I am trying to remotley repair my daughters car which is in Louisville. I am in Dallas. She says she keeps seeing yellow liquid under her car, but the radiator reservoir is not showing water loss. Doesnt make sense to me. She got a pressure tester from auto zone, but it does not fit. Any ideas, or sources for a pressure tester?

Long shot, but if the brake fluid is newish it can have a yellowish appearance on pavement. Have her check the brake fluid reservoir as a precaution.

The reason it doesn't make sense to you is because both 'facts' can't be correct. If her car isn't losing fluid -- then whatever she's spotting on the ground isn't coming from her car. And if the fluid on the ground is coming from her car, then she hasn't identified yet which area of the car's systems it's coming from.

If there are other symptoms (overheating, etc.) --- different approach from my perspective. It's summer in Louisville. It's hot. The safety that comes from your daughter having a reliable car is what's at stake. Have her take the car to a mechanic/professional who can diagnose and repair. If you're not there to assist, you're gonna have to throw some money at it because that's the approach that will keep your daughter the safest.
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82 242 6.2L coming...; '15 Honda Fit

Great advice from all posters. Thanks
The only Volvo shop I know of in Louisville closed.
I trust no one concerning auto repair. When I was young, I repaired because I was broke. Now I repair because I want it done right, and trust no one. I like for my daughter/ son in law to do minor repairs on their cars. They like it too. That does not change the fact that I am often not a good teacher, and she is often not a good student.
I explained to her the ease of parking a hot car on clean concrete, then moving the car in 5 or 10 minutes, and look for water.. I tried to explain the difference between condensate from AC, and cooling system water.
I am going to make and mail her a homemade "T", and gauge to get in to the system between the overflow tank and the radiator. The auto zone pressure kits will not fit a Volvo 24.

https://www.brickboard.com/SHOPS/

http://www.volvomechanics.com/

http://www.cartalk.com/mechanics-files

Use the BBB and the state consumer protection, and maybe web opinion comments, to check the shop out.

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Give your brickboard.com a big thumbs up! Way up! - Roger Ebert.

Where under the car?
Dan

I know you said yellow, but are you sure it's not just ac condensation?

Just curious now what type of tester like a pump type or a cylinder compression tester. The latter is most common seen first on a shelf.

If she bought a pump type like the Mighty-vac that applies vacuum and pressure she will need a universal adapter. As I remember it ran about $15.
It consists of a rubber step cone that get tightened lightly into the neck of the plastic recovery bottle.

She can then hook up a hose and apply pressure to the system while it's cold.
Just a few psi applied to cold joints, seals and hoses will usually reveal a leak somewhere.

This instrument is Very handy for vacuum leaks with hoses, bottle systems, check valves and vacuum motors.

Mighty-Vac also makes a specific coolant system tester for large metal neck radiators only, of which I have had for more years that I should tell! It is a nicely made kit and heavy duty for shops and comes with an insertion dial thermometer and reads pressure at the same time.

These are way over kill nowadays, IMO with the advent of infrared non-contact thermometers.

Phil