What are these for?
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Cross-Country
Joined: May 2021
Posts: 54
Likes: 1
From: northern Michigan
The blue piece is clearly not hooked up anymore. Just wondering what it was for? The other photo looks like a pump that is tied into the coolant lines that go to the heater. It has a 110v plug tied to it, and it has a coolant line that goes to the side of the motor.
Cargo Master
Joined: Jan 2016
Posts: 2,671
Likes: 372
No idea about the blue thing. The 2nd photo is a tank style block heater. They work great on engines that need them to start in winter time like diesel tractors. And you can set them on a timer to have your truck/car already toasty warm when you get in on a cold morning without having the engine idle for several minutes. They generate more heat (and consume more electric) than a screw in block heater because they're bigger. It doesn't have a pump, it circulates water/coolant by convection.
Butt-Head
Joined: Apr 2004
Posts: 9,432
Likes: 2,919
From: Reed Point, MT
Kudos to the person who installed the tank heater. Usually they're installed on their side on the inner fender by the starter solenoid and then assumed to be bad since they weren't installed correctly.
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Cargo Master
Joined: Jan 2016
Posts: 2,671
Likes: 372
Just saw your comment on the freeze plug. It should not replace a pressed in style freeze plug...might but shouldn't. Lot of these older engines have pipe threaded plugs to drain the block. Use some pipe thread sealant and it will be good to go. Use a proper fitting tool to unscrew the fitting (i.e. not an adjustable wrench). They tend to be hard to unscrew after 50 years. If you're nervous about messing up the fitting, you could install a new short piece of hose and put a plug in the hose. And leave the screwed in fitting alone.
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Cargo Master
Joined: Jan 2016
Posts: 2,671
Likes: 372
Yep, they do have to be at the correct height and correct side of engine to have good convection.
Senior User
Joined: Feb 2018
Posts: 206
Likes: 4
From: Harrisburg
Gotta love these pre-computer cars.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Some other states may have also required Evap/Em as well.
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