OK I installed a 1991 5.0 HO engine into my 1967 mustang which was originally a 6cyl. we swapped out the timing gear cover and put on a clock wise water pump for a V belt for a 1970 mustang. I'm using a cast iron four barrel ford intake from an early model car. I have not replaced my radiator but i have one coming. We have pulled the heads and replaced the gaskets put new rings and bearings and honed the cylinders. we checked and the gaskets have the tabs poking out of the front of the head so we know they installed correctly. The engine runs fine but it keeps pushing the water out of the radiator until the water level gets low then and only then it starts to over heat. We have checked the spark plugs and they are not oily or steamed cleaned. We have replaced the thermostat twice. The engine runs for about 5 mins then the intake and the valve covers are very hot. There is not any water in the oil. please if you have any suggestions I'm at my wits end.
5.0 Cooling Issues
- Thread starter psstevens1
- Start date
jcgafford
10 Year Member
same kind of question here. maybe it will answer it for you. http://www.moddedmustangs.com/forums/5-0-mustangs/259105-belt-water-pump-question.html
sounds like it is running in reverse if it pumps water out like you describe.
sounds like it is running in reverse if it pumps water out like you describe.
Thank you for the info I will try the crown vic water pump. Also to 2+2 GT I have a three row copper radiator in it now but it 18" wide and had ports for the 6cyl. Which are both 1 1/4" compared to the V8 which is 20" wide with 1 1/2" top and 1 3/4" bottom ports but i did not think that it would make that much difference but will find out when i swap to the V8 3 row aluminum radiator.
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