Last year, May to be precise, on my way back one evening from putting out a moth trap and generator i had a backfire from my motor. This happened again a couple of times, all when i was motoring downhill and has subsequently stopped and it hasnt reoccured.
I didnt think diesels ever did this but the bang was loud enough to convice me that they do.
Since this happened i have replaced the rad and thermostat and the motor is running well cool.
Anyone else had this? Mine is only a 1.9 L reg motor.
Andy
Do BX diesels backfire? Yes they do!!!
- electrokid
- 1K Away
- Posts: 1764
- Joined: Fri May 09, 2008 2:14 pm
- Location: Woking
I didn't think they could either - could be wrong though - it's happened twice this year alreadyI didnt think diesels ever did this but the bang was loud enough to convice me that they do.
If the bores or valve guides get really worn they can run on their own engine oil - called 'runaway' the revs just build and build and switching off the diesel supply doesn't stop it - the only way to stop it is to find a wall or tree and park up against it - engage a gear if you can and let the clutch back slowly to kill the engine. It doesn't usually happen these days because emissions tests fail the vehicle before the engine gets to that state.
I'm currently doing battle with the Mint Loving Pyrauthrus Moth - and fortunately winning - I grow some 6 varieties of mint and I'd rather like to consume most of it myself !putting out a moth trap and generator
1992 BX19 TGD estate 228K Rusty - SORNed
2002 C5 HDi SX estate
2002 C5 HDi SX estate
Gibbo Wrote
Backfires on overrun are caused by air getting sucked into a poorly sealed exhaust, usually at the manifold flange, the air mixes with unburned fuel in the silencer, becomes explosive and BOOM.
Just a little confused here.
Diesel engines: If there is an air leak any where in the inlet tract, this will not increase the explosive mixture as there is virtually no induction vacuum.
On the other hand, a petrol engine with a carburetter or butterfly valve on the overrun, will produce an induction vacuum and this will in fact produce the BOOM effect..
Backfires on overrun are caused by air getting sucked into a poorly sealed exhaust, usually at the manifold flange, the air mixes with unburned fuel in the silencer, becomes explosive and BOOM.
Just a little confused here.
Diesel engines: If there is an air leak any where in the inlet tract, this will not increase the explosive mixture as there is virtually no induction vacuum.
On the other hand, a petrol engine with a carburetter or butterfly valve on the overrun, will produce an induction vacuum and this will in fact produce the BOOM effect..