Hi Folks, my first post here,

 

I have an Octy 05 1.9tdi pd, I was having injector trouble the car was driving so bad so I had them changed, but while they were being changed the mechanic told me the one of the valves inside cylinder 1 was leaking diesel into the oil sump, he patched it up but its not a perminant fix, he sais I need a new engine that the seal cant be fixed. (I don't believe this is true)

 

after every journey I have to wait for the engine to cool and check the dipstick for diesel, its so irritating,

 

so what I am asking you guys,

 

is there a perminant fix, or will I have to bite the bullet.

 

BTW

 

the community here is fantastic, so many topics have been so helpful.  I have  only been on briskoda a few days and its been brilliant so far

There are no seals inside the cylinders, other than the piston rings. Piston rings can be replaced.

 

There is no mechanism for diesel to get into the cylinders other than through the injectors. Injectors can be replaced.

 

Having made those statements, I'm going to add that lying mechanics, and the garages they work for, can be replaced!

There are no seals inside the cylinders, other than the piston rings. Piston rings can be replaced.

 

There is no mechanism for diesel to get into the cylinders other than through the injectors. Injectors can be replaced.

 

Having made those statements, I'm going to add that lying mechanics, and the garages they work for, can be replaced!

Cheers for the reply,

 

so what possible way could the diesel be getting into the sump. the injectors were replaced and the car is back to normal. but I am still worried that oil might get contaminated

Cheers for the reply,

 

so what possible way could the diesel be getting into the sump. the injectors were replaced and the car is back to normal. but I am still worried that oil might get contaminated

The only way I can see for unburnt diesel to get into the sump is for one (or more) of the injectors to be incontinent and keep leaking diesel after the engine is shut off.

 

So the obvious question is whether or not you're getting decent fuel economy.

I think it is possible there may be some miscommunication from the mechanic to you and then playing that back to this forum. I like to try to start by thinking your mechanic is reputable and competent, unless conclusively proven otherwise.  If he wanted to make money from you (edit: read rip you off - he needs to make money to make a living, so I didn't put that well), there may be easier ways than suggesting you need a new engine.

 

Was he quoting to do the replacement engine? Maybe he was suggesting that on economics and the condition of the overall engine.  Is it worth asking him to explain the problem again to you and what part, is the issue as it is unclear to me?

 

I'm no diesel mechanic but I suppose a leaking fuel pump if integrated onto the engine, could leak fuel into the sump or a leaking injector, which could run down past the rings once the engine is turned off. That is what springs to mind for me.

Edited 14 October, 20169 yr by TheClient

I'm no diesel mechanic but I suppose a leaking fuel pump if integrated onto the engine, could leak fuel into the sump or a leaking injector, which could run down past the rings once the engine is turned off. That is what springs to mind for me.

I've never seen a high pressure fuel pump that was so integrated onto an engine that it could leak fuel into the cylinders or sump.

 

Oh and BTW I tend to assume that mechanics are being quoted accurately, because IMVFO explaining "what's wrong with your car and how to fix it" is part of their job!

I've never seen a high pressure fuel pump that was so integrated onto an engine that it could leak fuel into the cylinders or sump.

 

 

 

PD engines don't have a high pressure fuel pump, PD injectors create the high pressure themselves.

 

They do have a fuel pump after the lift pump to get the pressure up to around 10 bar before the diesel goes to the injectors. This is called the tandem pump because it is half fuel pump and half vacuum pump and its driven by the camshaft on the side of the engine.

 

Failure of this this fuel pump is well known to cause diesel to contaminate the oil.

I've never seen a high pressure fuel pump that was so integrated onto an engine that it could leak fuel into the cylinders or sump.

 

Oh and BTW I tend to assume that mechanics are being quoted accurately, because IMVFO explaining "what's wrong with your car and how to fix it" is part of their job!

Ok, so far between us we have leaking injectors - but  they've been replaced!  

 

I can't help feel there is some part of the mechanic's diagnosis that we are missing.  I agree they should be able to explain properly as part of their job but clearly there are different capabilities on relaying information and sometimes, circumstances don't lend themselves to as a clear explanation as you would hope. Like a queue of 4 or 5 people collecting their car.

 

Also, not everyone is good at listening at the time of collecting a vehicle and maybe pre-occupied with just having paid money to find out about another problem!

PD engines don't have a high pressure fuel pump, PD injectors create the high pressure themselves.

 

They do have a fuel pump after the lift pump to get the pressure up to around 10 bar before the diesel goes to the injectors. This is called the tandem pump because it is half fuel pump and half vacuum pump and its driven by the camshaft on the side of the engine.

 

Failure of this this fuel pump is well known to cause diesel to contaminate the oil.

Brilliant, Like I said, I'm no Diesel Mechanic but I know a little more now. I've worked on cars since I was a teenager - always petrol though. I don't think I was far off the mark as I just said fuel pump!

PD engines don't have a high pressure fuel pump, PD injectors create the high pressure themselves.

 

They do have a fuel pump after the lift pump to get the pressure up to around 10 bar before the diesel goes to the injectors. This is called the tandem pump because it is half fuel pump and half vacuum pump and its driven by the camshaft on the side of the engine.

 

Failure of this this fuel pump is well known to cause diesel to contaminate the oil.

"Is driven by the camshaft on the side of the engine"

 

Er, the 1.9PD is a variation of the 1.9TDi, and the last time I looked at one of these it had an overhead camshaft and an external fuel pump driven by the cambelt!

"Is driven by the camshaft on the side of the engine"

Er, the 1.9PD is a variation of the 1.9TDi, and the last time I looked at one of these it had an overhead camshaft and an external fuel pump driven by the cambelt!

The older injection pump engines had a fuel pump run off the cambelt but the PD engines have the tandem pump running off the camshaft. Mine gave up and poured diesel into the oil.

The older injection pump engines had a fuel pump run off the cambelt but the PD engines have the tandem pump running off the camshaft. Mine gave up and poured diesel into the oil.

Ok, that does make sense as a mechanism now, but what was wrong with saying "The injection pump seals have gone and it's leaking diesel into the engine"?

PD engines don't have a high pressure fuel pump, PD injectors create the high pressure themselves.

 

They do have a fuel pump after the lift pump to get the pressure up to around 10 bar before the diesel goes to the injectors. This is called the tandem pump because it is half fuel pump and half vacuum pump and its driven by the camshaft on the side of the engine.

 

Failure of this this fuel pump is well known to cause diesel to contaminate the oil.

additionally that 7-10? bar fuel is fed to the injectors by galleries cast / machined into the head    each injector has 2 rubber o rings to stop escape if one fails or even is cut partially thro' by being clumsily fitted fuel can leak into the valve chest and so to the sump

"Is driven by the camshaft on the side of the engine"

 

Er, the 1.9PD is a variation of the 1.9TDi, and the last time I looked at one of these it had an overhead camshaft and an external fuel pump driven by the cambelt!

 You could say the 2.0 CR is a variation of the 2.0 PD engine but its got a totally different fuel system.

 

Never presume.

 

SKADAM - You really need to find out what your mechanic is on about and feedback more information because currently what you have said doesn't make much sense

Edited 14 October, 20169 yr by SuperbTWM