I have a PSA XUD 1.7 Turbo diesel engine in my Rover 218.
It knocks like hell when cold and is still very noisy when hot.
What can i do to quieten this racket please?
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It's supposed to be noisy, that shows the engine has good compression and the fuel/air mix is burning strongly, hence the loud bang as each cylinder ignites! When it runs quietly, that's the time to worry....
Try fitting some additional sound-deadening material under the bonnet or under the carpet against the bulkhead, maybe you could find a higher-spec model in a breaker's and transfer the padding from that?
Alternatively, turn the radio up!
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so howcome modern diesels are very quiet?
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Rover buy that diesel from PSA.
Do they get the latest technology or install it to minimse noise?
No.
Modern diesels will have very sophisticated microprocessor controlled fuel injection systems using very high powered fuel pressures to inject fuel in such a way to minimise noise and knock. And very efficient engine and gearbox mounts to minimise noise transmission. And sound deadening. And sophisticated body engineering to minimise noise transmission..
When was the 218 designed? pre 1990. And Rover were always chronically short of good high powered computer systems to model engine/body noise transmission.
BMW spend more than most on design and R&D and on body engineering to reduce noise. And not surprisingly noise of their diesels in their cars is not very high.
madf
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You also need to remember that this car was designed by Honda (they had over 90% of the design responsibility and would barely let Rover get a word in edgeways). Back then Honda barely knew what a diesel was.
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My 205 DTurbo uses the same engine - and I wouldn't say it was particularly noisy compared to other engines of similar vintage. It's definitely quiter than the Clio D that we also have in terms of the noise inside the car. Noise is about the same from outside. Maybe the level of soundproofing makes a difference. The 205 is at the upper end of the model range and our Clio is bottom of the range - so maybe this is reflected in the level of soundproofing fitted.
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But then the XUD in the Rovers was always more noisy than in comparable PSA models for some reason. Perhaps it was down to installation or perhaps as has been said, Rover just used less soundproofing. After riding in a friends Rover with the XUD and then my 306, the difference is quite large, my 306 being much more refined.
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well the obvious answer is to buy a petrol fuelled car.
But, that aside, I can't see what the problem is. You buy a diesel and you expect it to make a loud noise. True, some are less noisy than others, and I'd be v tempted by a BMW if I had money to burn. It strikes me as bizarre that anyone should waste time and money trying to cure a problem that doesn't exist.
Personally, one of the many attractions of diesels is the knowledge that the engine is still working!
Splodgeface
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Thanks for the info. I am thinking of buying a Mondeo TD as these are somewhat quieter!
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But only the brand new ones. (the TDCi).
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Before you buy a Ford TDCi read the "Mondeo TDCi Starting Problems" thread!!!!!!
Peugeot Diesels seem very quiet, most VW/Audi/Seat/Skoda Diesels are noisy at tickover!!
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Your 1.7 TD in the Rover will be old, possibly worn and that installation is terrible in the Rover as Ross says.
Compared with the 1.9TD in any Pug/Cit the Mondeo 1.8TD of the 1990s is a noisy rough and unrefined beast. Drive one back to back with a Xantia TD and you'll be horrified at the Ford engine.
MM
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I have and I don't agree with you;you have to compare like with like;on all three makes of vehicles you mentioned the amount of sound insulation varied with trim level;ie. the Ghia was fitted with more insulation than an L.
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OK jc, let's take a completely fair comparison.
Put the base trim ZX TD against any model Escort TD (Ghia if you like).... shall we say 1995 models.
The Citroen diesel is unobtrusive, smooth and quiet. Even at the obvious idle speed it isn't unpleasent.
The Ford is a completely different beast. At every speed range it dominates the car, in fact it feels like the engine is sitting on your lap. From the day this engine was introduced every magazine road tester has slated it as unrefined saying get a petrol version instead.
Add to that the Ford's frequent problems in the timing belt/tensioner area and it just isn't in the same class.
MM
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Whatever became of the specialist companies that used to supply acoustic padding kits for cars? Have they become redundant because most manufacturers install much better sound deadening at the OEM stage?
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I remenber these kits being advertised in car Mechanics, but don't recall seeing them of late. If you can be bothered to pull the carpets up, dismantle the dash etc and cut material to shape there is a supplier called Sound Service (website: www.soundproofit.com) who supplied material that I saw used on the rear bulkhead of offshore crane cabs. It was a foam composite material that was self adhesive - worked very well too. Mind you it needed to when you had a large V8 Caterpillar engine with non too effective exhaust silencers 3 feet behind you.
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I have never come across a tensioner failure but I know cars when serviced properly had a steel tensioner pulley fitted.I would suggest anyone comparing cars reads HJ's car-by-car breakdown.
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