Hello All - I am in need of some suggestions on an overheating issue that I'm having on my 302 that I installed in my 1970 Maverick. The motor came out of a 1968 Mustang. I had the block bored .040 over and hypereutectic pistons installed with stock rods and crank, (The crank was probably turned). It has a mechanical cam and a new stock radiator. I can't seem to find any vacuum leaks from the carb or the top of the intake. I've installed thicker intake gaskets to compensate for the .005 variance of the angle from the head to the intake mating surfaces to eliminate any possible vacuum leaks into the valley. I am not sure where to go from here...Any ideas?
Is the stock radiator for a v8 or i6? Could also be something as simple as a bubble in the cooling system.
Everyone seems to have a different way of getting the air pocket out, but I pull out my coolant temperature sensor while filling it with coolant. Then I run it with the radiator cap off until the t-stat opens. The i6 and v8 rads are different, the i6 is a 2 core while a v8 is a 3 core. If you asked for a radiator at the parts store for a 70 they probably wouldn't have given you a option as all 70 ' s were i6.
Did u put the motor together yourself? If its not a radiator issue then it might be that the head gaskets were installed incorrectly. If you don't pay attention when installing them its easy to get one backwards and block of coolant passages and overheat....... Hopefully thats not the case here.
Are you running a T-stat? Do you have a shroud on the radiator? A 6 cyl rad for a 70 is not going to cool a 302. Ditto the head gasket issue too. Did you put a new water pump on the engine? if so...Did the parts store give you the right one? Most of the computer jockeys in the parts stores these days wouldnt know a waterpump for a 68 mustang from a reverse rotation pump for a 86 mustang. They only know what the computer tells em, and those aint allways right either.
Yes I did put it together myself and was warned about the head gaskets being directional so I paid special attention to that. Thanks!
I am running a 185 t-stat and made a shroud for my electric fan. The Radiator is a 3 core and I did install a Maverick water pump on the motor. Hence I had to make my own timing tab 'cause it is on the opposite side of the motor than the Mustang.
Maybe this may help with my situation. Some time ago, the car went down the 1/4 mile and at approx. 5500 RPM I lost the weight on the flywheel. The car was shut down and towed back to the trailer. I started the car and limped it onto the trailer, Brought it home and replaced the flywheel. Since then it has had an over heating problem. Any more ideas? Could a bent rod be an over heating issue?
It's a Hayden 16" pulling 1300 - 1500 CFM. Just a note, when the car over heats I can shut it down, leave the fan running for 30 seconds, turn the car back on and watch the temp drop 10 degrees. Repeat until it is cooler. FYI - It's 95 to 100 degrees outside while all this is happening.
1500 CFM isnt enough...You want to pull at least 3000 (minimum of 2500 CFM)...A taurus fan will pull 4500...Its an easey and sanitary addition.
Great thanks for the idea!! I'll try to locate one this weekend. Do you know the depth of the fan ? I only have just under 4" to work with between the radiator and the water pump pulley.
