Thread: Am I expecting to much??

What sort of sump pressure does it have? The oil leaks sound a bit premature to me unless the Tappet cover has been done up too tight, but that does'nt explain the water pump.

It sounds to me like you may have a bit too high sump pressure? If so you may have new piston rings as your next job??

Thanks peppercorn does checking the sump pressure require specialist tools? And what would be fine and what is to high pressure? Dosn't sound good though I hope like hell its something else

Injector pump leaks can be from delivery valves at the rear of the pump, where the pipes to the injectors screw on. I have had a few leak in the past when refitting pumps. They have to be quite tight and sometimes the seat on the valve and the ball flare on the pipe don't quite match and they need a nip up to reseal. They make quite a mess when they leak though
The rocker cover leak, could be the old gasket was reused? It may have gone hard and require replacement, Or as previously stated may be just installed too tight. The water pump, is it leaking wtaer? or oil from around the front timing case joint? And as for the sluggishness, I would say that the pump may well have been tweaked beforehand,(Hence the black smoke) and when the diesel pump shop set them up they are set back to factory specs, which for a 200Tdi is pretty woeful The fact it is quieter also could point to the timing being slightly retarded, which will make it very underpowered and 'flat'. A quiet Tdi is usually a retarded Tdi. OR, it could be that the valve clearances were astronomical and they are now correct...
Either way, I would take it back at first opportunity and show the shop these leaks, and ask if they can do a performance tweak to regain some more go out of it. The 200Tdi runs 11Psi ex factory, and is quite capable of 15 to 16 psi with minor wastegate and pump mods
They are a good honest engine and second to the Isuzu 4BD1 I reckon for appeal.
JC

Hi Justin any idea where i could get my pump tweeked? (200tdi)
Can you do it your self?
Sorry about the hijack

TIM.

Originally Posted by long stroke

Hi Justin any idea where i could get my pump tweeked? (200tdi)
Can you do it your self?
Sorry about the hijack

TIM.

Hi Tim, check out IanP's (leo109) 'Thermoguard instruments' web pages he has a tuning guide for the 300Tdi, same pump basically and wastegate adjustments are easier on the 200Tdi as you can actually get to the wastegate to adjust it

JC

Originally Posted by justinc

Hi Tim, check out IanP's (leo109) 'Thermoguard instruments' web pages he has a tuning guide for the 300Tdi, same pump basically and wastegate adjustments are easier on the 200Tdi as you can actually get to the wastegate to adjust it

JC

Thanks justin
Great sight!! credit to you leo109

CHEERS TIM.

Sorry mate, I didn't make myself very clear.

All engines have sump pressure. When a piston travels up for compression, it requires the piston rings to seal against the cylinder wall so that all the gases are captured for the explosion. this is true for petrol or diesel.

Sump pressure occurs when the piston rings allow the compressed gases to pass by between the rings and the cylinder wall and then entering the sump area. This is called "Blow By".
Every engine has a small portion of blow by, even new ones. As an engine ages the "blow by" can increase.
The way this "blow by" is tackled is by fitting a hose from the intake manifold (on a non turbo engine) because the vacuum in that manifold sucks the gases and excess pressure that has been created because of the "blow by". On your engine I think you'll find a pipe which attaches to the vacuum pump and to the tappet cover.

The problem starts to become bad when the "blow by" becomes so bad that it pressurizes the sump over and above what the vacuum can handle. This problem basically means that there is more + pressure in the sump and when it builds up enough it starts to force oil out of all the gaskets and seals!

This problem can only be solved by replacing the worn rings!

The way you can test how bad the "blow by" is is by removing the oil filler cap while the engine is idling. There will always be some + pressure that will come out of there. But if it is really bad you'll know it or an experienced friend will.
I hope this helps you understand?

Originally Posted by Peppercorn

Sorry mate, I didn't make myself very clear.

All engines have sump pressure. When a piston travels up for compression, it requires the piston rings to seal against the cylinder wall so that all the gases are captured for the explosion. this is true for petrol or diesel.

Sump pressure occurs when the piston rings allow the compressed gases to pass by between the rings and the cylinder wall and then entering the sump area. This is called "Blow By".
Every engine has a small portion of blow by, even new ones. As an engine ages the "blow by" can increase.
The way this "blow by" is tackled is by fitting a hose from the intake manifold (on a non turbo engine) because the vacuum in that manifold sucks the gases and excess pressure that has been created because of the "blow by". On your engine I think you'll find a pipe which attaches to the vacuum pump and to the tappet cover.
The problem starts to become bad when the "blow by" becomes so bad that it pressurizes the sump over and above what the vacuum can handle. This problem basically means that there is more + pressure in the sump and when it builds up enough it starts to force oil out of all the gaskets and seals!

This problem can only be solved by replacing the worn rings!

The way you can test how bad the "blow by" is is by removing the oil filler cap while the engine is idling. There will always be some + pressure that will come out of there. But if it is really bad you'll know it or an experienced friend will.
I hope this helps you understand?

Not on a Tdi, these use the speed of the intake air passing a specially shaped fitting in the intake pipe to the turbo that generates a low pressure via bernoullis principle. This is where the 'positive' crankcase ventilation comes from in these engines. It also allows a fair bit of oil mist to circulate through the intake system as the factory seperator on the rocker cover is pretty useless at preventing this, a Provent is a good addition to a Tdi.

Excessive blowby on a Tdi is easy to check, at idle with a warm/ hot engine, remove the filler cap and let it sit on top of it's position while the engine is idling. It will generally flap up and down very slightly, but if it jumps around and you witness smoke or fumes and oil droplets then it isn't a good sign. Also, huge leaks from rear main and front crank seals are a give away sign.

JC