Tiger Posted May 1, 2007 Share Posted May 1, 2007 Right after an extensive rebuild. (see below) MOT day was today but she failed on emisions in a big way. Looks like not all 4 cylinders are playing ball. Now this is quite an expensive do as its £25 per retest so I need to get it right. What should I check? I've had the head of and the old head was replaced with a better looking one, I'll recheck the tappets but are there other items I should test to make sure that I'll pass the dreaded MOT? Its a 2.5 NAD btw Done New Master cylinder New Slave New rear Wheel bearings and Oil seals New rear shoes New discs & pads Full service New PAS box New PAS pump (& pipes to fit - a saga in itself) New Rocker cover (my fault - I put a new gasket on and over tighten the middle bolt - it shattered) New Glow plugs Welded in New Footwells Welded Front Chassis Leg Welded Front O/S Outrigger New Gear Knobs Vanity New Gear Gaiter Vanity Replaced Front Brake Pipes New Wheels and tyres (tubeless off my 300TDi) New Battery Timing Belt New Steering Damper New Gearbox Oil New Rear Diff Oil New Front Diff Oil New Fuel & Oil Filter New Engine Oil Fit New Radiator Quote Link to comment Share on other sites More sharing options...
western Posted May 1, 2007 Share Posted May 1, 2007 Were the injectors checked for spray pattern, correct operating pressure,shutting off correctly might be worth doing that & restting the pump timing & using some good quailty injector cleaner/lubricant [Millers seems to be quite popular on here] Quote Link to comment Share on other sites More sharing options...
Kim Horsevad Posted May 1, 2007 Share Posted May 1, 2007 Right after an extensive rebuild. (see below)MOT day was today but she failed on emisions in a big way. Looks like not all 4 cylinders are playing ball. Now this is quite an expensive do as its £25 per retest so I need to get it right. What should I check? I've had the head of and the old head was replaced with a better looking one, I'll recheck the tappets but are there other items I should test to make sure that I'll pass the dreaded MOT? ... The reason for extensive smoking should always be investigated and any encountered problems resolved, but if you just need to get the vehicle though emissions test then add some 10% til 15% of kerosene to the diesel fuel before the test. Kerosone burns much cleaner than diesel, but lacks the lubricating properties of diesel, which is why one shouldnt overdo it. Getting the test done with the aid of kerosene is a quick fix - think you call it "bodge" The "best practice" would probably be to fit new injectors and get the injection pump settings correct, as suggested above. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted May 1, 2007 Share Posted May 1, 2007 Bung 25% cooking oil in the tank, it drastically reduces emissions once the engine is nice and hot. Of course, if you have running problems due to injectors or whatever, then the effect won't be so great. Les. Quote Link to comment Share on other sites More sharing options...
Tiger Posted May 1, 2007 Author Share Posted May 1, 2007 Cooking oil or kerosene? Quote Link to comment Share on other sites More sharing options...
Guest WALFY Posted May 1, 2007 Share Posted May 1, 2007 When in the arctic the military use kero in some items of plant, to make it easier to burn the fuel. It does make it run a litttle bit hotter, so in this case if it burns hotter it should burn better. HTH Quote Link to comment Share on other sites More sharing options...
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