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Posted by Nick What are the symptons of the head gasket going? Thanks --Previous Message--
on 9/4/2007, 5:43 am, in reply to "Rover K16 Head Gasket The real Facts"
Hi
: I have already poste most of this info but
: here is in an easier to find form
: There is a load of rubbish talked about head
: gaskets on the 1.8 K16 here are the facts.
: They apply to all versions of the Rover K16
: engine in the 100/200/400/75 and Free Lander
: as no major part is different from the 1.6
: engine and the head and block are identical
: to the 1.4.
:
: Coolant leaks are initially usually caused
: by the the inlet manifold gasket seeping.
: Often there will be no sign of a leak
: because the coolant is being drawn into the
: engine.
: Rover introduced a modified
: "green" inlet manifold gasket
: (which most vehicles should already have)
: modified studs and a revised tightening
: procedure .
: This was however only a partial cure and the
: gaskets have a life of about 4 years and
: should be changed as a service item. It only
: takes about 30 minutes to change he gasket
: however it may take much longer than this to
: bleed any trapped air out ther cooling
: system. The inlet manifold is unbolted the
: contiuous air bleeder fitting on belt end of
: the manifold should be cleaned out and alsdo
: the pipe fitting at the rear of the
: thermostat should be examind for leaks as
: the the "O" ring which seals it is
: known to cause slight leaks after a few
: years service.
: Read the Rover K16 workshop manual before
: doing this particularly Rovers revised
: coolant bleeding instruction for the K16
: engine.
:
:
:
: As mentioned above another source of coolant
: leak is the connecting pipe at the back of
: the water pump.
: Let the coolant level drop too far and the
: system will air lock.
:
: It is the the OWNERS duty to check the
: coolant level at regular intervals.
: As on any all alloy engine loss of coolant
: circulation will lead to gasket failure.
: On the K16 engine unless it has been truly
: cooked gasket failure usually presents as
: mixing of oil and coolant due to a bead of
: silicone on the gasket getting damaged by
: differential expansion betwen the head and
: the block.
:
: If the engine is over heating but there is
: no sign of the oil and coolant mixing
: suspect either the thermostat is stuck or
: the system is air locked.
:
: Unless the engine has been truly cooked
: fitting and new head gasket and manifold is
: an easy job but the procedures in the K!6
: Overhaul manual must be followed to he
: letter.
:
: Note ---
: (1)New head bolts are not usually required
: provided they meet the checks detailed in
: the manual.
: (2) Exact workshop manual procedures should
: be followed when stripping the head of-
: particularly with regard to order of
: slackening head and cam carrier bolts and
: setting the crankshaft position before
: removing the timing belt.
: (3) It is vital that a proper LOW RANGE
: torque wrench is used to initially tighten
: the head bolts and the that the head bolt
: threads run freely and meet the testes laid
: down in th K16 overhaul manual.
: (4) The liner deck height should be checked
: against the spec in the K16 manual --- if
: slightly out a special thick gasket is
: available.
: (4) Great care must taken in filling and
: bleeding the coolant so as to remove any air
: locks. Note the continuous bleeder at the
: belt end of the inlet manifold is prone to
: blockage.
: (5)The cooling system should only be refiled
: with the correct type of coolant --- Rover
: used two types glycol and OAT they can't be
: mixed.
: (6) Coolant MUST be changed at the interval
: reccommended for the type otherwise after 5
: years or so pin prick corosion occurs on the
: head surface arround the bores.
:
:
:
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