frequently_asked_questions_faqs
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You can use the table of contents on the right hand side to select the heading you want to view, or by all means please read through all of the below. | You can use the table of contents on the right hand side to select the heading you want to view, or by all means please read through all of the below. | ||
- | =====E50 FAQ===== | + | =====E50 |
- | =====E51 FAQ===== | + | =====E51 |
- | ====Catalytic Converters==== | + | ====Blocking of Catalytic Converters==== |
This issue has been the cause of much controversy over the years. Please note that we as a club can only recommend a course of action. It is up to you, the individual if you would like to take the advice or ignore it. | This issue has been the cause of much controversy over the years. Please note that we as a club can only recommend a course of action. It is up to you, the individual if you would like to take the advice or ignore it. | ||
- | The E51 has what is known as a Quad-Cat system. This means that there are 4 catalytic converters in total. Two for Bank 1 of exhaust manifold | + | The E51 has what is known as a Quad-Cat system. This means that there are 4 catalytic converters in total. Two for Bank 1 of the V6 engine, and then another two for Bank 2. This applies to both the VQ25 2.5L and VQ35 3.5L engines. |
- | The issue from this system is that over time the first catalytic converters from each bank can deteriorate over time and can break down. The debris from the broken ceramic material then created | + | The issue from this system is that over time the first catalytic converters from each bank can deteriorate over time and can break down. The debris from the broken ceramic material then create |
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+ | Some owners have luckily had warning signs which allowed them to react and fix the issue before the engine died. These symptoms can range from rattling sounds in the exhaust area (under the cockpit), drop in revs, low power etc. | ||
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+ | Other owners have not been so lucky, and the blockage has happened quickly and destroyed the engine before they had time to stop. In this instance, the only options are engine rebuild/ | ||
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+ | The below diagram shows the flow of exhaust gas. From the engines exhaust manifolds, into the primary cats, through the secondary cats and into the centre box. | ||
{{wiki: | {{wiki: | ||
- | The best solution to this problem is to remove ALL FOUR catalytic converters and replace them with TWO high flow sports cats. Now this can be a very expensive procedure but gives 100% safety. | + | The best solution to this problem is to remove ALL FOUR catalytic converters and replace them with TWO high flow sports cats. Now this can be a very expensive procedure but gives 100% safety |
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+ | Other options are available, but must be done at the owners risk. | ||
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+ | You can remove the primary cats completely and replace with a straight pipe, leaving on the rear cats in place. Alternatively, | ||
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+ | The final option is to remove the secondary cats and replace the centre box of the exhaust. Removing the secondary cats allows for debris from the potentially failing primary cats to "pass through" | ||
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+ | Before any of the above options are performed, you MUST inspect the cats to see if they have already started to break down or not. If there is already signs of damage or degradation, | ||
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+ | =====E52 Specific FAQ===== | ||
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+ | =====General FAQ====== | ||
+ | ====Underseal==== | ||
+ | All Elgrand' | ||
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+ | Depending on where you live in the world, your country may salt roads in winter to help with ice. In the UK, for example, gritters are typically from around November through to February each year depending on weather conditions. If your roads are salted, and you do not underseal your JDM import, the salt from the road will spray up and will corrode any unprotected metal surfaces that it lands on. | ||
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+ | Undersealing is the process of adding a barrier to the underbody of your vehicle to protect the chassis, components and body work from salt damage. This will help to prevent rust appearing on your car and allow you more years of trouble free motoring. | ||
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+ | There are various types of undersealing systems. From cheap annual jobs, to more expensive long life applications. The method you choose is up to you. You can research the various methods and select the best that fits both you and your budget. But it is important that you do this. Do not leave your JDM vehicle unprotected from salty roads. | ||
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+ | ====E10 Fuel (UK)==== | ||
+ | The standard of unleaded fuel in the UK is changing in 2020. E10 (10% ethanol) unleaded is being introduced as the standard unleaded fuel to help combat emissions. | ||
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+ | The problem is that ethanol is corrosive to certain types of rubber and can, over time, erode fuel lines and seals in the fuel system. At least two of the ElgrandOC members have contacted Nissan Japan to ask about the suitability of E10 in the Elgrand, and on both occasions Nissan stated that you should NOT use E10 in the Elgrand as it has not been tested. | ||
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+ | Although the vehicle will drive perfectly fine if using E10, over time there MAY be degradation which can lead to substantial failures of the fuelling system, be it the pipework, the fuel pump, or anything in between. | ||
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+ | Premium fuel in the UK (97+RON) is remaining at E5 (5% Ethanol). | ||
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+ | If you are concerned about the damage that E10 fuel may do to your car in the long term, you must switch to using premium unleaded if you do not already use it. | ||
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+ | If you own a VQ35 Elgrand you should be using Premium unleaded regardless as is stated in the owner' | ||
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+ | Owners are of course free to use whichever fuel they so choose. But if you are looking to buy an Elgrand, you should check with the owner to see what type of fuel they have been using as damage a previous owner has done may come back to haunt you in your ownership. |
frequently_asked_questions_faqs.txt · Last modified: 2021/09/22 16:46 by karl