Diesel connection for heater to 2017 Renault master (1 Viewer)

[PeterCarole29]

There doesnt seem to be any info to a simple solution to connect into the fuel gauge in the top of the tank (Like the sprinter and VW.
I have seen on U tube some connect to the diesel fuel return before it goes back into the tank. I dont want the tank they supply inside the van and dont want to drill the tank.
Anyone know if fitting to the fuel return will effect anything else with the running of the van or any sensors connected to ECU

Thanks in advance

 

[rod_vw]

My initial thoughts would be to question if the return goes almost to the bottom of the tank. If it only goes to the top then your heater won't be able to suck up fuel.

I'm a VW man and understand your query, having looked at pictures of the sender unit of a typical Renault unit it looks very similar to the VW/MAN version but I've no idea if there is a fitment on it ready to connect the heater feed pipe.

I have fitted a standpipe drilled and inserted into a tank with no problems but a direct fitment in the top of the sender unit is much simpler.

 

[Clivefog]

Most return or leak off pipes will have no effect on ECU etc.
As stated the pipe will not reach the bottom of the tank, how far I don't know have a search for the sender unit and see what it is like. Of course if it does not go to the bottom the heater will stop long before your tank is empty.

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[PeterCarole29]

My initial thoughts would be to question if the return goes almost to the bottom of the tank. If it only goes to the top then your heater won't be able to suck up fuel.

I'm a VW man and understand your query, having looked at pictures of the sender unit of a typical Renault unit it looks very similar to the VW/MAN version but I've no idea if there is a fitment on it ready to connect the heater feed pipe.

I have fitted a standpipe drilled and inserted into a tank with no problems but a direct fitment in the top of the sender unit is much simpler.

yes the considerstion would be if at the bottom you risk draining the tank . If just at the top and nothing to suck i imagine it would make the fuel coming out continuously frothy so suspect it drops down as that would make more sense but i guess things are not always designed with common sense

 

[PeterCarole29]

Most return or leak off pipes will have no effect on ECU etc.
As stated the pipe will not reach the bottom of the tank, how far I don't know have a search for the sender unit and see what it is like. Of course if it does not go to the bottom the heater will stop long before your tank is empty.

I have just been looking at pictures and it looks like the return feed finnishes higher than the bottom of the pump intake.
So is worth at least getting the connector to replace an existing joint without cutting anything

 

[rod_vw]

I have just been looking at pictures and it looks like the return feed finnishes higher than the bottom of the pump intake.
So is worth at least getting the connector to replace an existing joint without cutting anything

Be sure that in normal operation you cannot suck air into the feed for the heater or you will have continual problems with the heater. Height from the bottom of the tank is usually regarded as to leave sufficient fuel in the tank to drive a reasonable distance to re-fill even if the heater runs until it cannot get any more fuel.

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[Jimbohorlicks]

There is one yutube vid showing a connection through the elbow on the vent tube. Saves drilling into the tank as the elbow can be removed and fuel line fitted to the elbow sealed and refitted. And I assume that the elbow is readily available should you wish to remove the fuel line at a later date.

 

[PeterCarole29]

Be sure that in normal operation you cannot suck air into the feed for the heater or you will have continual problems with the heater. Height from the bottom of the tank is usually regarded as to leave sufficient fuel in the tank to drive a reasonable distance to re-fill even if the heater runs until it cannot get any more fuel.

Definately deserves more investigation

 

[PeterCarole29]

There is one yutube vid showing a connection through the elbow on the vent tube. Saves drilling into the tank as the elbow can be removed and fuel line fitted to the elbow sealed and refitted. And I assume that the elbow is readily available should you wish to remove the fuel line at a later date.

I shall have a look thanks. Its just a matter of getting it right first time

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[PeterCarole29]

I shall have a look thanks. Its just a matter of getting it right first time

i.e not having to rethink

 

[PeterCarole29]

I called into a diesel specialist and spoke to them about using the t piece to take a feed from the diesel return pipe
And they said for my van it will not cause any problem to the van.
Having looked at the pictures of the sender units it looks like the return pipe does finish higher than the intake.
So i will try it if i have problems i shall post.

 

[AdrianJW]

I called into a diesel specialist and spoke to them about using the t piece to take a feed from the diesel return pipe
And they said for my van it will not cause any problem to the van.
Having looked at the pictures of the sender units it looks like the return pipe does finish higher than the intake.
So i will try it if i have problems i shall post.

Hope you don’t mind me asking - This is exactly the approach I was hoping to take with my NV400 - I don’t really want to drop and drill the tank and I don’t want to risk fuel spills inside the van. Lots of connectors on eBay. Curious how this worked out for you?

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[PeterCarole29]

I was sceptical but it works the only thing not quite happy with is the stop valve that I fitted directly after the T piece that I had to jubilee clip in place We are using the heater now actually in France as the mornings have a chill to them
The heater has never failed to start so a success
I have one ready to fit to our next van

 

[PeterCarole29]

On eBay they state for the Renault traffic but they do fit the master and NV400

 

[AdrianJW]

Fab - That’s just what I needed to hear. Enjoy France!

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[ivorantony]

A bit late I know but on my early Master 2008 I just T off the fuel filter between the filter and squeeze ball, it’s not pressurised and has worked for the last ten years with no problem,

 

[AdrianJW]

just got to the part where I’m ready to fit the t-piece and realise there are what look like two return feeds. One the same bore as the main fuel line and one narrower. Now wondering which one to connect to!

It’s a 2016 NV400 (same as Mk3 Master)

Posting on the off chance anyone knows

 

[SteelFalcon]

just got to the part where I’m ready to fit the t-piece and realise there are what look like two return feeds. One the same bore as the main fuel line and one narrower. Now wondering which one to connect to!

It’s a 2016 NV400 (same as Mk3 Master)

Posting on the off chance anyone knows

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Have you had any success with this? I am having the same problem with my 2016 Renault Master 3. The thinner return is from the common rail and the thicker return is form the diesel pump. I am struggling to see which one goes deeper into the tank from pictures online.

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