jagtoes

Either something went wrong with the removal and re-installation of the cooler. Or the other potential problem is by changing the cooler you have unmasked the problem and it is now showing. If you had coolant in the oil before you may have washed the bearings and now lost oil pressure. What do your new fluids look like now. Water in oil or oil in water. Compression problems may be caused by running coolant in the oil causing ring damage. Good luck but it doesn't sound good.

Ebac69

Hi,

Its oil in the coolant. It looks like a layer of brown oil approximately 10mm thick on the top surface of the coolant bottle with the pink coolant easily visible underneath. The engine oil isnt milky and looks like there is only a little bit of sludge build up when i take off the sump.

I took the cooler back off to see if it was blocked but it looks fine. I put it back together again and tested compression but once again it goes up and then drops out.

Its deff left me scratching my head and i dont really know where to go from here to be honest. Oil pump perhaps?