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PostPosted: Fri Dec 23, 2016 7:53 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2943
Location: Yorkshire
Just converted this Nissan Elgrand E51 3.5V6, same engine as the Skyline I just converted.

85L Irene tank, KME Nevo, MJ reducer, Hana 2002 injectors on rails of 3, valvelube system. I also de-cored the rear cats for the owner.

This model Elgrand has 4 catalytic convertors, apparently what can happen is that when the front two cats start to break up or dust from them comes away, the debris can block the rear two cats leading to all sorts of problems.

Decat was done first

The driver side rear cat can easily be de-cored without having to cut into it..

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The passenger side rear cat has a long section of pipe at each side of it, so needs to be cut into to de-core...

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Job completely done engine bay pic. The white wire to the right is just my interface cable. You can make out the wires running to the passenger side Hana LPG injectors. These injectors are on rails so are remote from the ports on this install (as opposed to discrete injectors that are fitted directly to ports on the Skyline), I selected this option for the E51 because access to the engine is so much more difficult on the E51 than on the Skyline - No difference during the install but to service injectors in future (if ever necessary) means taking off the the full plenum with port located discrete injectors, much more of a job on the E51 than on the Skyline, injectors in this case can be accessed without dismantling any of the engine at all. The lube bottle is very securely fitted on a welded thick steel bracket to the wiper assembly housing but I made it very easily removable (to remove the battery, as otherwise it might be in the way a bit for removing the battery) by simply undoing one M8 bolt halfway across the bracket.

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job done but still got wiper assembly to refit and valvelube to fit

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Rear filler beside fog light. Originally the foglight was flimsily fitted to the plastic bumper with a bit of thin bent steel, now it is fitted to the same bracket that secures the filler (shiny metal like the exhaust!), and this in turn is fitted to the towing eye... the fog light isn't flimsily held in place any more. I think this all looks rather neat and the bit of shiny metal on the offside balances the shiny exhaust.

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While I'd got the plenum off the engine, before putting it all back together again I forgot to reconnect this vacuum pipe. Right at the back of the engine and inaccessible (with my big hands and arms anyway) without taking the upper half of the plenum off the engine again, so that's what I had to do! Managed to take this pic with my phone camera after I'd removed the upper half of the plenum again...

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lower half of plenum

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Plenum off, so now we get to see the engine itself (which you probably don't often get to do). The wires to the right of the pic run to the petrol injectors, here I was probing them to confirm which wires ran to which petrol injectors and making notes for later, because two of the wires change colour before they get to the petrol injectors. Also, on the E50 Elgrand I recently converted (*another thread on this forum), the petrol injector wiring went through 2 plugs which also carried other wires, on the E51 there is only one injector plug which only carries petrol injector wiring so in this respect the E51 is simpler from a wiring perspective (but more complicated engine bay work overall than the E50). On the Skyline I recently converted (again another thread on this forum, again same engine) it made more sense to wire directly to petrol injectors. Incidentally, if an installer fits injectors all at the same side of the engine on one of these engines (like on most I've seen converted elsewhere), then unless they fitted 'straws', the 'spuds' for one bank of cylinders will be several inches further away from the inlet valves (so in far less of an ideal position) than the other bank, which can lead to poorer (less smooth) idle and poorer throttle response even if they used appropriate components and calibrated it all properly.

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see the throttle body removed but still in the bay in this pic too

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Lower plenum in place

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top of plenum on

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don't forget the evap purge valve. Not much space around here.

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again job done

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I didn't take a pic of the reducer in place but it is below the air filter housing. I have seen a few Elgrands lately where the installer has fitted the reducer high in the engine bay where it is easily the highest point in the whole cooling system and hence might suffer shortage of hot water flow thus causing problems running on gas or premature failure of the reducer or injectors, plus causing problems with the cabin heater or with airlocks for the overall engine, not good. I've also seen an Elgrand lately where the installer had secured the reducer directly to the engine, very not good... This may lead to premature problems with that reducer (suffering vibration from the engine) - This would have been a complete no-no a few years ago but when we all started fitting Faro pipe instead of copper lines it seems some installers saw this as a license to fit reducers to engines, in my view it is still very bad practice though. I chose the MJ reducer that I fitted on this vehicle for this model vehicle, precisely because it would fit in the ideal location. Installers that fit the same parts on every vehicle cannot make such choices, which will sometimes lead them to fitting components in far from ideal locations or in far from ideal ways.

Another vehicle I converted that runs perfectly on either fuel. All components selected on merit and on suitability for the vehicle and fitted in the most ideal locations, a well thought out technically correct install while at the same time very tidy.

* Link to thread on Skyline I just converted http://www.lpgforum.co.uk/viewtopic.php?f=27&t=14199
* Link to thread on E50 Elgrand I recently converted http://www.lpgforum.co.uk/viewtopic.php?f=27&t=14190

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


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PostPosted: Thu Jan 05, 2017 5:40 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2943
Location: Yorkshire
Just converted another one of these.

Same spec, same components (except the lube which is a different make). The filler is a bit different on this one, on the last one (above) the foglight (which is maybe fitted by the importer) wasn't secured properly but on this one it was, on the last one I secured the foglight to the same bracket as the LPG filler while on this one the foglight is on the decent original bracket and the filler is on it's own smaller bracket.

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I didn't take a pic of the switch position on the vehicle in above post, on this one I have. Slightly different position on this one, on the other one the switch is fitted in place of one of the Nissan switches which was just a blank, this one has a full compliment of switches.

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I didn't take a pic of the reducer insitu on the other, on this one I remembered at the last minute. Just below the air filter.

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Engine bay pic

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Not much point in taking pics of the manifold off etc, exactly the same as in the post above.

Another Elgrand converted properly ;-)

Got another Elgrand (or maybe two..) coming in for fettling tomorrow (one from Aberdeen), plus a Jeep and a Porsche Cayenne both that I converted in around 2009 coming in for service (no problems ever with those vehicles, just a service), on Saturday the Mustang shaker is coming back in for LPG refitting after having a hot rod cam and firing order changed at a Mustang specialists, got a Cadillac Escalade coming in for conversion on Monday, Subaru 2.5 turbo Forester to convert the week after, lots of repairs to vehicles converted elsewhere during that time too.

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


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