paradise_beach
New member
"Why doesn't my heat excha
"Why doesn't my heat exchanger get hot, while the temperature gauge bounces to extreme temps in a few seconds? I have a 165hp 3.7litre 224cid. I have an external waterpump and an external alternator all driven by fanbelt on the crankshaft. I've checked the flow of water by putting a hose and running the water and everything flows ok. Even thru the heat exchabger!!! But when i start the engine it starts nice and beautiful to hear it idle!!! But after a minute or two my temp gauge exponantially climbs to higher temps, therefore i must shut off the engine when it reaches 220-240 degrees!!!! I put my hand on the heatexhanger and surprisingly it's cold or room temperature as they say!!! How is this possible???? And it was running nice on the sea...I took the boat out of the water so that i can sandblast the head,had the cilinder head shavended off nicely again and put a new head gasket with interval torques to 150. and now i want to keep on enjoying the beaches and the engine overheats in barely five minutes!!! Any one with suggestions?"
"Why doesn't my heat exchanger get hot, while the temperature gauge bounces to extreme temps in a few seconds? I have a 165hp 3.7litre 224cid. I have an external waterpump and an external alternator all driven by fanbelt on the crankshaft. I've checked the flow of water by putting a hose and running the water and everything flows ok. Even thru the heat exchabger!!! But when i start the engine it starts nice and beautiful to hear it idle!!! But after a minute or two my temp gauge exponantially climbs to higher temps, therefore i must shut off the engine when it reaches 220-240 degrees!!!! I put my hand on the heatexhanger and surprisingly it's cold or room temperature as they say!!! How is this possible???? And it was running nice on the sea...I took the boat out of the water so that i can sandblast the head,had the cilinder head shavended off nicely again and put a new head gasket with interval torques to 150. and now i want to keep on enjoying the beaches and the engine overheats in barely five minutes!!! Any one with suggestions?"