The Dispatch | Expert | Scudo Hub

JohanWinas

Member

From: Gothenburg, Sweden

Registered: 2019-08-21

Posts: 32

DW10 developed a Massive knocking sound while driving.

So last Friday while driving home my Expert HDI with DW10 engine started making a Massive knocking sound, stopped on the shoulder and called for a flatbed, the sound is just absurd.
Took a video of it today.

The details.
In December the cam belt cogged over about 3-4 teeth due to ice formed under the cam cover. I had used the van for about a week while -15C and snowing, some of the water melted on the windscreen, ran down in the engine bay and formed some massive ice cakes there. On the Friday I drove home, just after starting the engine made a odd "jump", I stopped and checked and found nothing, I did not turn the engine off. Stopped at the local supermarket at home, when I came out the engine would not start.
So after diagnosing it I found the cam belt had cogged over.
Not found the time to fix it so its been sitting till last week.
Changed the cam belt, water pump, timed the engine, checked the sensors for cam chaft etc. All good. New multi belt. Did an oil service, fuel filter, the whole kit.
Engine ran fin, bit of noice from the lifters or injectors, as before so nothing new.
Drove it for 2-3 days, about 70-90 km or so, drove as normal and felt nothing odd, if anything is was running better than before.

Then last Friday while driving home at around 100km/h the sound and shaking started. Stopped and got a flat bed to take me home.

It starts as normal, and will keep running, but listening to it one really want to turn it off as soon as possible!

Been googleing, reading and checking old peugeot/citron videon and are now thinking either an injector that leaks, cousing early ignition. Or a rocker arm broken so that an exhause valve does not open making the whole combustion cycle go out in the intake.

Have not had the time to open the valve cover or try to get the injectors out.

Anyone has any idéa or seen this before??

Casper

Member

From: East Lothian

Registered: 2015-12-20

Posts: 2,180

Re: DW10 developed a Massive knocking sound while driving.

Your injectors electronic? If so pull the wires of one and see if noise goes away. If not try another. It will still run like a back of shite but you will know what one. TBF you should be able to see it bubbling and if not try a bit water. Fuel Timing solenoid could make that racket also.   

https://www.youtube.com/watch?v=CTsoOlkgGSQ&t=9s

Last edited by Casper (2022-03-21 23:00:43)

JohnDragonMan

Member

From: Derby, East Midlands, UK

Registered: 2020-06-02

Posts: 456

Website

Re: DW10 developed a Massive knocking sound while driving.

interesting.. i would also go for a leaky injector.. a compression test can also tell a lot. it could also be an injector seal or even a glow plug that is passing combustion gasses around it. look for any signs of combustion gasses leaking past
an injector or glow plug. there is the possibility of a valve not sitting right too. like i say, a compression test will tell you.

---

- JohnDragonMan
Notice: I have the tendency to void warranties, blow fuses, cause fires, and other fun stuff.
Words of wisdom: Internally rust proof the sills and subframe! both skins!!. There's always user serviceable parts inside. "Oh that shouldn't have happened".
My 2005 Dispatch Camper Project

JohanWinas

Member

From: Gothenburg, Sweden

Registered: 2019-08-21

Posts: 32

Re: DW10 developed a Massive knocking sound while driving.

Quick update.
Connected the computer and checked for fault codes etc, all ok there so this is purly mechanical. Also confirms that the camshaft and crank is in sync, as it will give a fault code when the belt slips.
So will try and pull the injectors...