how to make a diesel quieter

b21playa · Post by **b21playa** » 07 Jul 2005, 04:54

well my DTurbo's got the uual tractor noise but how can i make it sound more smoother
its had an oil and oil filter chnage not long ago (2k miles)
what else can be done?

demag · Post by **demag** » 07 Jul 2005, 06:03

Turn the radio up.[:I]

moomin · Post by **moomin** » 07 Jul 2005, 06:54

theres stuff you can buy to add to the oil when you do a change to make it less rattley, i dont have a clue as to whether or not it works though...

mbunting · Post by **mbunting** » 07 Jul 2005, 13:06

You can also get sound deadening kits to fit in the engine bays of many cars, see usual mags for adverts.
Veg oil will also make it sound smoother, so you may want to have a look at the tax-paid ones such as global-diesel ( ie. all the bio-diesel 5% or more blends ) available from filling stations / fuel suppliers.

ralph · Post by **ralph** » 07 Jul 2005, 13:40

Rustproofing front wheel arches and inner wings etc, with gunk like Waxoyl, deadens engine noise. It's made a real diffence to my Xsara. Worth doing if you intend to keep the car for a while.

samcro · Post by **samcro** » 07 Jul 2005, 13:57

Newer VW group cars (VW, Audi, Seat Skoda...) have fabric matting stuck to the inside of the bonnet, a foam backed 'lid' covering the cam head and an 'eggcrate' backed panel underneath the entire engine bay. All this does a lot to deaden the noise. I guess the main thing to watch out for if putting stuff in yourself is that you don't block up or restrict any cooling by doing it.

bikeboyz · Post by **bikeboyz** » 07 Jul 2005, 14:52

Is it more noiser that other 306DTurbos? if so the timing could be slightly advanced out making it knock. If not then are you concerned with cold starts or just normal running?

madasafish · Post by **madasafish** » 07 Jul 2005, 19:37

I put sound deadening felt on the underneath of wife's 106 diesel. Impact? negligible...

samcro · Post by **samcro** » 11 Jul 2005, 17:18

I'd say that putting it under the engine bay would make more of a difference as it's otherwise completely open and the sound reflects up off the road.

stubbsy · Post by **stubbsy** » 12 Jul 2005, 06:38

would that not retain the heat from the engine bay?its hard enough tryin to keep forced cold air onto the top mounted intercooler in this weather. throw a tin of injector cleaner into the tank.better still (forget the name of it) a tin of the stuff you put directly into the fuel filter housing.think it may be the molly slip brand,not sure (will post up when i remember it)but did the world of good for me. also,check that its not "chatter" from a worn and dry alternator belt.give a squirt of wd and c.

kid · Post by **kid** » 13 Jul 2005, 07:10

buy a petrol!

rossd · Post by **rossd** » 13 Jul 2005, 13:21

Who wants a petrol when you have a nice torquey powerful turbo diesel [:p][:D]

James.UK · Post by **James.UK** » 14 Jul 2005, 07:47

Try adding two litres of sunflower cooking oil when you fill up.. It makes mine run quieter.. [;)] [^]

solara · Post by **solara** » 14 Jul 2005, 14:06

I just added 50% veg oil/50% diesel and it runs just as smooth and quieter. PS mines is a turbo diesel with bosch pump and 130K+ on the clock. Will try upping the ratio to 70/30 next.

moomin · Post by **moomin** » 14 Jul 2005, 14:29

does it have to be sunflower oil, or can any vegetable oil do?