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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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How well does your d5 pull?Views : 6169 Replies : 55Users Viewing This Thread : |
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Nov 26th, 2016, 14:25 | #51 | |
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Nov 26th, 2016, 15:37 | #52 | |
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With many modern turbo diesels the ultimate main block killer is often the head gasket and if you increase the boost or fit a tuning box it tends to reduce the life of the HG. Extra boost can easily cause an old HG to crack and the higher CHT's caused by tuning boxes or MAP fiddling are also bad news for the HG, particularly if the oil flow patterns around the head have been compromised by varnish deposits. The hot spots that result stress the HG into a premature failure, although nothing beats a driver that uses the wrong gear or an owner that never changes the coolant.
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Nov 26th, 2016, 22:49 | #53 |
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I suppose there's a certain daft underlying desire to achieve a bit more power rather than being happy with a perfectly adequate car. My first car was a beaten up Morris marina 80 odd horsepower & I thought it was great.(but I had to try the twin carbs anyway!)
I'm going to try the ronbox just out of interest as I have it anyway (& I tow trailer/caravan regularly) I'm not looking to do wheelspins & drive like a maniac. I think I may need to give VNT some attention cheshired5 going by what you say. |
Nov 27th, 2016, 11:46 | #54 | |
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Last Online: Aug 8th, 2018 22:12
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Location: Ramsgate
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VNT Actuator
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The fuel filter has been done Have checked a few things. It seems to be the actuator. There is almost 1cm of play on the actuator arm, watching videos of actuator repairs that seems excessive on a worm driven gear. So is it a whole turbo replacement or just actuator? I have seen older threads on here saying its not a replacement part, but then ads online indicating it may be available and much cheaper at around £80?? As access is difficult I doubt I would attempt this myself. Any advice appreciated Cheers |
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Nov 27th, 2016, 12:30 | #55 | |
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Location: Crewe
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The other thing to consider though is that a poor fuel/air mix can create excessive soot and clog the VNT mechanism which in turn can cause premature wear on the actuator worm drive. If this is the case and you only change the actuator, your problem may persist and mess up the new actuator yet getting someone to open the turbo and refresh the innards may work out more than buying a whole turbo+actuator unit on a part exchange basis. If not doing it diy and you need the car fixed and turned around quickly it can be a case of sucking up the cost and doing it by the book first time.
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Nov 28th, 2016, 14:40 | #56 | |
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One last thing, to confirm it was the actuator I viewed the arm whilst revving the engine, no movement. I am guessing there should be some movement and that if stationary this seems to indicate it is stuck/broken? cheers |
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