Friend has the above car. About once a week he adds an inch or so of coolant to the reservoir. There is a small puddle on the floor under the firewall on the drivers side. I found a crack in the neck of the reservoir and replaced it. That was not it, the problem remains. I took one shot at trying to find the leak from above and came up empty. Will put it on the lift tonight and try from the bottom. The plumbing on that engine is a nightmare and it's hard to see anything. Are there any common points (plastic couplers, etc....) where these things leak? Troubleshooting ideas? Thanks!