95
306. Connect all wires to the alternator, the starter
motor and the temp sender. The wire to the oil pres-
sure sender is connected later. Connect the ignition
wires to the spark plugs and the ignition coil.
Overhauling the oil cooler 250,
251DOHC, AQ151, AQ171
307. Remove the center screw (1) and remove both
end covers (2) and (3). Remove the O-rings (4) in-
stalled on the cooler insert. Push out the insert (5).
Watch out for oil spillage! Clean and use com-
pressed air to blow out the insert internally. Check
that the passage in the drain cock (6) is not clogged.
Install the insert in the housing and install the O-
rings on the insert. (Replace the O-rings if neces-
sary!). Install the end covers and tighten them by
the center screw. Replace the O-ring (7) should it be
damaged. Check and replace the O-ring (8) if neces-
sary.
308. Install a new O-ring and install the oil cooler on
the engine but do not tighten it.
309. Connect the cooling water pipes along with new
rubber sealings to the oil cooler. On model 230,
AQ131 the cooling water pipe goes straight from the
exhaust manifold to the heat exchanger. The picture
shows model 250, AQ151.
310. Tighten the cooling water pipe to the exhaust
manifold. Tool width: 10 mm.
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