A bit of an achievement, really, arf! I had to make the mixture a bit richer than I had been trying before (5 full outward turns of the CO screw) and it ticks over a tiny bit fast, but not too bad, I think...

https://streamable.com/gwpw80

It does not run-on when I switch-off, so it can't be too rich. Almost ready to go again.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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bogbasic
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Joined: 21 Nov 2004 10:12 pm
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Re: 360 carby fuel supply

Post by bogbasic » 05 Oct 2020 12:24 am

Another video, or two stuck together, actually, showing that the tickover is pretty OK and 2 or 3 test runs suggests its alright, so the car was put back into everyday use.

https://streamable.com/wgvuct

However, running under load was a different story with the stalling problems returning on the first real-world run out to the bogs.

So it is returned to the garage for further inspection. My latest theory is that one of the bellows is bogging and I think its this one.
16018533706260.jpg
16018533706260.jpg (202.73 KiB) Viewed 241 times
That carburettor is posed by a model (not the actual one on the car).
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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bogbasic
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Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
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Re: 360 carby fuel supply

Post by bogbasic » 06 Oct 2020 12:00 am

An embarrassing correction to my last post - that plastic rod actually did move. Having practised the movement on my spare carb, I could tell it worked on the one still on the car. So I undid the 4 bolts that hold on the cover-plate of the bellows and popped-out the diaphragm with the plastic rod connected to it. The bellows seemed to be in slightly bad condition and a look at the photo below shows there is a crack in it on the right.

Image

So I thought I would take out the same part from my other spare and compare the two. The diaphragm in the spare was in much better condition and looked almost new in comparison! In my eternal numptiness, I managed to break the plastic rod on my old one, so the better spare deffo had to go back on the car. A bit of brake cleaner was squirted about the place to clean out more of the passages in the castings.

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OK, so the spare diaphragm goes back onto the car with its cleaned-up cover plate.

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And, a new video shows it still runs and idles OK, too. There's an epic drone in it!!

https://streamable.com/jupe9r
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Re: 360 carby fuel supply

Post by SteveP » 07 Oct 2020 02:37 pm

Looks familar! It's a bit scary playing around with these carbs nowadays, the plastic parts are quite fragile!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 08 Oct 2020 01:42 am

Hello, yes, there are kits available on the web, but the part I broke is not included, so it would need plastic printing!!

Cleaned another diaphragm and associated channels out today because it still keeps stalling:

Image

https://streamable.com/o31kpd

Seems to idle OK afterwards, but didn't have time to test it on the road.
Last edited by bogbasic on 12 Oct 2020 12:08 am, edited 1 time in total.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

User avatar
SteveP
*** V3M DONOR ***
Posts: 7848
Joined: 21 Sep 2004 12:45 pm
Location: Coventry, UK

Re: 360 carby fuel supply

Post by SteveP » 08 Oct 2020 02:12 pm

I wonder if that arm is specific to the Z11 or whether the B172 1.7 carb has the same arm (Z10?). I'm not too familiar with 1.7 carbs but they do share some parts!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 12 Oct 2020 12:06 am

Hello, I will have to check. I had a look at my blue 1.7 today but couldn't spot it, mainly because the air filter is such a massive pancake on top of everything.

On the 360, another test run revealed that she is still stalling at low rpm but at driving speeds she is doing really well - better than ever before. A test lamp placed in series with the idle solenoid shows that it comes on when the ignition is switched on and stays on regardless of the engine speed. Apparently this is the correct behaviour, but before I was certain I tested a couple of other Solex relays that control the solenoid (black box on the inner nearside wing) and they all behave the same. I then became obsessed with cleaning-out the flame traps and vacuum lines from the engine to the inlet manifold as these are just about the only things connected to the carb that haven't been checked. Hence, these items were removed for a squirt through with brake cleaner and a soak in white spirit.
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Back together again and the car started first time from cold with no choke!! It has never done that before in the 16 years I have owned it!!
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Anyhow, the idle is still problematic due to it settling randomly at one of two tickover speeds (300 or 1100 rpm), neither of which are right. A check with a timing light shows that the advance is about 5 degrees when it settles at 300 rpm (i.e. almost stalling) and about 20 degrees when it idles too fast at 1100 rpm. A phone call to the MACmeister suggests that the low-speed advance is grossly wrong for a 360 which needs about 15 degrees i.e. I have the wrong renix unit!! Duh, so that might well be the source of all my problems. Anyhow, I have found lots of things wrong with the carby that have been put right. Its just that putting them right has not solved my main problem. Anyhow, hopefully there will be benefits for having a better carburettor.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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