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Coolant leak

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Do they still make heater cores for these or NLA? Does dashboard have to be pulled?


I don't believe the dash needs to be pulled. It's part of the heater assembly in the middle. It could be the heater core, or it could be the heater valve itself leaking. As mentioned the heater core can be rebuilt by any radiator shop. The valve is NLA, however there have been several posts on here showing how you can rebuilt it yourself with a few orings.

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Occam's Razor. Simplest answer is usually the correct one. Hose to the head. Maybe rotted and needs replacing. Maybe the clamp or hose clamp needs tightening. Hoses will wear out faster than the heater core will. Much more likely that you will replace the hoses several times in the life of the car than the heater core.

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Easiest thing to do is just get down there with a flash light. If the driver side is damp, get a flashlight down there and see if you can see signs of where its coming from. Once you know that you can move onto the next step.

On the 710, I couldnt see the valve from the driver side of the engine, it was against the firewall. I had to remove some of the ducting from the heater core, and a few bolts later I could rotate the heater core assembly and see the valve. Theres a diagram of the heatercore on the 510 somewhere around here but I can't find it.

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