Tapping after oil change

[LowStandards]

I've recently bought a van i'm doing a mild resto on, she's been sat for 10 years


The engine however ran like a sewing machine.

I've just changed the oil, and it was very clean, but seemed quite thin to me as it came out


I put in Halfords 20w50 classic mineral oil and changed all the filters etc


Now when I start it I get a tapping noise, at a guess it's a hydraulic tappit that's not happy


Anyone had this?   Did I go for the wrong oil?  Or am I just hoping that the old oil was wrong and the valve clearances were set to that?

 

[R0B]

Its will be tappet bleed down. Take it for a couple of miles run.That usually sorts it.

[LowStandards]

I did leave it overnight before refilling the oil as I had to go out


I can't drive her at the minute as she's not got an mot etc, will it go away idling on the drive do we think?

[R0B]

I don't think leaving it ticking over will do it.

[LowStandards]

It will have to wait until she goes for an mot then


As long as I know i've not killed it with a simple oil change