If you have a coolant leak at the rear of the engine, there are not too many choices that it could be. Either the turbo itself, the coolant hose to the turbo, or possibly a hose going to the heater core.
SOURCE: how do i gain access to fuelpump on 2002 volvo v70
From Volvo Cars of North America letter I received: "[Volvo] has voluntarily decided to extend warranty coverage for the fuel pump on U.S. model year 2001-2002 Volvo S80, S60, V70, and XC70 vehicles."
The letter goes on to describe conditions that in the end, may result in a fuel odor. "Coverage is limited to the symptoms described in this letter for the fuel pump only."
Contact a Volvo dealer to have this corrected under warranty. If you already paid to have this fixed, then you can submit the repair order with a copy of the warranty letter (keeping both for your records) to Volvo on the address on the letter. If you did not get the letter, I'd suggest contacting Volvo.
Bottom line is that you should not have to pay to have this fixed.
SOURCE: 98 Volvo V70 Turbo engine oil leak
It may be the gromet for the PCV valve or it could be the spark plug rubber seal located in the valve cover if it is the type of engine that has the wires and spark plugs that go down through the valve cover, if this is the case buy a valve cover gasket with the rubber gromets that are located around the base of the hole where spark plugs fit through and install.
SOURCE: where is the engine coolant sensor in a v70 99
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ENGINE TEMPERATURE SENSOR
Removal
Engine temperature sensor, 5-cylinder
Jack up the car.
Remove protection cover from under engine.
Drain the coolant.
Lower the car.
Release coolant hose from thermostat housing using pliers.
Remove thermostat housing.
Remove sensor.
Engine temperature sensor, 6-cylinder
Jack up the car.
Remove protection cover from under engine.
Drain the coolant.
Lower the car.
Loosen oil reservoir for servo pump.
Remove coolant reservoir and put it to one side.
Remove screws and outer/upper timing-gear casing.
Remove screws and wire channel.
Disconnect connector.
Remove 4 screws and thermostat housing.
Remove sensor and wires.
Installation
Engine temperature sensor, 6-cylinder
Install thermostat housing sensor.
Position wires in slot on thermostat housing.
Note! The white marks should be positioned in lower opening of slot, from underneath.
Position gasket on thermostat housing correctly and install thermostat housing using two of the screws.
Position thermostat housing correctly and tighten the four screws.
Position wire channel correctly and position wire in channel.
Tighten screw on wire channel.
Connect the connector.
Install outer/upper timing-gear casing.
Install coolant reservoir.
Install oil reservoir for servo pump.
Follow-on work, 6-cylinder
Fill up coolant.
Warm the engine until the thermostat opens.
Switch engine oft and check the level. Re-fill if necessary.
Check for leaks.
Check in VADIS vehicle communication (read-out of parameter values), for current engine system, that the engine temperature shown appears
correct.
Engine temperature sensor, 5-cylinder
Install in reverse order.
Follow-on work, 5-cylinder
Fill up coolant.
Warm the engine until the thermostat opens.
Switch engine off and check the level. Re-fill if necessary.
Check for leaks.
Check in VADIS vehicle communication (read-out of parameter values), for current engine system, that the engine temperature shown appears
correct.
SOURCE: I have a 2002 Mitsubishi Montero, the coolant
these vehicles have coolant lines running to the back for the heat
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