no
Fuel leak.
Yes, If it is a EFI engine and the leak is infront of the O2 sensor. It will throw off the air/fuel ratio and reduce power.
Built in turbo? That would be your answer. You have the TDI engine, huh? Great engine. Is this your first new diesel? If it's a turbo diesel, you probably have a leak in the boost.
none ................ seals in turbo perished take off hose to turbo and feel in end for any wear on rotor and any oil .....if either are apparant new turbo required or soon new engine
Yes, if there is internal leak.
There is an engine plug that fits in a water jacket on the back of the engine. If the plug is out or damaged it could cause the water to leak out of the back of the engine. You can feel around for a hole when the engine is cool or look for the leak while the radiator is full and the engine is running. Be careful the engine and water will be hot. The plug can be purchased at your local auto parts store for about 5 bucks.
Rebuild the turbo! Your oil contamination is most likely coming from a leak between your turbo's oiling and cooling passages. That's my best guess w/o looking at it.
broken radiator hose, cracked radiator, thermostat gone bad (depending on where its located) or water pump
Do you have an exhaust leak? Do you happen to have have an exhaust leak or a damaged water pump bearing?
If the oil leak in your 1998 Volvo Turbo S70 is specifically from the turbo oil return lines, you may not need to replace the entire turbo. In many cases, you can buy a gasket or seal kit specifically for the return lines, which can effectively resolve the leak. However, it's important to inspect the turbo for any other signs of wear or damage, as that could warrant a replacement. Always ensure you address any leaks promptly to prevent further engine damage.
How do you blow a engine turbo.
It could be water/coolant leaking from the water pump. It will only leak under pressure and can easily cause the engine to overheat. The water pump should be replaced during the 60K service.