Not 100% sure about the '87, but there is no PCV valve on the 1986 Volvo 240 2.3L. Flame trap and Oil trap, but no PCV.
It can be a little expensive to replace the EGR valve on the 1987 Volvo 240 DL. The job takes about 1 to 3 hours and can cost as much as about 240 dollars.
Same as any other vehicle ( around $20 in NEV ) unless it is a diesel in which case it will be more than double
I would try a pressure sensitive construction glue such as PL300 for this. Keep it clamped or taped in place for about 4 hours.
The recommended spark plug gap for a 1987 Volvo (all models) is .028"
long answer: yes
The engine valve stem seals are worn. Usually valve stem seal replacement is all that is needed, occasionally there is wear in the valve stems and/or valve guides which requires further repair.
Motorweek - 1987 Volvo C30 27-8 was released on: USA: 26 October 2007
Motorweek - 1987 Volvo XC60 28-34 was released on: USA: 24 April 2009
Motorweek - 1987 Volvo XC60 28-37 was released on: USA: 15 May 2009
Motorweek - 1987 Volvo S60 30-7 was released on: USA: 22 October 2010
Motorweek - 1987 Volvo C70 25-33 was released on: USA: 21 April 2006