Oil in the water

This I am told a rare occurance however we have it. The Port Ford SABRE 180 Turbo engine overheated due to the drive belt failing and the alarm not sounding, after allowing to cool and refiiting a new belt the engine behaved badly, it was compressing and blowing water out of the header tank, this water also had oil in it. A new head gasket was fitted this stopped the compressing but we still have engine oil in the water which in 2 hours running clogs the "stack" and the raw water is unable to carry away the heat, hence we overheat and have to shut down to tick over to allow the engine to cool. This of course was not acceptable, so the head was removed and sent to be pressure checked, no fault was found other than the head was warped and it was refaced and the valves reset. After refitting with new head gasket we have no compressing but still have oil in the water jacket, any suggestions re a cure will be greatly appreciated

G' day,
If you are sure it is not residuel oil going around in the system then its a fair bet the oil cooler is leaking across the two circuits, will have to be removed and have pressure tested by a radiator shop or similiar.

Good luck, Shakey.

Thank you for your input, but on the Sabre all the oil coolers are cooled by raw water, none of which comes into contact with the fresh water cooling. Our problem was not related to any of the external coolers, we had the head checked and there were no cracks to allow the mixing, but it needed skimming to remove a warped surface, which we had hoped when refitted with a new head gasket the problem would have been solved, this however was not the case, and we still had oil getting into the fresh water, we concluded that our problem must now be a crack in the block between the oil gallery and water jacket, as the oil pressure exceeded the water pressure it was assumed that this was now the cause. Reluctant to write off the engine or even pull it out and pressure check the block we tried some of this.http://www.steelseal.co.uk/ and the problem has gone away for the time being, and hopefully permanently. Yesterday we ran for 2 hours at 2000 rpm, and the temperature remained at 84C WE NOW PROCCED WITH FINGERS WELL AND TRULY CROSSED.