Hi Al, Ercoupe engine cooling depends on the area above the upper baffles being a "high pressure" area and that below being a "low pressure" area (relatively speaking). If a nose bowl were fitted that had a fresh air intake hole were installed on a coupe without the cabin fresh air duct and control, that hole MUST be plugged or it will upset the necessary pressure difference.
If your temperature gauge is reading correctly and if the engine is correctly timed, I would recommend removal of the upper and side cowlings (can be done as a unit). At night, place a strong light source low in the engine compartment...first on one side; then on the other. Get on a stool and look down from above. Any gaps of over 1/8" should be reduced. There should be a flexible seal between baffles 17-42 and 17-43 and the side cowls. Originally, a tight seal between 17-39 and 17-40 and the top cowl was by felt pieces glued inside the top cowling. Also verify that front baffles shown in Fig. 17 of the Parts Manual, items 45 and 46 seal well to both the cylinder and the nose bowl, and that the baffle, item 17-47 is installed. A good "rule of thumb" is that when all is as it should be oil temperature should be 100º - 110ºF above ambient OSA. Keep in mind that I'm not a mechanic! Regards, WRB -- On Jun 1, 2010, at 16:08, [email protected] wrote: > hi, need help on oil temp problem. i can not get oil temp down ( > runs on red line). did everything to corrert problem no help. > help---thanks al > >
