Ticking sound from a 300 tdi engine

Hi Hugh I don't have an answer for you except to say that it is not a silly question and I am sure someone(s) will be able to help you out.

S

"Hugh Hogan" wrote in news: snipped-for-privacy@g47g2000cwa.googlegroups.com:

I have no idea if this is the correct answer but I once had that on a Pug

504. I was told it might be a bit of dirt on an injector and not to worry about it. Anyway, it disappeared as mysteriously as it came so I never did get to the bottom of it.

I suppose you could loosen a feed pipe to each injector in turn and see if it goes away.

Derry

In message , Hugh Hogan writes

It could be the head gasket.

Put your hand down the back of the block and at the cylinder head gasket you will feel it blowing into your hand .

It is very common on tdi's for the head gasket to blow straight out the back of the block .

Also try with the oil filler cap removed to see if it is blowing there.

Also there are small caps on top of the valves these can fall apart and suddenly make the tappet gap much larger. These are very easy to change.

Hope this helps

I have to agree with the head gasket theory, at least it was on my 300TDi.

cyberwraith

....and if it is fix it quick. The 200Tdi engine I am rebuilding was destroyed by this fault.

Steve

Obvously remote diagnosis is difficult, but a distinct "tick tick" in time with the engine could be the head gasket, but then it could be the vacuum pump, or an injector, or etc etc.

Run the engine with the oil filler cap off - does it "chuff" a bit? That would indicate head gasket. You can often see soot marks where it is blowing (if it is). An oily air filter is also another symptom.

Richard

beamendsltd wrote in news:98a3bb774d% snipped-for-privacy@btconnect.com:

On the Peugeot 504's I've seen that had blown a head gasket (and it seems it was a common problem) there will be air blowing back into the coolant expansion bottle making the cooland look as if it is boiling when the engine is revved. Also, possible green anti-freeze staining on the outside of the expansion reservoir where it has over-flowed. But I can't say the symptoms are the same in a Land Rover because I haven't seen it...

Derry

Could also be a leaky exhaust manifold gasket. My mates (petrol) series 3 used to do it. It would stop if you bunged a load of exhaust paste along the edge of the manifold (until the paste fell off!)

Took him ages to work that out! It was only leaving the tiniest amount of soot where it was leaking too.

In message ,

They can be the same...but in this case they will not.

You are talking about the gasket failing between the cylinder and the water jacket.

This case it is probably between the cylinder and fresh air (straight out the back if the block) or the cylinder and a pushrod hole (chuffing through the oil filler cap and making the air filter oily).

Another vote for the head gasket. Sorry! Your symptoms matched mine exactly and it was long time before the penny dropped. There was no crankcase pressurisation in my case. One thing that I couldn't understand until after the event was the dirty sootiness on the top of the inlet manifold (under the insulating cover over the rocker cover). There was also a lot of this mess on the bulkhead at the rear of the cylinder head.

Could be exhaust manifold leak/crack.

S

Sounds like the exhaust manifold. It will be quieter when it gets hotter, as it expands and takes some of the gap up :-)

Run the engine and feel for chuffing around the manifold where the noise is :-)

I had similar in my 300TDi two years back. Is there a loss of power? Mine was the cylinder head gasket but it sounded more like a steam engine rather than a tick. Still some might say tick, so if you are losing power also consider the head gasket.

cyberwraith

I had exactly the same problem with my 300tdi Disco.

Changed the exhaust and all sorts. Turned out that number 4 injector clamp was loose and the injector was letting compression past when the engine was under load.

cyberwraith wrote: