Diesel leaking oil from dipstick

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Gazza36

Active Member
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250
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Hi all, I currently have an issue where I am leaking oil from the top of the dipstick, there is some smoke from the filler cap when opened running and you can feel the breathing from the cam cover to inlet hose, are there any other breathers on the engine, I didn't know if those black pipes that stick up behind the cam cover could be? Many thanks, Gaz.
 
Ring blow by maybe or the PCV in the cam cover needs cleaning out and checking for function. There should be a partial vacuum in the crankcase no pressure.
 
Gazza36 said:
Ok, I take it the pcv is underneath that metal cover in the cam cover with the filter? Cheers.
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On your year yes. Remove cam cover inside you will see a plate with around nine screws in it, under that is the oil separator wash that off. The PCV is at the front held in by a few screws. Care though there are rubber seals you don't want to break them. Give it a good wash off and check over.
 
Grit Valve said:
Wouldn't be any think simple like the dipstick seal would it .
Not a loose fit is it.
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Even if it was, no oil should come out of it. There is supposed to be a partial vacuum in the crank case. You would need pressure to force oil past a loose dip stick seal. There isn't supposed to be any.
 
wammers said:
Even if it was, no oil should come out of it. There is supposed to be a partial vacuum in the crank case. You would need pressure to force oil past a loose dip stick seal. There isn't supposed to be any.
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On an old car like this possibility is there is doesn't mean its the life is over but if it had its tight seal like it should you wouldn't notice unless the it was really bad and blew the dipstick out but if the seal is knackerd then it will weap out
 
The quick and easy way to this solution is to get some one to rev the engine check what the dipstick is doing see where is comming from could be a cracked tube , if you can see it loosen the oil filler cap only slightly if is stops more than Likely its probably the breather as suggested. If not more than likely the rings as the pressure is building up faster than it can escape , the rocker cover can be fun putting the gasket back in with the engine in situ ,as the half moon seal to the rear can be a bugger;)
 
Grit Valve said:
On an old car like this possibility is there is doesn't mean its the life is over but if it had its tight seal like it should you wouldn't notice unless the it was really bad and blew the dipstick out but if the seal is knackerd then it will weap out
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Not unless there was pressure in the crank case it wouldn't, there would be nothing to lift it up the dipstick tube. As a matter of fact if it had it's partial vac air would be drawn in past a worn dipstick seal not forced out past it. The vac is created as air is drawn past the PCV by the suction from the turbo.
 
Grit Valve said:
On an old car like this possibility is there is doesn't mean its the life is over but if it had its tight seal like it should you wouldn't notice unless the it was really bad and blew the dipstick out but if the seal is knackerd then it will weap out
Click to expand...

There must be NO pressure in the crankcase....at anytime....regardless of engine age

As Wammers says, there needs to be a partial vacuum maintained in the Crankcase I think about 10-15 millibars (6" of Water in the case of the M62TUB44 Petrol Engine!!)
 
[MAP][/MAP]
Saint.V8 said:
There must be NO pressure in the crankcase....at anytime....

As Wammers says, there needs to be a partial vacuum maintained in the Crankcase I think about 10-15 millibars (6" of Water in the case of the M62TUB44 Petrol Engine!!)
Click to expand...
I know guys but sometimes is not the breather depending on how good the rings are and how clear the breather is .
You could take the rocker off if its that type assuming it is because of year , clean filter put it all back and its the rings , wouldn't it be far easyer to release the filler cap .
 
Grit Valve said:
[MAP][/MAP]
I know guys but sometimes is not the breather depending on how good the rings are and how clear the breather is .
You could take the rocker off if its that type assuming it is because of year , clean filter put it all back and its the rings , wouldn't it be far easyer to release the filler cap .
Click to expand...

I said at the beginning either PCV blocked or piston blow by. It maybe a combination of both. But if the breather is ok and the crankcase is still pressurising then the engine is pretty sick.
 
Ok so I removed the cam cover today and found that the gauze and the pcv were absolutely caked in emulsified oil, I presume from when the old head had cracked and the coolant was getting into the oil. I'm hoping to get the cover and gauze cleaned in a parts cleaner, but how should I go about cleaning / testing the pcv? Many thanks.
 
Gazza36 said:
Ok so I removed the cam cover today and found that the gauze and the pcv were absolutely caked in emulsified oil, I presume from when the old head had cracked and the coolant was getting into the oil. I'm hoping to get the cover and gauze cleaned in a parts cleaner, but how should I go about cleaning / testing the pcv? Many thanks.
Click to expand...

You can't really, just make sure nothing is broken and it is all clean and clear think maybe you have found your problem. Good luck. :):)
 
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