Hi. My 928 is leaking antifreeze. I cannot see where it is coming from. I've put a pressurizer on the car and set at 7 pounds. It leaks at the front of the engine on the passenger side and in the rear near the catalytic converter. It sounds bad, like it's coming from the engine. All hoses are holding fine. Any ideas? Help!

 

pressurize at 12-13 lbs. the heater valve and short hose from the cylinder head are suspects for the rear leak but you need to remove the air cleaner housing to see much. Front leak could be the radiator pass side (Right) tank seal .

helps if you post the year of your 928 since things did change....

 

Hi thanks! It's a 1984 928S.

 

The more history and information about your car and what you did etc...
the more help you are going to get.....
The leaks could also be the hoses that go to the coolant bottle and the bottle. I replaced that hose from the bridge to the bottle. How's the top rad hose, may need to loosen and tuck further in and tighten.

 

If YOU have NOT changed all the hoses it could easily be leaking almost anywhere !! They are possibly 30 years old !! Hoses were NEVER designed to last that long. These are GREAT cars but the rubber and plastic only lasts so long.

What makes a new car reliable ?? all the rubber is new

 

If your radiator and coolant bottle are in good shape, then a very good "piece of mind" way is to change all the cooling system hoses (except the ones that goes to the heater core) get them from Roger.