tom1979 · Feb 15, 2020

Noticed my oil level was a bit high a few weeks ago so stopped driving it and today gone to do the injector seals. I can't see any diesel coming up but found the oil had thick glupy spots on the rocker cover. Is this due to diesel dilution? The oil was only changed around 3 months ago / maybe 1500-2000miles. I've seen it before on other peoples vehicles but assumed it was down to not changing the oil...

kermit_rr · Feb 15, 2020

I'd say that was pretty normal. Oil gets sprayed up, dries a bit
Repeat
Eventually you get deposits

jamesmartin · Feb 15, 2020

tom1979 said:
Noticed my oil level was a bit high a few weeks ago so stopped driving it and today gone to do the injector seals. I can't see any diesel coming up but found the oil had thick glupy spots on the rocker cover. Is this due to diesel dilution? The oil was only changed around 3 months ago / maybe 1500-2000miles. I've seen it before on other peoples vehicles but assumed it was down to not changing the oil...

View attachment 200686

diesel just thins it,lack of changes is where i usually see it

tom1979 · Feb 15, 2020

jamesmartin said:
diesel just thins it,lack of changes is where i usually see it

That's what I was think but.... oil gets changed very regularly here - probably every 2-3000 miles! As long as it's "normal" that's fine

I've only seen it in vehicles that don't get looked after!

kermit_rr · Feb 15, 2020

Guess it depends on the age of the motor!
I've only ever taken rocker covers off older examples, never looked inside a 5 year old engine
Lack of oil changes won't help, but, of it sounds sweet then all is good

tom1979 · Feb 15, 2020

kermit_rr said:
Guess it depends on the age of the motor!
I've only ever taken rocker covers off older examples, never looked inside a 5 year old engine
Lack of oil changes won't help, but, of it sounds sweet then all is good

2003 - 185000 miles

kermit_rr · Feb 15, 2020

tom1979 said:
2003 - 185000 miles

I don't know for sure, in not a pro mechanic that's seen 1000s of motors, but that engine has gone thru a lot of heat cycles, i wouldn't expect it to look like new

tom1979 · Feb 15, 2020

What do we reckon the yellow would be? I like butter, but not in my engine

kermit_rr · Feb 15, 2020

Hadn't noticed that! Is it like the 'milk' you get from oil/water mix? Condensate from a few short journeys?
Have you found the cause of the high oil level?

tom1979 · Feb 15, 2020

kermit_rr said:
Hadn't noticed that! Is it like the 'milk' you get from oil/water mix? Condensate from a few short journeys?
Have you found the cause of the high oil level?

I was just thinking that, I do a fair amount of short journeys. I haven't pulled in injectors yet but I couldn't see or hear any diesel coming up from around them. Very odd - as you can normally see it

tom1979 · Feb 15, 2020

On closer inspection there are spots of red in the oil, looks like coolant! So how would there be coolant in the oil but no oil in the coolant ?

kermit_rr · Feb 15, 2020

tom1979 said:
On closer inspection there are spots of red in the oil, looks like coolant! So how would there be coolant in the oil but no oil in the coolant ? This head was pressure tested in October before we refitted it

Oops! High pressure coolant can get into oil on low pressure side. Think that's what can happen if you have a poorly oil cooler. But i might be mixed up

tom1979 · Feb 15, 2020

kermit_rr said:
Oops! High pressure coolant can get into oil on low pressure side. Think that's what can happen if you have a poorly oil cooler. But i might be mixed up

From what I've read failed oil cooler seals let oil in the coolant, coolant in the oil is more likely head

kermit_rr · Feb 15, 2020

Yes couldn't remember, i knew it was one or the other lol

vincentwhowse · Feb 15, 2020

hi my disco Is poorly.
shuddering in gear. windscreen crack 3 lights on maybe time to sell advice, please.

Discodevon · Feb 19, 2020

Looks like your engine has been used for short distance driving where it hasn’t got up to temp,

Try using forte engine flush then change oil and filter (10w40 semi)

tom1979 · Feb 19, 2020

Discodevon said:
Looks like your engine has been used for short distance driving where it hasn’t got up to temp,

Try using forte engine flush then change oil and filter (10w40 semi)

That's what I assumed at first but the oil cap was clean (normally get sludge in it) then I found coolant in the oil.

Discodevon · Feb 19, 2020

tom1979 said:
That's what I assumed at first but the oil cap was clean (normally get sludge in it) then I found coolant in the oil.

The oil cap doesn’t get affected as the oil splash guard is in the way really, if the cam lobes and rockers are in good shape then you are not to worry

tom1979 · Feb 19, 2020

Discodevon said:
The oil cap doesn’t get affected as the oil splash guard is in the way really, if the cam lobes and rockers are in good shape then you are not to worry

I'm more concerned about where the coolant has come from

Discodevon · Feb 19, 2020

it”ll be alright mate don’t worry for the minute, can you clean the bits on the rocker cover with brake cleaner, then after that forte engine flush

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