The single row chain fitted from new is under too much stress. Also at the same time the chain is wearing the chain rails & internal timing casing. Also wearing the timing gears. All rebuilt YD25DDTI engines from Billcar Limited are now fitted with the duplex timing chain modification. Also the vacuum pump playing an important part of the conversion kit, as we have engineered & uprated parts within the vacuum pump to with stand the duplex chain, also the original. Shaft is known to be a weak point after simplex chain failure these parts are not available in other kits worldwide. D40 euro 5 kit designed by us in our engineering workshops in 2012. Our parts made under company quality management BS EN ISO 9001. Nissan Navara D40 (2010 – 2012) & (2012 – 2016). Company Vat invoice supplied. Customer feedback is reporting to us that there are cheaper euro 5 duplex copy chain kits, but they don’t last? Our parts are made under company quality management BS EN ISO 9001 & we hold inspection certificates BS EN10204 3.1. D40 Half shaft repairs & all other parts please call. The item “Nissan Navara D40 Euro 5 Duplex Timing chain modification/conversion kit/upgrade” is in sale since Thursday, April 4, 2019. This item is in the category “Everything Else\Item Based Services\Installations & Support”. The seller is “billcar” and is located in Shrewsbury. This item can’t be shipped, the buyer must pick up the item.