Hi guys.

 

After i installed the new engine, at the begining, all fine (i guess), then after a hundred miles on highways i notice a high consumption, poor acceleration (i felt the car heavy) and i did  notice a black smoke.

 

 

2 hours ago, Kharl said:

i notice a high consumption, poor acceleration (i felt the car heavy) and i did  notice a black smoke.

Well, from what you've actually told us I can't know the reason, but black smoke normally indicates the engine is overfuellling.

Check the air filter, it might need changing.

1 hour ago, Carlston said:

Check the air filter, it might need changing.

Checked.

I even removed it for a try and still smoke

1 hour ago, Carlston said:

Check the air filter, it might need changing.

Injection  pump?

6 hours ago, Kharl said:

Injection  pump?

More likely one or more worn injectors. But I don't know that, I only think it's possible.

When was the diesel filter last changed?

13 hours ago, Kharl said:

Checked.

I even removed it for a try and still smoke

 

If the problem is caused by a clogged air filter, the smoke won't stop immediately. It could take about 50 miles for the smoke to slowly stop. Of course, the problem might not be caused by a clogged air filter. But it's the easiest and cheapest thing to check first.

 

Don't run the engine without an air filter, as that let's grit into the engine which causes permanent engine damage.

 

Edited 16 August, 20214 yr by Carlston

Blimey, this guy has just swapped his entire engine and we're on service items 101?

 

Kharl recheck the cam and pump timing given the recent problems you've had with bad mechanics.

8 minutes ago, Carlston said:

 

If the problem is caused by a clogged air filter, the smoke won't stop immediately. It could take about 50 miles for the smoke to slowly stop. Of course, the problem might not be caused by a clogged air filter. But it's the easiest and cheapest thing to check first.

 

Don't run the engine without an air filter, as that let's grit into the engine which causes permanent engine damage.

 

Ok, thanks for the information. 

 

Someone told me that the coolant sensor could cause that.

 

Is that true?

2 hours ago, Kelly_Heroes said:

When was the diesel filter last changed?

5 months ago

Hi.

Could a bad coolant sensor cause that?

If its keeping the engine from warming up I would imagine it would make the engine run rich.

Alright

The CTS sensor does not cause overfuelling on a diesel per se, it simply runs the glowplugs for longer if it shows the engine is still cold.

The fuel temperature sensor in the filter housing can cause the engine to run richer however.

6 minutes ago, sepulchrave said:

The CTS sensor does not cause overfuelling on a diesel per se, it simply runs the glowplugs for longer if it shows the engine is still cold.

The fuel temperature sensor in the filter housing can cause the engine to run richer however.

There is no way to get that sensor new in my country, how can i test a used one?  How much should it measure with a multimeter?

On 18/08/2021 at 16:45, Kharl said:

There is no way to get that sensor new in my country, how can i test a used one?  How much should it measure with a multimeter?

 

The first thing Id do Kharl is ask yourself What changed before this problem occurred and zone in on that change - Did this occur in the run up to the engine change or after.? Its pointless and frustrating to just change parts without justification.   

 

I don't know if this might be relevant but did you use your original injectors or the ones that came with the replacement engine  ? Why I'm asking is injectors don't like sitting idle with fuel in them and have a habit of sticking. Might work for a minute or two but then a piece of dirt could leave them open - I find this a lot working with classics but its worth ruling in or out anyway 

 

I have access to a scrapped 01 Golf Mk4 SDi and if you need anything I can see about getting it to you out there somehow  

 

 

2 hours ago, VanhireBoys said:

Might work for a minute or two but then a piece of dirt could leave them open

Also @Kharl In which context, can you get ultrasonic injector cleaning if you can't get new injectors?

I doubt this is an injector issue, much more likely to be a problem with the ASV causing an air restriction.

^ Sounds wise. 

It was the coolant sensor

On 20/08/2021 at 01:53, VanhireBoys said:

 

The first thing Id do Kharl is ask yourself What changed before this problem occurred and zone in on that change - Did this occur in the run up to the engine change or after.? Its pointless and frustrating to just change parts without justification.   

 

I don't know if this might be relevant but did you use your original injectors or the ones that came with the replacement engine  ? Why I'm asking is injectors don't like sitting idle with fuel in them and have a habit of sticking. Might work for a minute or two but then a piece of dirt could leave them open - I find this a lot working with classics but its worth ruling in or out anyway 

 

I have access to a scrapped 01 Golf Mk4 SDi and if you need anything I can see about getting it to you out there somehow  

 

 

Thank  you very much, i do appreciate a lot..  i am kind of alone in here with this car.

Today i went to the "place where they try to fix cars" for a lifter replacement  and injection pump adjustment.

 

Oh my...

The engine  had a small high pitch noise with the rythm of the revs. 

Remember the super experienced mechanic did start the new engine fort the first time with lot of wires and hoses around the exposed pulleys  and then catch those wires and  the timing belt jump some theeth, fortunately no bent valves   ut bad lifters,  they did replace the damaged lifters, but that little high pitch ticking  noice was there, rhey said there was still one lifter with some damage , but since it was only that noise and the engine was working fine,  i did use the car some hundred miles (has to work), then i have the appoiment for today to solve that.

 

We decide to use the lifters of my old smoky  engine, which waa supposedly fine...  and when whe started the engine,terrible sound, smoke and vibrations, the mechanic insisted to let the engine for a minute to se if the lifters accommodate, charge whatever... no luck...

 

Now i have to buy new lifters. .

 

My question  is..

 

I have heard that for new lifters i new new camshaft, is that true?

 

And also,  is it necessary  to let the lifter overnight soaked in oil?

 

They say that some minutes and ten to install them and to let them to charge with the engine idling would be enough.

 

 

What do you think?

SDI camshafts don't normally wear like PD ones do, so I wouldn't be in a rush to change that.

 

Yes, always worth soaking new lifters.

 

Normally I prime an oil system by turning the engine over, but not starting it. On an SDI, I'd unplug the stop solenoid to allow this to happen, but I can see why people might disagree with me on this. 

Usual procedure with new hydraulic lifters is to dip them in clean oil before fitting them, no need to soak them overnight, they're fully compressed when new and cannot absorb any oil so it's a complete waste of time.

8 hours ago, Kharl said:

I have heard that for new lifters i new new camshaft, is that true?

NO!!. New lifters will wear to the camshaft over the first 500 miles (800 km) after your first start with them fitted.