TD5 changing oil level (not specifically rising)

Hi guys

My 10p TD5 is parked in the same spot every day. Always checked when stone cold the day after driving it.

I've thought recently that the head has got to come off, due to the engine oil level being 10mm above the max on the dipstick and thinking it's cracked with diesel getting into the oil.
Yet today, it's back to where it was when I last serviced it. Bang on the mark!!!

It certainly hasn't burnt it. So what keeps happening here? Because the oil circulation has got to be the same regardless.
Don't really get it??!!

10mm is a lot! are you sure you wiped the dipstick first?

kermit_rr said:

10mm is a lot! are you sure you wiped the dipstick first?

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Yes mate 100%. Same procedure everyone too. Had this before but thought it was perhaps the ground where I checked it. But now it parks in the same place which is tarmac drive.

Sounds like pressure in the sump, all the breathers clear? Check if there’s pressure released (chuffing!) if you remove the oil filler cap at idle.

slomofo said:

Sounds like pressure in the sump, all the breathers clear? Check if there’s pressure released (chuffing!) if you remove the oil filler cap at idle.

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Thanks for the reply. I never thought of it like that, good point. Absolutely no chuffing of out the filler cap or dipstick tube when running. Also Ive replaced the depression control valve in the last couple of thousand miles.