Diesel’s hav­ing a ping fit

Herald Sun - Motoring - - Ask Smithy -

In my 2007 Nis­san Navara, the 2.5-litre turbo diesel stut­ters or hes­i­tates and makes a ping­ing noise when it’s cold but it’s OK when it’s warm. I have had it to two me­chan­ics and they couldn’t fix it. What do you think is wrong?

Kev­in­ro­mano Check the in­jec­tors. Your prob­lems are most

likely there. JUST HAN­DLE IT How can I im­prove the han­dling of my 2010 Nis­san Max­ima?

An­drew, email Nis­san spe­cial­ist Jerry New­man is hor­ri­fied at the thought of try­ing to im­prove the han­dling of the Max­ima. He be­lieves it han­dles well as it is and is bet­ter left alone. If you were to seek to im­prove the han­dling, you could fit up­rated springs and struts but this would be ex­pen­sive. Use qual­ity com­po­nents from the likes of Ped­ders. Per­haps you could check the web for com­po­nents used in Ja­pan but you must un­der­stand that what­ever you do will have a detri­men­tal ef­fect on the car’s ride and you might not im­prove the

han­dling much any­way. AN­NOY­ING LEAK My Subaru Out­back 2.5 EFI has de­vel­oped a slow leak at the rear of the en­gine be­tween the head and the block. I have had it pres­sure tested and that’s the only place it’s leak­ing from. It doesn’t over­heat and there are no bub­bles in the ra­di­a­tor or water in the oil. I have had the water pump, ra­di­a­tor hoses and ra­di­a­tor checked and there are no leaks. I have had three in­de­pen­dent re­ports by me­chan­ics that say the same thing. To fix the prob­lem, it’s nec­es­sary to pull the mo­tor out and I have been quoted $2800 to $4800 to do it. It has done only 176,000km and I am pretty dirty at hav­ing a head gasket go at this rel­a­tively early stage. Any sug­ges­tions for a fix?

Alan, email I would try Bars Leaks or a sim­i­lar prod­uct and hope it seals the coolant leak. To re­place the gasket, which is the best fix, you would have to take the en­gine out as the me­chan­ics sug­gest. NOCRUISE CON­TROL Last year my 2004 Re­nault Me­gane Turbo Sports started to play up with a miss in the en­gine when at a con­stant

Good ride: Max­ima is best

left alone

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