Fuel Hose Specs - Modern Fuels

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TasMan
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Fuel Hose Specs - Modern Fuels

Post by TasMan » 14 Jun 2021 10:51 pm

Thought I would start a new thread on the back of the injection pre-filter disucssions of late.
I am looking to replace the hoses around the injection pump and engine bay on my 360.
Seems there are a few options (as usual) and I thought I would highlight a couple that I am thinking about.
I have narrowed down to 'Cohline' hose which comes in two varieties and seems to be high quality.

2192 NBR Hose https://www.cohpro.com/low-pressure-hos ... -2192.html
2240 FKM Hose https://www.cohpro.com/low-pressure-hos ... -2240.html

With Ethanol being a greater issue to existing hoses it seems sensible to replace hoses as part of preventative measures.
I'm not sure on the original spec of the fuel hoses in our cars but I assume Ethanol was not particulalry considered 30+ years ago and replacement/inspection should be on the agenda.

NBR seems a good option, resistant to super unleaded / E10 fuels
FKM appears to be the ultimate option for 100% ethanol resistance with the Viton style liner

Dare I suggest that both are likely to be superior to original hoses ?
The cost difference is notable for FKM...... 2/3 times the price for FKM compared to NBR.

I am swayed towards 2192 NBR given it is rated for E10 and a fraction of the cost of 2240 FKM, albeit it may not be just as good as FKM.

Has anyone else considered the subject of fuel hose specs :?:
Regards Dave
1987 360 GLT

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bogbasic
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Re: Fuel Hose Specs - Modern Fuels

Post by bogbasic » 15 Jun 2021 10:51 am

Not my field, but there was someone who knew lots about fuel hoses at the last meet-up in Beaulieu. I didn't get his name/alias, sorry, but I can PM foggy. It might have been maxplacton who hasn't been here for quite a while....
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!

volvomania
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Re: Fuel Hose Specs - Modern Fuels

Post by volvomania » 16 Jun 2021 07:49 am

Both will do however the NBR will wear faster than the other one.
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TasMan
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Re: Fuel Hose Specs - Modern Fuels

Post by TasMan » 16 Jun 2021 08:01 am

Thanks for the feedback.
I ordered NBR yesterday, must be better than the original hoses which still 'appear' ok but its time to get them changed.
Certainly something to keep an eye on.
Cheers Dave
1987 360 GLT

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TasMan
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Re: Fuel Hose Specs - Modern Fuels

Post by TasMan » 25 Jul 2021 12:07 am

Bit of an update.....
I'm half way through replacing the fuel pump and pre-filter and associated hoses.
Not a great job draining 30+ litres of fuel safely...!
I will report back when complete, had some really useful info from foggy on filter options and wiring adaption to the new pump, much appreciated.

I was going to move on to the feed and return lines in the engine bay but on close inspection I didn't realise the plastic lines aren't secured to the bulkhead. There is very little slack in the lines and there appears to be a risk the hoses will disappear down the hole in the chassis before I can get the new hose on. Also, the force needed to push the new hose on will be tricky to get.

Any tips on replacing these hoses while avoiding the plastic lines disappearing!?
Thanks
1987 360 GLT

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bogbasic
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Re: Fuel Hose Specs - Modern Fuels

Post by bogbasic » 25 Jul 2021 01:50 pm

Hello, can you get a piece of wire or string to go right through each pipe, cable TV style? Or, fix some string on the ends firmly. Cheers, Jon.C.
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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TasMan
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Re: Fuel Hose Specs - Modern Fuels

Post by TasMan » 25 Jul 2021 10:37 pm

Thanks Jon, I thought about string/tape combo but decided just to leave well alone at the moment.
The hoses are in decent condition albeit original, so I will save that joy for another day.
Got the pump install finished today, seems to be working well with the new filter arrangement. Will see if she fires up tomorrow ! :)
1987 360 GLT

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bogbasic
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Re: Fuel Hose Specs - Modern Fuels

Post by bogbasic » 26 Jul 2021 02:24 pm

Hello again, mine are still originals. Ta jc
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: Fuel Hose Specs - Modern Fuels

Post by SteveP » 26 Jul 2021 09:07 pm

TasMan wrote:
25 Jul 2021 10:37 pm
Thanks Jon, I thought about string/tape combo but decided just to leave well alone at the moment.
The hoses are in decent condition albeit original, so I will save that joy for another day.
Got the pump install finished today, seems to be working well with the new filter arrangement. Will see if she fires up tomorrow ! :)
If you've taken any pics along the way it would make a good write up, a job I'd like to do in the future on my GLT and I'm not at all familiar with the injection pipe routing
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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TasMan
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Re: Fuel Hose Specs - Modern Fuels

Post by TasMan » 26 Jul 2021 09:35 pm

Hi Steve, Yes I will try and write something up as a bit of a guide, took a load of pics. All credit to Foggy who provided a real top tip on a pre-filter replacement which has worked out well. I will probably do a thread on it when I get my pics uploaded to Flickr, maybe be a week or two but will let you know.
However....maybe you shouldn't follow my advice as the sod still isn't starting... :lol:
I posted this on FB but copied below.... the pump staying on after ignition is off seems odd.
The joys of the 300 !! Hopefully something simple, unlike any of the wiring diagrams I have lol !!
Dave

Seeking thoughts on a starting problem with my 360...
Long story short, car wouldn’t start and after a few checks found the fuel pump not working after bridging the terminals as described in Haynes.
Original pump, so I have fitted a new pump and replaced various hoses and both the filters.
Pump now runs when the relay is bridged and plenty of fuel moving through the pre-filter.
Replaced relay and tried to start, turning over fine but not even a cough. Pump doesn’t appear to be running when turning over.
Changed the relay for a spare but no change.
I bridged the terminals again to check the pump, turned ignition on, pump buzzing away fine.
Now, oddly, when I turn the ignition off the pump keeps running? The pump only stops when I pull the bridge wire, it also restarts when I replace the wire with the ignition off...
When I first bridge the terminals it doesn’t run until I turn the ignition on, so why does it keep running with ignition off ?
Fuel pump fuse is fine, my next check is the crank sensor which was renewed, but I am wondering if the ECU could be faulty ?
Has anyone had a similar problem....?
1987 360 GLT

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bogbasic
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Re: Fuel Hose Specs - Modern Fuels

Post by bogbasic » 30 Jul 2021 10:05 pm

Sorry, only just saw your questions.

Is it deffo the right type of relay i.e. normally on as opposed to normally off, etc. I have no idea what type it should be but I got a couple of new relays from a local shop that were physically identical to the ones on the car, but they don't work and this is because they are the wrong type. From the little diagram printed on the side you can tell if its a normally on or off.

The only other thing I can comment on is that I had a problem in that the engine kept running when I turned the ignition off and that was due to the faulty connector behind the fuse box which we discussed last year ;-0

Good luck, Jon.C.
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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