Hello took my inlet off today and there was a small amount of oil in there, what would cause this?

Could it be the valve stem seals? if it is would take also cause smoking on overrun

Cheers
Rich

 

Turbo seals on way out check turbo to cooler pipe and comp housing

this is what happened to mine!!!

unless you still have original vaccum on intake manifold for breather?

 

There no oil in any boost pipes or comp housing and its got an uprated breather system

Cheers
Rich

 

Strange

 

yeah, Anyone else got any ideas

 

how much oil are we talking??

a thin film or a runny pool??

 

not alot at all, thin film all over and a couple of drops in the elbow part of the inlet

If you look in the ports the valves look wet if you know what i mean, that why i throught might be stem seals

Rich

 

Anyone

 

BUMP

 

there's a chance it could be valve guides/stem seals. if you are worried then give Karl Norris a buzz, his heads are extremely good value

 

Hi mate,

Just reading about your problem, Ive known this to happen when the original breather non return valve fails on the manifold, allowing the crankcase to pass oil into the manifold causing a smokey exhaust on the overun when manifold vacuum is high. As you have an uprated breather system this unlikely to be the cause of your problem

Going on what you are saying I cant see it being stem seals causing oil in the inlet but it may be causing your smoke on overun as this would draw oil straight down the valves and into the combustion chambers. For oil to transfer this way to the manifold it would have to run uphill, somewhat unlikely. Are you sure it is oil in the manifold and not a build up of sludgey carbon?

A good way to check valve stem seals is to leave the car overnight and see if it smokey on start up in the morning.

Let us know how you get on.

CheeRS, Mike

 

good awswer ever seen a 1.4 cvh in the morning

like the man says leave it if no smoke on start up prob not guides

if black =fuel
blue = oil
white = head gasket

 

A good way to check valve stem seals is to leave the car overnight and see if it smokey on start up in the morning.

Let us know how you get on.

CheeRS, Mike



Surely it would only be smokey in the morning if they were very badly worn, if the cars not running then how does it draw the oil through

 

If the engine is left overnight any residual oil on the valve stem area runs down past the seals through the guides and down on to the valve seat where it can pool when the valve is shut. Granted there will be some valves open and this will cause the oil to run straight into the cylinder.

With the engine is running it is unlikely that the oil will travel past the seals etc quick enough to really notice it smoking unless of course the seals/guides are totally shagged plus the fact that due to thermal expansion of the valve/guide this will reduce the gap anyway..

When the engine has been left overnight the oil that has collected at the valve seats is drawn into the cylinders and burnt causing an initial smokey condition.

CheeRS, Mike.

 

i always expect a little oil in the inlet tract of any turbo charged cra due to the nature of the 'floating' bearings inside the turbo

all my previous rs turbos have had oil in the cross over and boost pipes, regardless of engine condition

 

did the car ever run with the standard breather system on it?? maybe its just been there since.......

I normally check for guide/ stem seal wear by over running down a long hill , and if it puffs when you throttle at the bottom of the hill they are worn.