montezuma

Thanks for your interest and information I will get some photos when I next go to the boat .

Hi, I have a a 1.5 which has fresh water cooling by way of a heat exchanger. I haven't been able to find any information or photos of the particular configuration I have although it looks like a factory marinisation job. From the raw water pump the water goes into the bottom of the cylindrical heat exchanger which is cast aluminium with aprprox 5" dia and 10" long this is bolted under the rectangular cast iron header tank which in turn is bolted to the thermostat housing the raw water exits the heat exchanger an goes into the exhaust manifold which is also cast aluminium, from the end of the manifold a pipe emerges and enters the exhaust elbow.Am I right in thinking that the aluminium casting I can see is a water jacket around the actual manifold ? I have noticed there is a small a mount of rust on the rocker shaft if my manifold is cracked or rusted through could water get in to the rocker cover to cause the rust? Last time out it over heated and their seems to be a lack of oil around the rocker gear how can I check that the oil pump is working where can i connect an oil pressure gauge [it dosen't have one] if the engine has been assembled with the head gasket the wrong way around thereby blocking the oil supply to the rockers can i just drill through the head gasket with out removing the head? If any one recognise the set up I have described I would greatly appreciate any information regarding the manufacturer. Thanks.