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Q / have a 1964 Austin diesel FFK 100 series
Page 103
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van which six months ago started pushing water out of the radiator. My garage thought the trouble was being caused by a cracked cylinder head or a gasket; it turned out to be the latter. This last week l have noticed oil coming out of the radiator. I have checked with the garage and once again they changed the cylinder head gasket, checked bores, liners, pistons —all O. K. After one trip of 100 miles oils is still gushing out of the radiator, but no water is getting into the sump. The van has done 119,000 miles. The engine runs as if nothing is wrong or missing and the oil pressure shows 50 p.s.i. Could you please advise?
AWe would suggest your repairers were
correct in assessing a cracked head or faulty gasket on the first occasion you experienced overheating, it could be that the head has sustained further damage through overheating in the shape of a cracked valveguide bore or a crack through an oil-supply or return passage.
As there is no pressure system at the lower end of the engine which could possibly force oil into the cooling system, we would favour the chance of a passage having opened up near the top of the engine. It is strange, however. that no water finds its way into the sump and we feel that this rules out completely liners or block damage. As you have no gas blowing at the head ioint this leaves only the head where the trouble might be.
A pressure test of any oil galleries it contains will show where the trouble lies. Alternatively it could be subjected to a fluorescent crack-testing process.