You only get white sludge if an oilway and a water way break to each other.
Piston to oil way would not give sludge as no water..
Piston to oil way would not give sludge as no water..
Techy help required please. (Non Zed related)
- Thread starter Grumps
- Start date
Any idea where these diaphragms/pcv valves can be found?? I'm getting a headache!
Im pretty sure they are under the bonnetAny idea where these diaphragms/pcv valves can be found?? I'm getting a headache!
T***!Im pretty sure they are under the bonnet
What are they for lol!
In reply to the T☆☆T comment......
I still think it may be the head gasket a compression test should show you.If the system is pressurising it can only be from a piston if the breathers are clear.
If its popped piston to oilway it would apply the pressure direct to the system.
It will try and get out anyway it can the dipstick should have a seal is it still intack?
Oil in a turbo pipe is not un common with a little turbo wear the bearings float on oil and it may weep abit as long as its not excessive i would not be concerned overly.
The turbo will be oil fed critical for its operation any major seal issues would cause alot of smoke and alot of oil consumption.
The turbo creates pressure having removed the air leaks on the injectors it may have just exploted a weak spot in the gasket...
I still think it may be the head gasket a compression test should show you.If the system is pressurising it can only be from a piston if the breathers are clear.
If its popped piston to oilway it would apply the pressure direct to the system.
It will try and get out anyway it can the dipstick should have a seal is it still intack?
Oil in a turbo pipe is not un common with a little turbo wear the bearings float on oil and it may weep abit as long as its not excessive i would not be concerned overly.
The turbo will be oil fed critical for its operation any major seal issues would cause alot of smoke and alot of oil consumption.
The turbo creates pressure having removed the air leaks on the injectors it may have just exploted a weak spot in the gasket...
OK mate so next thing is to do the compression test. Collecting one tomorrow and the test will be done early next week I'd guess. If it shows low compression we are down to either the head gasket or rings then? If compression is good we are looking at this pvc valve and diaphragm that Lee has mentioned. Trying to keep a clear head with this but when your not overly great with all this it gets a bit muddy! Thanks for your input mate.
Need the check/change the PCV - a valve from the air intake that allows clean air to circulate in crankcase and dump excessive crankcase pressure back out at high revs. If that has failed, air from the cylinders (there is always some) getting past the rings will cause pressurisation in the crankcase and hence blow the dipstick out. The fact that it had full power at least for a while, would indicate that compression was ok.
I had this valve go once immediately after a turbo change. A simple device but can have spectacular results when it fails.
I had this valve go once immediately after a turbo change. A simple device but can have spectacular results when it fails.
Thanks Ian. I can find very little online apart from American stuff on the V6 petrol models. I've looked on ebay and euro carparts and nothing on euro carparts and on ebay only available from America. Seems a bit odd?
My understanding (limited though it is) is that there had to be crankcase ventilation. If that was working, any excessive pressure from failed rings would be dumped by the system. Yours is dumping pressure by the dipstick tube. My bet is the crankcase ventilation has failed. I think it is a pipe that runs from the block to somewhere in the air intake system. That way any gasses are fed back through the engine and reburnt.
OK mate, if I have a grovell around underneath am I looking for a largish diameter pipe direcruit from the sump? If so are we assuming when you say failed you mean it may have collapsed or be blocked?
May not be the pipe but a valve. It won't be a large pipe either I don't think. Maybe "1. It can be anywhere in the crankcase not the sump. It's carrying air/gasses so doesn't need to be near any fluids.
OK mate. I'll have a dig about, see if can spot anything.
Just been reading a bit more. Some engines have a system that recovers oil droplets that form in the air inside the crankcase and are then carried out though the ventilation system. If fitted it could be the filter in that which is blocked. No idea how many engines have this.
Some performance cars have this because oil recirculating through the engine reduces the RON of the fuel so reduces power.
Have you checked the air filter for signs of oil.
Not on Diesel engines as any oil going into the combustion chamber is fuel. Can cause engines to rev up until the explode. Not used on modern petrol engines too much . If the breather was a common failing someone would stock it.
Tony.
My Freelander has an oil separation device rather than a filter to the ventilation feeds directly into the inlet after the air filter.
Somewhere at the other end of this small pipe will be a connection into the block.
Yours may a similar hose into the air filter. The problem if it is that will be at the other end of that hose.
Somewhere at the other end of this small pipe will be a connection into the block.
Yours may a similar hose into the air filter. The problem if it is that will be at the other end of that hose.
I thought all engines diesel and petrol had crankcase ventilation back via the engine now as an emissions control to stop oil and by-pass gasses being vented directly out. Its probably because it's usually so reliable that it's not considered when engines do odd things. If it is that it's a cheap fix except for labour compared to a compression issue.
I've had a look for the pipe from the crankcase but I can't see there's that much in there. I have checked the air filter and it's all good mate.
Thanks mate. Hopefully it will be the cheaper fix.