Unburnt fuel...

My mate has a 90 which is doing a good impression of a bond car, loads of white smoke!

He's had a new HG with a skimmed head, today we fitted new injectors and turbo, but still he's smoking...

All cylinders are firing - slacking the injector feeds off one at a time caused the cylinder in question to drop.

We're now thinking Injection pump or the timing of it, cam belt was replaced 40,000 ago. Would the engine still run if the IP timing had jumped a tooth?

Any other ideas? It's taken me ages to get him onto landies and he said he was going to torch it!

Bung some injector cleaner through it for 4 or 5 tank fulls... might just be a lazy pump or a sticky injector and needs a good cleaning

Has just had the new injectors (one of the old ones was tested as dripping) think he's already tried the cleaner... I'll chuck a few gallons of veg oil in his tank next time i get a chance!

lerk said:

Has just had the new injectors (one of the old ones was tested as dripping) think he's already tried the cleaner... I'll chuck a few gallons of veg oil in his tank next time i get a chance!

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Ahhh, just had mine tae a garage and they asked if ah was usin' veg oil... which ah was at 50/50 mix. They said that the veg oil can sometimes gunge up the IP, to which ah replied that ah thought the svo was a good cleaner.. he replied, aye but it can still gunge up stuff! Ah suppose it depends on which stuff ye use.. don't use anything with 'long life' or any other additives. Ah think it was Oddiie that said ye need a higher calorific value or summit (900) fur it tae run decent

Yeah something 900 i think the dodgy additive is... As far as we know the motor hasn't been fed veg oil before, but we're scratching our heads now as to why it's still smoking...

Ah'd go with the cleaner furst fur a bit tae see if that works

lerk said:

My mate has a 90 which is doing a good impression of a bond car, loads of white smoke!

He's had a new HG with a skimmed head, today we fitted new injectors and turbo, but still he's smoking...

All cylinders are firing - slacking the injector feeds off one at a time caused the cylinder in question to drop.

We're now thinking Injection pump or the timing of it, cam belt was replaced 40,000 ago. Would the engine still run if the IP timing had jumped a tooth?

Any other ideas? It's taken me ages to get him onto landies and he said he was going to torch it!

Click to expand...

what engine are we talking about?:doh:

ratty said:

what engine are we talking about?:doh:

Click to expand...

What forum is the thread posted in????

300TDi mate!

lerk said:

What forum is the thread posted in????

300TDi mate!

Click to expand...

I was hinting at the fact that you said it had just had a head gasket just done but had the 40k cam belt re-fitted.

It should have had a nooo one when it was removed.:doh:

how many miles has it done since the skimmed head and HG was changed ?

does it constantly chuck out white smoke, even at speed when fully hot ?

what type and material was the HG ?

why is this thread titled "unburnt fuel" ?

Right an update...

Apparently it has already had copious amounts of injector cleaner poured through it...

Ratty: sorry mate, thought you were just being caught out by the new forum sections like I have!
Didn't think the cam belt needed touching to replace HG?
My personal thoughts would have been to get a compression test done before spending the money he already has... he was advised that 40k was fine for the belt (although again i'd like to have tried this before blindly changing the HG with no real signs of failure!) his brother is a mechanic but has so far tried to keep out of the matter - families eh!

Sean said:

how many miles has it done since the skimmed head and HG was changed ?

does it constantly chuck out white smoke, even at speed when fully hot ?

what type and material was the HG ?

why is this thread titled "unburnt fuel" ?

Click to expand...

At a guess less than 200 miles.

When cold and on heavy overrun only

Pass on HG specs...

Unburnt fuel is whats coming out of the exhaust! Pretty certain it's not water, overfuelling or lubricating oil!

lerk said:

Unburnt fuel is whats coming out of the exhaust! Pretty certain it's not water, overfuelling or lubricating oil!

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make makes you think it's fuel ?

if i'd just done a HG and was seeing white smoke (even after 200 miles) i'd be pondering if the head really was flat or if the mating surface was properly clean - or if the head bolts were tightened correctly

Even with no other signs of HGF?

TBH I didn't suspect the HG in the first place, the smoke is dense white stuff which lingers, not like water at all - coolant level is constant and pipes are soft etc...

lerk said:

Even with no other signs of HGF?

TBH I didn't suspect the HG in the first place, the smoke is dense white stuff which lingers, not like water at all - coolant level is constant and pipes are soft etc...

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drop a fuel line run from the tank side of the lift pump into a can full of NEW diesel and run the engine (don't be tempted to drive it) and see if it still chucks out white smoke

you might have water in the tank or in fuel

does it make any strange noises/sound more clacky than oter 300tdi's?

also check that you've fitted the correct thickness gasket, you'll need a DTI to do this

1 hole 1.30mm ----- ERR5261 for piston protrusion between 0.50 to 0.60mm
2 hole 1.40mm ----- ERR5262 - 0.61 to 0.70mm
3 hole 1.50mm ----- ERR5263 - 0.71 to 0.80mm
No holes 1.60mm -- ERR7154 - above 0.80mm use the no hole gasket.

The method for testing piston protrusion is in the workshop manual

White / grey smoke is a sure sign of either

1. poor ignition causing vaporised fuel to leave the exhaustv pipe

or

2. water getting into one or more cylinders.

If each of the injectors causes misfiring when slacked-off at the pipes, start worrying about head gasket again.

However, if the timing belt is a tooth or two retarded it might run smoky, but it would be noticeably down on power.

Do the TIMING first, and get it checked by someone independent who really knows how to get it right.

Then make sure the injectors are set to the correct POP pressures.

CharlesY

Timing belt fitted today (and yesterday) had to destroy the aux. crankshaft pulley to get it off and then found cambelt slipped one tooth on the crankshaft... He reckons it's like a new car now, although he's not happy about me pointing out that he also now needs waterpump and tensioner bearings, radiator, P gasket... oh and now he has power it's showing up a slight slip on the clutch!...

F*cking landrovers... I think I heard him mutter!