Over heating 1950 Mercury

K

kustomotors

Junior Member
I have a 1950 Mercury motor I have tried every thing. I was told to use vinegar to clean the inside of the motor. I need some help on how to do this.Thank. BOB,
 
Vinegar in the radiator,drive for 7-10 days-drain and flush then water and baking soda flush followed by water flush.
 
Might want to give more info. Have you checked the motor with a mechanical gauge or a infrared gun? You can clean the block fairly well with the heads off and a long screwdriver. Nothing is better then a nice clean block and rad. Vinegar wont get casting sand, but maybe it's a rebuilt motor???. Only so far a flush will go, but could work.

Next is timing.
 
As I understand it, "No-Rosion" is a cooling system anti-corrosion additive, not a cleaner or radiator flush. When I wanted to clean out my '51 Mercury engine, I used "Rust-911" for 2 flush cycles. It worked very well for me. Here's a link : https://www.fordbarn.com/forum/showthread.php?t=203427&highlight=Rust-911.

BTW, I did get the heads to seal and not leak. The problem was one of the spacers I made to stabilize the heads on the block was just a little too long.
 
tubman said:
As I understand it, "No-Rosion" is a cooling system anti-corrosion additive, not a cleaner or radiator flush. When I wanted to clean out my '51 Mercury engine, I used "Rust-911" for 2 flush cycles. It worked very well for me. Here's a link : https://www.fordbarn.com/forum/showthread.php?t=203427&highlight=Rust-911.

BTW, I did get the heads to seal and not leak. The problem was one of the spacers I made to stabilize the heads on the block was just a little too long.
Click to expand...

"No-Rosion" also has a cooling system cleaner/ flush that works in conjunction with their anti-corrosive additive. And it works on my '51 Mercury engine,my '51 Mercury engine,my '51 Mercury engine.
 
When you say it is overheating what is your definition of overheating? Is it boiling over? What temperature is it running at?
 
51 MERC-CT said:
"No-Rosion" also has a cooling system cleaner/ flush that works in conjunction with their anti-corrosive additive. And it works on my '51 Mercury engine,my '51 Mercury engine,my '51 Mercury engine.
Click to expand...

This makes me laugh but for the life of me I can’t figure out why?!?!.... Mark
 
A lot of things can cause overheating with a flathead V8. A malfunction with the ignition system distributor advance can cause overheating. A radiator with more plugged off tubes than open ones can cause it. Other causes are, core sand blockage in the water jackets, to much core wire in the water jackets, a compression leak into the water jackets, or a coolant leak anywhere in the system. Worn out water pump impellers don't help much either and bad thermostats are also a possibility.

If you clean out an older engine, you can run the risk of opening up leaks that had previously been plugged with the crud you just cleaned out.
 
Are your thermostats opening all the way?
Are your radiator hoses collapsing?
Do you have a leaking head gasket?
 
Sometimes running a hotter thermostat will actually cool better. I had 160 s in mine & it ran hotter than i liked. Put 180s in and the temp actually came down by keeping the coolant in the radiator longer. Runs 180-185 even in hot weather. Correct rad. cap can make a difference too.
 
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