Coolant leak on 1992 300SL

[arthurama]

Hello all. I have replaced expantion tank on my 1992 300SL MB with new one, from 500SL version.
Since then I have noticed a pool of coolant under the car after an hour of driving or so. Seems that it is coming from Expantion vent, located under the middle of the car. Is there coolant capacitly diff between the tanks of 300SL adn 500SL?

 

[spannerman]

Is there a difference in PSI rating of the caps for each tank, or are you still using the original cap from the 300SL?

 

[arthurama]

I had to get new cap

New tank had to get a New Cap; old one did not fit at all...
New cap is a screw-on as oppose to quarter turn one.
Good questions though, in regards to the Cap... SHould there be a differnet pressure one?

 

[Mid_lfe_Crisis]

This maybe a shot in dark but have u got A/C ??? and are u having a water loss problem as the A/C dose leave a pool under the car and is normal

 

[arthurama]

THX Mid_Life, NO A/C though

I dont have AC running and the coolant is definitly Antifreeze