360 Accessing Coolant bleed valve

Use an Airlift type vacuum system and there is no need to use the bleed valve. Simple to use, very effective, low cost and quite a time saver.

https://www.jbtools.com/uview-550000-airlift-cooling-system-tester/?gclid=CjwKCAjwqvyFBhB7EiwAER786bewzFuvnba1uc66JiNgM-_wDVHy84y93d3W_iFFftymmgGaMwiQfRoCKy0QAvD_BwE

 

I use an airlift so I don't have to bleed from the thermostat but if you're talking about the bleed screw on top of the thermostat then you definitely can't get to that from underneath the car.

You could fashion up some universal joints and extensions and get to it from the top though if you don't want to go from the access hole.

 

I also use a vacuum fill system; so much easier. However, don't you still need to bleed if you open up the system between the thermostat and the block? I don't think a vacuum fill will draw coolant past a closed thermostat.

 

I drained my coolant system at the block plug, radiators, and coolant hoses at the base of the firewall , and had no issues with the refill.

 

Did that too. Used a vacuum system to refill and still had some air pocket So used the bleeder screw...

To answer OP, you can easily access the bleed screw from the top with an extension. It’s a straight shoot, I used a mirror to help find it. And I’m talking on a Modena. Pretty sure it’s more difficult on a Spider



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Makes no difference. It goes the other way.

 

You need to examine your method. I have been using vacuum fill systems since they came out and that should not happen.

 

Can access the bleed screw from the top on a Spider as well. 1/4" drive ratchet and a few extensions. BUT, use an airlift as already suggested.