Others have given you good
advice.
I have a 2003T, and have used these engines for nearly 15 years and 9500 hours. Here is my
advice for this
engine.
Flush with fresh
water until it runs clear. Also, if it the 2003T model (maybe on the others as well, can't remember), there is a
plug in the
exhaust riser that comes from the
head, just above where the tube from the thermostat goes in. That
plug is an air bleed. Take it out, and fill until water/coolant comes out of there. Otherwise it will not be full, and will run with a hot spot there.
If the
maintenance schedule is unknown, remove and mechanically clean the
heat exchanger, and the
oil cooler (behind the heat exchanger). a .22
cal rifle
cleaning brush works well. Make sure that inside the tube between the thermostat and
exhaust - there is a plastic insert with a small hole in it - it blocks easily - clean it out. Change the
raw water impellor. Any one of these things can/will cause
overheating.
When it's in bits, go to the
volvo dealer and get some of the
cooling system sealing rings - both the flat one, and the one with the groove in the center. You can bet that without some new ones, the
cooling system will leak when reassembled. They are
cheap, and can save lots of frustration!
If the
engine is in good nic, they
work well, although normally a bit smoky when cold.
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