Howdy All,

I've got a 93 245 that is loosing coolant somehow.

I've replaced both of the heater hoses. The radiator, new Volvo OE top and bottom radiator hoses, water pump, thermostat.

I can't find the leak. I've looked everywhere I can think of. I also looked very closely at the exhaust manifold for signs of a leak. The car has never overheated and runs good currently. It does run ruff for a minute max upon starting it...sometimes. Other times it starts and runs strong. No smoke of any color. No steam escaping the tailpipe.

The heater works good as does the a/c with no funny smells or fluid loss inside the car.

I live in the mountains so I've bypassed the radiator transmission fluid cooler and have added a Hayden Automotive 678 Rapid-Cool Plate and Fin Transmission Cooler in front of the radiator. I also have a "tropical" fan clutch.

Because of the changes I've done to the cooling system the car almost never goes above 1/3 on the in car temperature gauge. I've removed the temp. faker also.

It loses about 2.5 inches in the reservoir every 200 miles. I've replaced the reservoir cap with a Stant 10245 Radiator Cap - 11 PSI. When I remove the cap to add coolant I can hear the pressure escaping. I'm not sure how I'm loosing coolant yet the system is obviously pressurized?

I put my old Volvo OE reservoir cap on and it does not keep the system pressurized as when I remove the cap it does not make any noise as the new cap does. Coolant loss also happens with the OE cap.

I'm considering purchasing a Mityvac MV4560 Radiator/Cooling System and Pressure Test Kit. Before I drop $45 I thought I'd ask you guys.

Any help is greatly appreciated!

HACK