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TR2/3/3A TR 3A Heater Hose replacement

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R

RonR

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Folks,

I am replacing all the hoses on my TR 3A in anticipation of actually starting the car and driving it after it has set for 2 years in my garage and 2 years in someone else's garage.

Does one have to remove the heater from under the dash in order to access the heater hose conenctions on the top of the heater? If so, how is the heater secured to the car?

Thanks.
Ron
 
Yup, it's pretty much got to come out. There is one stud that sticks through the firewall with a nut under the hood. Then each side mounts to the stiffening bracket that runs between the back of the dash and the battery box. Easiest IMO is to undo the screws holding the heater frame to the stiffening brackets, and remove one of the brackets.

But it's been a long time, so others may have better ideas.

Good idea to flush the heater core while it's out, and check that the lines are open. There is a definite tendency for crud to pile up both inside the core, and in the return line on the LH side of the engine.

Or if you are in a hurry, just disconnect and plug the lines under the hood. The heater was optional anyway.
 
The heaters are very tight and some of the concerns are to be careful of the temperature gauge line (if original) because once broken that needs to be rebuilt. Unhook the battery because you are going to be hitting wires that are exposed and probably take some pictures. If the glove box is out, that helps a lot. You will probably find out if you plan to work on the vehicle removing the glove box and leaving out until you are just about finished is smart. I have replaced heater hoses with the heater in place, but it takes some working in tight quarters and patients. Nevertheless, it is perhaps best when you can tilt the heater, and if the glove box is out, by just removing the one stabilizing bar and loosen the other and pull the nut off the stud on the firewall to get access to the hoses. This will keep things pretty much in place without smashing into wires and having to make a heater size removing hole under the dash and still hold the weight of the heater.
Steve
 
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